Trimble 6829395 GPS Receiver + 900 MHz + Wi-Fi + Bluetooth Radio User Manual

Trimble Navigation Ltd GPS Receiver + 900 MHz + Wi-Fi + Bluetooth Radio Users Manual

Users Manual

Version 4.60Revision AApril 20121GETTING STARTED GUIDETrimble SPS985 GNSS Smart Antenna1
Corporate OfficeTrimble Navigation Limited935 Stewart DriveSunnyvale, CA 94085USAwww.trimble.comHeavy Highway business areaTrimble Navigation LimitedHeavy Highway business area5475 Kellenburger RoadDayton, Ohio 45424-1099USA800-538-7800 (toll free in USA)+1-937-245-5600 Phone+1-937-233-9004 Faxwww.trimble.comEmail: trimble_support@trimble.comLegal Notices© 2006–2012, Trimble Navigation Limited. All rights reserved.Trimble, and the Globe & Triangle logo are trademarks of TrimbleNavigation Limited, registered in the United States and in othercountries. AutoBase, CMR, CMR+, Connected Community, EVEREST,HYDROpro, Maxwell, Micro-Centered, Trimble Geomatics Office,SiteNet, TRIMMARK, TRIMTALK, TSCe, VRS, Zephyr, and ZephyrGeodetic are trademarks of Trimble Navigation Limited.Microsoft, Windows, and Windows Vista are either registeredtrademarks or trademarks of Microsoft Corporation in the United Statesand/or other countries.The Bluetooth word mark and logos are owned by the Bluetooth SIG,Inc. and any use of such marks by Trimble Navigation Limited is underlicense.All other trademarks are the property of their respective owners.Support for Galileo is developed under a license of the European Unionand the European Space Agency (SPS985/SPS855/SPS555H).NTP Software Copyright© David L. Mills 1992-2009. Permission to use, copy, modify, anddistribute this software andits documentation for any purpose with orwithout fee is herebygranted, provided that the above copyright noticeappears in allcopies and that both the copyright notice and thispermissionnotice appear in supporting documentation, and that thename University of Delaware not be used in advertising or publicitypertaining to distribution of the software without specific,written priorpermission. The University of Delaware makes no representations aboutthe suitability this software for any purpose. It is provided "as is" withoutexpress or implied warranty.Release NoticeThis is the April 2012 release (Revision A) of the SPS Modular Receiverdocumentation. It applies to version 4.60 of the receiver firmware.Product Limited Warranty InformationFor applicable product Limited Warranty information, please refer to theLimited Warranty Card included with this Trimble product, or consult yourlocal Trimble authorized dealer.NoticesClass B Statement – Notice to Users. This equipment has beentested and found to comply with the limits for a Class B digital devicepursuant to Part 15 of the FCC Rules. Some equipment configurationsinclude an optional 410 MHz to 470 MHz UHF radio transceiver modulecompliant with Part 90. These limits are designed to provide reasonableprotection against harmful interference in a residential installation. Thisequipment generates, uses, and can radiate radio frequency energy and,if not installed and used in accordance with the instructions, may causeharmful interference to radio communication. However, there is noguarantee that interference will not occur in a particular installation. Ifthis equipment does cause harmful interference to radio or televisionreception, which can be determined by turning the equipment off andon, the user is encouraged to try to correct the interference by one ormore of the following measures:– Increase the separation between the equipment and the receiver.– Connect the equipment into an outlet on a circuit different from that towhich the receiver is connected.– Consult the dealer or an experienced radio/TV technician for help.Changes and modifications not expressly approved by the manufactureror registrant of this equipment can void your authority to operate thisequipment under Federal Communications Commission rules.This equipment must be installed and operated in accordance withprovided instructions and the antenna(s) used for this transmitter mustbe installed to provide a separation distance of at least 20 cm from allpersons and must not be co-located or operated in conjunction with anyother antenna or transmitters (except in accordance with the FCC multi -transmitter product procedures).CanadaThis Class B digital apparatus complies with Canadian ICES-003.Cet appareil numérique de la classe B est conforme à la norme NMB-003du Canada.This apparatus complies with Canadian RSS-GEN, RSS-310, RSS-210, andRSS-119.Cet appareil est conforme à la norme CNR-GEN, CNR-310, CNR-210, etCNR-119 du Canada.EuropeThe product covered by this guide are intended to beused in all EU member countries, Norway, andSwitzerland. Products been tested and found to complywith the requirements for a Class B device pursuant toEuropean Council Directive 89/336/EEC on EMC, thereby satisfying therequirements for CE Marking and sale within the European EconomicArea (EEA). Contains a Bluetooth radio module. These requirements aredesigned to provide reasonable protection against harmful interferencewhen the equipment is operated in a residential or commercialenvironment. The 450 MHZ (PMR) bands and 2.4 GHz are non-harmonized throughout Europe.CE Declaration of ConformityHereby, Trimble Navigation, declares that the GPS receivers are incompliance with the essential requirements and other relevantprovisions of Directive 1999/5/EC.Australia and New ZealandThis product conforms with the regulatory requirements ofthe Australian Communications and Media Authority(ACMA) EMC framework, thus satisfying therequirements for C-Tick Marking and sale within Australiaand New Zealand.Restriction of Use of Certain Hazardous Substances in Electricaland Electronic Equipment (RoHS)Trimble products in this guide comply in all material respects withDIRECTIVE 2002/95/EC OF THE EUROPEAN PARLIAMENT AND OF THECOUNCIL of 27 January 2003 on the restriction of the use of certainhazardous substances in electrical and electronic equipment (RoHSDirective) and Amendment 2005/618/EC filed under C(2005) 3143, withexemptions for lead in solder pursuant to Paragraph 7 of the Annex tothe RoHS Directive applied.Waste Electrical and Electronic Equipment (WEEE)For product recycling instructions and more information,please go to www.trimble.com/ev.shtml.Recycling in Europe: To recycle Trimble WEEE (WasteElectrical and Electronic Equipment, products that run onelectrical power.), Call +31 497 53 24 30, and ask for the“WEEE Associate”. Or, mail a request for recyclinginstructions to:Trimble Europe BVc/o Menlo Worldwide LogisticsMeerheide 455521 DZ Eersel, NLSPS985 GNSS Smart Antenna Getting Started Guide 2
Unlicensed radios in productsThis device complies with part 15 of the FCC Rules.Operation is subject to the following two conditions:(1) This device may not cause harmful interference, and(2) This device must accept any interference received, includinginterference that may cause undesired operation.Licensed radios in productsThis device complies with part 15 of the FCC Rules.Operation is subject to the condition that this device may not causeharmful interference.SPS985 GNSS Smart Antenna Getting Started Guide 3
ContentsIntroduction 5Related information 6Batteries 6Battery safety 6Charging the Lithium-ion battery 7Battery charger 7Removing the battery 9Parts of the SPS985 Smart GNSS antenna 10Front panel 10Lower housing 11Button and LED operations 12Power button 12Satellite LED 13Radio LED 13Wi-Fi LED 14Battery LED 14Lemo port 14Activation 15Activating your SPS GNSS Receiver 15The WinFlash utility 17Wi-Fi Settings 18SSID Identification 23Configuring a PC USB port as a virtual serial port 24Logging data 25Troubleshooting 26Troubleshooting receiver issues 26Glossary 28SPS985 GNSS Smart Antenna Getting Started Guide 4
IntroductionThe SPS985 GNSS smart antenna can be used for the following infrastructure and site developmentapplications:lLayout of structure foundations, caissons, and pileslEarthworks, fine grading and finishing stakeout operationslInitial site measurements to verify design levels and regular subsequent measurements todetermine progress volumeslVehicular-mounted site supervisor applicationslMeasurements and grade/thickness checks on laid materialsThe GNSS smart antenna incorporates a GNSS antenna, receiver, internal radio, and battery in arugged light-weight unit that is ideally suited as an all-on-the-pole RTK rover or quick setup/rapidmobilization base station. LEDs enable you to monitor satellite tracking, radio reception, datalogging status, Wi-Fi, and power. Bluetooth wireless technology provides cable-freecommunications between the receiver and controller.You can use the SPS985 smart antenna as part of an RTK GNSS system with the Trimble SCS900 SiteController software. The receiver can optionally record GPS data to the receiver’s optional internalmemory and download to a computer using the serial connection.The GNSS smart antenna has no front panel controls for changing settings. To configure thesereceivers:lIn real time, use external software such as the SPS web interface, the HYDROpro software, orthe WinFlash utility.lUse an application file. To edit an application file, use the Configuration Toolbox utility.SPS985 GNSS Smart Antenna Getting Started Guide 5
Related informationSources of related information include the following:lRelease notes – The release notes describe new features of the product, information notincluded in the manuals, and any changes to the manuals. They can be downloaded from theTrimble website at www.trimble.com/support.shtml.lTrimble training courses – Consider a training course to help you use your GNSS system to itsfullest potential. For more information, go to the Trimble website atwww.trimble.com/training.html.BatteriesThe SPS985 GNSS smart antenna has one Lithium-ion battery which can be charged when it isplugged into an external power source through Port 1, or the battery can be removed for charging.During measurement operations, each internal battery typically provides about 4 hours of power ifusing the internal Rx (receive) radio and about 3.5 hours operating as a base station using theinternal transmit radio. These times vary according to the type of measurement and the operatingconditions.Battery safetyCharge and use the battery only in strict accordance with the instructions provided.WARNING – Do not damage the rechargeable Lithium-ion battery. A damaged battery can cause an explosion orfire, and can result in personal injury and/or property damage.To prevent injury or damage:– Do not use or charge the battery if it appears to be damaged. Signs of damage include, but are not limited to,discoloration, warping, and leaking battery fluid.– Do not expose the battery to fire, high temperature, or direct sunlight.– Do not immerse the battery in water.– Do not use or store the battery inside a vehicle during hot weather.– Do not drop or puncture the battery.– Do not open the battery or short-circuit its contacts.WARNING – Avoid contact with the rechargeable Lithium-ion battery if it appears to be leaking. Battery fluid iscorrosive, and contact with it can result in personal injury and/or property damage.To prevent injury or damage:– If the battery leaks, avoid contact with the battery fluid.– If battery fluid gets into your eyes, immediately rinse your eyes with clean water and seek medical attention.Do not rub your eyes!– If battery fluid gets onto your skin or clothing, immediately use clean water to wash off the battery fluid.SPS985 GNSS Smart Antenna Getting Started Guide 6
Connecting the receiver to a vehicle batteryWARNING – Use caution when connecting battery cable's clip leads to a vehicle battery. Do not allow any metalobject or jewelry to connect (short) the battery's positive (+) terminal to either the negative (-) terminal or themetal of the vehicle connected to the battery. This could result in high current, arcing, and high temperatures,exposing the user to possible injury.WARNING – When connecting an external battery, such as a vehicle battery, to the receiver, be sure to use theTrimble cable with proper over-current protection intended for this purpose, to avoid a safety hazard to the useror damage to the product.Charging the Lithium-ion batteryThe rechargeable Lithium-ion battery is supplied partially charged. Charge the battery completelybefore using it for the first time. If the battery has been stored for longer than three months, chargeit before use.WARNING Charge and use the rechargeable Lithium-ion battery only in strict accordance with the instructions.Charging or using the battery in unauthorized equipment can cause an explosion or fire, and can result in personalinjury and/or equipment damage.To prevent injury or damage:– Do not charge or use the battery if it appears to be damaged or leaking.– Charge the Lithium-ion battery only in a Trimble product that is specified to charge it. Be sure to follow allinstructions that are provided with the battery charger.– Discontinue charging a battery that gives off extreme heat or a burning odor.– Use the battery only in Trimble equipment that is specified to use it.– Use the battery only for its intended use and according to the instructions in the product documentation.To charge the battery, first remove the battery from the receiver, and then place it in the batterycharger, which is connected to mains power.Battery chargerThe charger can charge two types of Lithium-ion batteries. It can be powered by mains or vehiclebattery. The following figure shows the GPS and Total Station battery, dual slot battery charger (P/N53018010), power supply (P/N 78650) and AC power cable (P/N 78651):SPS985 GNSS Smart Antenna Getting Started Guide 7
The Charger Kit Dual Slot consists of:lCharger dual-battery slotlPower supply for chargerlCable AC kit AC for power supplyChargeable batteriesThe charger can charge the following types of batteries:lLithium-ion Rechargeable Battery (Smart Battery), 4.4 Ah, 11.1 V, P/N 49400lLithium-ion Rechargeable Battery, 2.6 Ah, 7.4 V, P/N 92600-HHlLithium-ion Rechargeable Battery, 2.4 Ah, 7.4 V, P/N 54344Charger slotsThe charger has two slots. Each slot can charger either type of a battery. Batteries are chargedsequentially. Beside each slot are two LED indicators (red and green) to indicate the battery status.Power supplyThe charger can be powered by mains (using the power supply for the charger) or by using a 12 V caradapter-to-charger cable.SPS985 GNSS Smart Antenna Getting Started Guide 8
Removing the battery1. Open the battery slot, which is on the side of the smart antenna.2. Pull the battery out of the slot.SPS985 GNSS Smart Antenna Getting Started Guide 9
Parts of the SPS985 Smart GNSS antennaAll operating controls are located on the front panel. Ports and connectors are located on thebottom of the unit.Front panelThe front panel contains the Power button and four indicator LEDs.lThe Power button controls the receiver’s power on or off functions.lThe indicator LEDs show the status of power, satellite tracking, Wi-Fi, and radio reception.Icon ConnectionsPower buttonSatellitesRadioBattery statusWi-FiThe LEDs on the front panel indicate various operating conditions. Generally, a lit or slowly flashingLED indicates normal operation, a LED that is flashing quickly indicates a condition that may requireattention, and an unlit LED indicates that no operation is occurring. For more information, seeButton and LED operations, page 12.SPS985 GNSS Smart Antenna Getting Started Guide 10
Lower housingEach item is marked with a number to indicate its main function, as shown in the following table:Icon Name Connections/Description1 Label The icon on the label shows if the antenna contains an internal radio or if it a Wi-Fionly smart antenna2 TNC radioantennaconnectionCommunications antenna3 Label Shows the serial number of the smart antenna4 Battery door Removable Lithium-ion battery5 5/8" insert Range pole or quick release adapter6 Lemo port USB and DC power inLemo port is a 7-pin 0-shell 2-key Lemo connector that supports USB communications and externalpower input. The Lemo port has no power outputs.The TNC port connector is for connecting a radio antenna to the receiver internal radio. A whip“rubber duck” antenna is supplied with the system. This connector is not used if you are using anSPS985 GNSS Smart Antenna Getting Started Guide 11
external radio receiver. For longer range operation (to provide higher gain and to raise the antennahigher above the ground), you can use a cable to connect an external radio antenna to the TNCport. For more information, refer to the topic "Connecting the receiver to external devices" in theWeb Help.Button and LED operationsNote – SPS985 onlyThe LEDs on the front panel indicate various operating conditions. Generally, a lit or slowly flashingLED indicates normal operation, a LED that is flashing quickly indicates a condition that may requireattention, and an unlit LED indicates that no operation is occurring. The following table defines eachpossible LED state:The term... means that the LED...Very slowflashis off and on equally with a 1.5 second cycle.Slow flash alternates on/off every ½ second.Radio slowflashis off longer than it is on when the smart antenna is receiving corrections. The smartantenna repeats this cycle typically once per second.is on more than off when the smart antenna is transmitting corrections. The smart antennarepeats this cycle typically once per second.Medium flash is off and on equally more than once per second.Fast flash alternates rapidly on/off every 1/10 of a second.On is lit steady.Off is unlit.Power buttonAction Power button DescriptionTurn on thesmartantennaPress (see thenote below)All four LEDs light up and remain lit for 3 seconds. Then all LEDs go off andthen the power LED immediately comes back on.Turn off thereceiverHold for 2seconds andthen releaseWhen holding down the Power button; the battery LED remains on. The Wi-Fi LED remains in its state and then turns off after 2 seconds. The SatelliteLED turns constant and then turns off after 2 seconds.After releasing the power button, the battery LED stays lit for about 5seconds and then all LEDs go blank.Clear the Hold for 15secondsThe Radio, Wi-Fi, and Satellite LEDs turn off after 2 seconds. The battery LEDremains on. After 15 seconds, the Satellite LED comes on to indicate that it isSPS985 GNSS Smart Antenna Getting Started Guide 12
Action Power button Descriptionephemerisfile and resetthe smartantenna tothe factorydefaultstime to release the Power button.DeleteapplicationfilesHold for 30secondsThe Radio, Wi-Fi, and Satellite LEDs turn off after 2 seconds. The battery LEDremains on. After 15 seconds, the Satellite LED comes on and stays on for 15seconds, then turns off to indicate that it is time to release the Powerbutton. The battery LED then remains on for 15 seconds after releasing thePower button. The smart antenna then restarts.Note – The term “press” means to press the button and release it immediately. The term “hold”means to press the button and hold it down for the given time.Satellite LEDReceiver mode Satellite LED AmberNo satellites or < 1 satellite tracked OffBoot up or in Monitor mode OnTracking <4 SVs Fast flashTracking >4 SVs Slow flashRadio LEDRadio mode RadioLEDAmberDescriptionNo receive ortransmitOffReceive Radio slow flash See the table at the top of this topic.This LED also flashes when using the Wi-Fi only for receiving corrections.Transmit Radio slow flash See the table at the top of this topic.This LED also flashes when using the Wi-Fi only for transmittingcorrectionsSPS985 GNSS Smart Antenna Getting Started Guide 13
Wi-Fi LEDReceiver mode Wi-Fi LED AmberWi-Fi off OffWi-Fi is Access Point (Base mode / sending corrections) Medium flashWi-Fi is client (and not connected to an Access Point) OffWi-Fi as client (Rover mode receiving corrections) Very slow flashBattery LEDReceiver mode Power LED Green DescriptionOff OffOn. Healthy power On Either internal battery or external powerLow power Fast flash (<about 15% power)Logging data internally Flashes off every threesecondsLemo portWhen you load firmware using the WinFlash utility, the LEDs show as:Button/LED AppearsOnOffSee the Satellite LED, page 13 section above.OffSPS985 GNSS Smart Antenna Getting Started Guide 14
ActivationActivating your SPS GNSS ReceiverBefore you can use your SPS GNSS receiver, it must be activated with an Activation code. Usuallyyour Trimble dealer will do this for you. If you need to do it yourself, you must connect a computerthat has the Trimble WinFlash utility installed to the SPS GNSS receiver, and then use the WinFlashutility to load the Activation code onto your receiver. The Activation code also enables the Wi-Fi(SPS985 only) and Bluetooth wireless technology services in your SPSGNSSreceiver.SPS985 smart antennaThe SPS985 smart antenna is shipped with Wi-Fi and Bluetooth wireless technology servicesdisabled.To activate the smart antenna and to enable Wi-Fi and Bluetooth wireless technology services:1. The SPS985 smart antenna only has a USB interface. Use cable P/N 80751-HH to connect thesmart antenna to the computer and the USB port.2. Download and install the WinFlash utility. See The WinFlash utility, page 17.3. On the computer, load a virtual COM port driver to emulate a serial port. Ensure that youfollow all the instructions in the topic, Configuring a PC USB port as a virtual serial port, page 24.4. In the Device Configuration screen, select Trimble SPSx8x Receiver and then select the virtualserial COM port set up in the previous steps. The following example shows COM16 is allocatedto the Trimble-USB connection:SPS985 GNSS Smart Antenna Getting Started Guide 15
5. Click Next.6. In the Operation Selection screen, select Update Receiver Options and then click Next.7. In the Upgrade Option Password Entry screen, select the Option key option and then in theOption Password field enter the password. Click Next.8. In the Settings Review screen, check that settings that you want to make and then click Finish.You can now continue to use the WinFlash utility or use the Wi-Fi and web interface to make anychanges to the settings (see below).Loading the Operating mode codeThe next task is to load the Operating Mode code into the SPS GNSS receiver. The Operating Modewill be one of the following depending on your receiver and the option you have purchased:lDGPS BaselPrecise BaselLocation RTK RoverlPrecise RTK RoverlPrecise Base/RoverlMoving Base/Heading modelHeading modeUsing the WinFlash utility1. In the Operation Selection screen, select Update Receiver Options and then click Next.2. Enter the option code and then click Next to load the option code.Using the web interface1. Log in to the web interface, select (Select Security/Login and enter the password.2. In the web interface, select (Select Receiver /Options). The Operating mode is set to Off.SPS985 GNSS Smart Antenna Getting Started Guide 16
3. Install the Operating Mode option. To do this, in the Option Code field, enter the informationprovided to you by your Trimble dealer and then click Install Option.4. You must now do a full receiver reset to set it back to the factory defaults. Hold the Powerbutton down for 30 seconds or use the web interface and select Receiver Configuration / Reset.Select Clear all receiver settings. The following screen show Precise Base and Rover modesloaded and that MovingBase/Heading mode is not loaded.Loading extra optionsAfter you have activated the receiver and loaded the Operating mode code, you can then load extraoptions you have purchased such as GLONASS.Using the WinFlash utilityIn the Operation Selection screen, select Update receiver options and then click Next.Enter theoption code and then click Next. In the Settings Review screen, click Finish.Using the web interface1. Select Receiver Status/Receiver Options.2. Install the option. To do this, in the Option Code field, enter the password provided to you byyour Trimble dealer and then click Install Option.The WinFlash utilityThe WinFlash utility communicates with Trimble products to perform various functions including:SPS985 GNSS Smart Antenna Getting Started Guide 17
linstalling software, firmware, and option upgradeslrunning diagnostics (for example, retrieving configuration information)lconfiguring radiosNote – The WinFlash utility runs on Windows 2000, XP, Windows Vista®, and Windows 7 operatingsystems.Installing the WinFlash utilityYou can download and install the WinFlash utility from the Trimble website.1. Go to www.trimble.com/support.shtml#S.2. Select your product from the list.3. If necessary, click the Support tab.4. Select the Downloads link.5. Select the Latest SPS GNSSFirmware and Utilities link.6. Select the firmware that you want to download. Ensure that you select a file that contains theWinFlash utility.7. Download the ZIP file to your computer and then open it.8. Extract the files and then run the WinFlash utility.Note – If your computer or laptop only has USB ports, then you must set up a virtual serial port.See Configuring a PC USB port as a virtual serial port, page 24.The WinFlash utility guides you through the firmware upgrade process. For more information, referto the WinFlash Help.Wi-Fi SettingsThe SPS985 smart antenna is the first SPS GNSS receiver with Wi-Fi. Please take the time tounderstand its powerful capabilities.Before you use an SPS985 smart antenna, ensure that the dealer has activated it. The smartantenna, shipped from Trimble, does not have Wi-Fi or Bluetooth® wireless technology enabled.Your Trimble dealer must load the activation code before these services are available. If you need toload the Activation code yourself, see Activating your SPS GNSS Receiver, page 15.The smart antenna can be used as a Wi-Fi Access Point or a Wi-Fi Client.Access Point modeYou use this mode when the smart antenna is set up as a base station. Access Point mode enablesother Wi-Fi devices to communicate with the smart antenna without needing another Wi-Fi device.Up to five devices can simultaneously connect to the smart antenna. Devices connected to thesmart antenna in Access Point mode can communicate with each other, not just the SPS985 smartantenna. After you have connected to the smart antenna, you can use the web interface to reviewand change the settings of the smart antenna. This mode is useful if you are in the field, but do nothave a Trimble Tablet or SCS900 software.SPS985 GNSS Smart Antenna Getting Started Guide 18
In this mode, you can scan for the smart antenna from a laptop, Smartphone, or other Wi-Fienabled device, to locate the SPS985 Access Point:1. Turn on the SPS985 in Access point mode. The Wi-Fi light will flash.By default, the SPS985 is in Access point mode. If you are not sure if the SPS985 is in Accesspoint mode, you can reset it to the factory defaults by pressing the Power button for 15seconds.2. From a Wi-Fi enabled device such as a laptop, connect to the SPS985 smart antenna.On a computer running the Windows operating system, click the Network icon in the status bar. The smart antenna will be called something like "Trimble GNSS 2201". Select it and thenclick Connect.For information on how to change the wireless identification of the smart antenna, see SSIDIdentification, page 23.3. Enter the encryption key. By default, it is abcdeabcde.4. Open a web browser on your Wi-Fi enabled device and then type GNSS into the address bar.The SPS985 web interface appears. With some devices, you may need to enter eitherhttp://GNSS or 192.168.142.1 to access the web interface.On Android PDAs, Trimble recommends that you install the free Opera Mobile browser for thisfeature to work.5. Log in to the web interface. Select Security /Login. The default username is admin. The defaultpassword is password.Client modeYou use this mode when the smart antenna is set up as a rover. In this mode, the smart antenna isconnected to an Access Point. You can view the web interface of the smart antenna in Client modevia the Access Point. An Access Point on a site could be another SPS985 smart antenna or a Ciscorouter.When the smart antenna is in Client mode and is connected to an Access Point, you cannot usehttp://GNSS to communicate with the smart antenna. Instead, you need to use the applicationsBonjour (Zero Configuration Networking), UPNP, or get the IP address from the Access Point.Note – The smart antenna with internal radio has an internal Wi-Fi antenna. It is in the whiteradome on the side of the smart antenna, however the antenna gain is equal in all directions sothe base station radome does not need to point to the work area, and the rover radome does notneed to point to the base station. In the smart antenna with no internal radio, then the Wi-Fiantenna is routed to the TNC connector, so when using Wi-Fi in this receiver, it is essential to usethe supplied black whip antenna.Using the SPS985 Wi-Fi with the SCS900 softwareTo set up the SPS985 Wi-Fi to both transmit GNSS corrections (in the case of a base station) and setup a SPS985 internal Wi-Fi to receive GNSS corrections (in the case of a rover), you will need version2.91 or later of the SCS900 software. When using the SCS900 software, the SPS985 base station isautomatically configured as an Access Point and the SPS985 rover is configured as a Client.SPS985 GNSS Smart Antenna Getting Started Guide 19
The use of Wi-Fi in the smart antenna is licence free. The line-of-sight range can be greater than 300m although it is restricted if trees, machines, or buildings are between the base station and therover receiver.Setting up an SPS985 as a Wi-Fi base station without the SCS900 software1. Ensure the smart antenna has the Accuracy mode to set Base (Precise Base mode) (SelectReceiver Status /Receiver Options):2. Set the smart antenna as the Access Point. To do this, select Wi-Fi / Access point with thefollowing configuration:3. Select I/O Configuration / Port Configuration.4. Create a UDP. To do this:a. Select the Client check box (because we are sending. Clients send, Servers listen).b. Select the Output only option.c. Select the UDP Mode check box.SPS985 GNSS Smart Antenna Getting Started Guide 20
d. In the Remote IP field, enter 255.255.255.255, Port: 2101.5. Click OK. The following port information is displayed in the I/O Configuration page:Setting up an SPS985 Wi-Fi Rover without the SCS900 software1. You must have the Rover mode (Location RTK or Precise RTK ) selected.2.Set as Wi-Fi client. To do this, select Wi-Fi / Client under Client Configuration.Click Save and Reboot. The receiver is now in Client mode, which means it is not in Access Pointmode so your computer will not see an SSID (you will not be able to log in using Wi-Fi).3. Connect your computer to the SPS985 Rover web interface. To do this, either use the USB cablethat is supplied with the SPS985 smart antenna, or use Bluetooth wireless technology. To setup the PPP connection from a computer to the smart antenna, see Configuring the receiverusing a web browser and Bluetooth wireless technology (Windows 7), page 1.4. Go to the Client web interface page (see Client mode).SPS985 GNSS Smart Antenna Getting Started Guide 21
5. Under Client Configuration, select Scan For Networks. Select your Access Point from the drop-down list.6. Enter the Access Points Encryption key and click Connect:7. In the I/O page create an UDP port with the same port number as created on the base stationpreviously.SPS985 GNSS Smart Antenna Getting Started Guide 22
8. The SPS985 I/O Configuration should be as follows:SSID IdentificationAn SSID is a 32-character alphanumeric key that uniquely identifies a wireless LAN. It enables wirelessequipment such as a computer to access the Wi-Fi enabled SPS985 smart antenna.By default, the SPS receivers uses the following identification:l"Trimble GNSS NNNN" (NNNN = the last four digits of the serial number) - Rover or Rover/Baseconfigured SPS985l"Trimble Base NNNN" - Base ONLY capable SPS985By default, the password for the SSID is: abcdeabcde.For more information, see the topic called SSID Identification in the online Help.SPS985 GNSS Smart Antenna Getting Started Guide 23
Configuring a PC USB port as a virtual serial portIt is possible to use the USB interface from an SPS GNSS receiver with a software application thatrequires a serial port.For example, the Trimble WinFlash utility can be run on a computer that has no serial port byconnecting the USB cable between the computer and the receiver.Another example would allow the receiver to stream NMEA messages over a USB interface into acomputer's virtual serial port, allowing applications such as the HYDROpro software to use theNMEA messages on a computerthat has no physical serial ports.The SPS985 smart antenna has USB cable P/N 80751-HH that can be connected to the receiver. Theother end of the USB cable then connects to a computer.The receiver must be running firmware version 4.15 or later.Windows 7 Professional operating system1. The simplest way to install the Virtual Serial port for the USB interface to the SPS receivers is togo to the Trimble Support website (www.trimble.com/support) and search for the SPS GNSSreceiver you have. In the Downloads section, download the file called Windows7 USB Installerto your computer or USB drive.This file contains a Support Note and installation program.2. Run the installation program. It will load the Virtual Serial port for the USB interface on yourcomputer or USB drive.Note – If you have installed the Trimble WinFlash utility (www.trimble.com/support) on yourcomputer, then another way to install the Virtual serial port for the USB interface is to run theUSB Installer program, which is located in C:\Program Files\Common Files\Trimble\USBDriver.If this process does not work for your computer, or if you have a different Windows operatingsystem on your computer, then follow the procedure below.Windows Vista and Windows 7 operating system1. Go to the Trimble Support website (www.trimble.com/support) and search for the SPS GNSSreceiver you have. Alternatively, go to the SPS site in the Trimble Connected Community(www.myconnectedsite.com). In the Downloads section, download the file calledSPSGNSSInterface to a Virtual COMport on a Computer to your computer or USB drive.2. Open the file and place the trimble.Usb.INF file in a temporary folder on your computer ofUSBdrive.3. On the computer, select Control Panel /Device Manager.4. Click on the name of the computer and then from the Action menu, select Add Legacy Driver.5. A wizard prompts you to locate the TrimbleUsb.inf file. Locate the file and then follow theprompts in the wizard to continue.SPS985 GNSS Smart Antenna Getting Started Guide 24
Windows XP operating system1. Go to the Trimble Support website (www.trimble.com/support) and search for the SPS GNSSreceiver you have. Alternatively, go to the SPS site in the Trimble Connected Community(www.myconnectedsite.com). In the Downloads section, download the file calledSPSGNSSInterface to a Virtual COMport on a Computer to your computer or USB drive.2. Open the file and place the trimble.Usb.INF file in a temporary folder on your computer ofUSBdrive.3. Turn on the receiver and then connect the USBcable to the computer. The New Hardwarewizard appears.4. Select the No, not this time option and then click Next.5. A dialog prompts you to specify the location of the USBSer.sys file. For example,C:\Windows\System32\Drivers.6. On some computers you may need to repeat Step 4 for the TrimbleUsb.inf file.7. Check that the receiver is available for use. Go to the Device Manager menu on the computer.The receiver should appear in the Ports list.Note – If you are running an application such as the HYDROpro software on the computer and youphysically disconnect the USB cable from the computer and then reconnect it, it does not alwaysre-establish the connection. This is because opening the serial port from the application locks thedevice handle and when the USB device is disconnected, the application does not close the serialport and the device handle is still locked. On reconnecting, the USB cable is unable to get the devicehandle since it is locked. You must close the application before the reconnect to the port will work.This limitation is due to the behavior of the Microsoft USB serial driver.Logging dataData logging involves the collection of GNSS measurement data over a period of time at a staticpoint or points, and subsequent postprocessing of the information to accurately compute baselineinformation. Data logging using receivers requires access to suitable GNSS postprocessing softwaresuch as the Trimble Business Center software.Postprocessed GNSS data is typically used for control network measurement applications andprecise monitoring. GNSS measurement data is collected over a period of time at a static point orpoints and then postprocessed to accurately compute baseline information.By default, the Data Logging option is turned off. For information on how to enable the DataLogging option, and the required postprocessing software options, contact your Trimble dealer.Logging data after a power lossIf power is unexpectedly lost while the receiver is logging data, the receiver tries to return to thestate it was in immediately before the power loss. The receiver does not reset itself to defaultsettings.If the receiver was logging data when power was lost, it resumes logging data when power isrestored.SPS985 GNSS Smart Antenna Getting Started Guide 25
TroubleshootingTroubleshooting receiver issuesThis section describes some possible receiver issues, possible causes, and how to solve them. Pleaseread this section before you contact Technical Support.The receiver does not turn onPossible cause SolutionExternal power is too low. Check the charge on the external power supply, and check the fuse ifapplicable. If required, replace the battery.Internal power is too low. Do the following:lCheck the charge on the internal batteries and replace ifrequired.lEnsure battery contacts are clean.External power is not properlyconnected.Do the following:lCheck that the Lemo connection is seated properly.lCheck for broken or bent pins in the connector.Faulty external power cable. Do the following:lTry a different cable.lCheck pinouts with multimeter to ensure internal wiring isintact.The receiver is not tracking any satellitesPossible cause SolutionThe GNSS antenna does not haveclear line of sight to the sky.Ensure that the antenna has a clear line of sight.The receiver does not log dataPossible cause SolutionInsufficient memory in the internalmemory.Delete old files. Press the Power button for 30 seconds.SPS985 GNSS Smart Antenna Getting Started Guide 26
The receiver is not respondingPossible cause SolutionThe receiver needs a soft reset. Turn off the receiver and then turn it back on again. For moreinformation, see Button and LED operations, page 12The receiver needs a full reset. Press the Power button for 30 seconds. For more information, seeButton and LED operations, page 12.SPS985 GNSS Smart Antenna Getting Started Guide 27
Glossary1PPS Pulse-per-second. Used in hardware timing. A pulse is generated in conjunctionwith a time stamp. This defines the instant when the time stamp is applicable.almanac A file that contains orbit information on all the satellites, clock corrections, andatmospheric delay parameters. The almanac is transmitted by a GNSS satellite toa GNSS receiver, where it facilitates rapid acquisition of GNSS signals when youstart collecting data, or when you have lost track of satellites and are trying toregain GNSS signals.The orbit information is a subset of the ephemeris/ephemerides data.AutoBase AutoBase technology uses the position of the receiver to automatically select thecorrect base station; allowing for one button press operation of a base station. Itshortens setup time associated with repeated daily base station setups at thesame location on jobsites.base station Also called reference station. In construction, a base station is a receiver placed ata known point on a jobsite that tracks the same satellites as an RTK rover, andprovides a real-time differential correction message stream through radio to therover, to obtain centimeter level positions on a continuous real-time basis. Abase station can also be a part of a virtual reference station network, or alocation at which GNSS observations are collected over a period of time, forsubsequent postprocessing to obtain the most accurate position for the location.beacon Source of RTCM DGPS corrections transmitted from coastal reference stations inthe 283.5 to 325.0 kHz range.BINEX BInary EXchange format. BINEX is an operational binary format standard forGPS/GLONASS/SBAS research purposes. It is designed to grow and allowencapsulation of all (or most) of the information currently allowed for in a rangeof other formats.broadcast server An Internet server that manages authentication and password control for anetwork of VRS servers, and relays VRS corrections from the VRS server that youselect.carrier A radio wave having at least one characteristic (such as frequency, amplitude, orphase) that can be varied from a known reference value by modulation.carrier frequency The frequency of the unmodulated fundamental output of a radio transmitter.The GPS L1 carrier frequency is 1575.42 MHz.carrier phase Is the cumulative phase count of the GPS or GLONASS carrier signal at a giventime.cellular modems A wireless adaptor that connects a laptop computer to a cellular phone systemfor data transfer. Cellular modems, which contain their own antennas, plug into aPC Card slot or into the USB port of the computer and are available for a varietyof wireless data services such as GPRS.CMR/CMR+ Compact Measurement Record. A real-time message format developed byTrimble for broadcasting corrections to other Trimble receivers. CMR is a moreefficient alternative to RTCM.CMRx A real-time message format developed by Trimble for transmitting more satelliteSPS985 GNSS Smart Antenna Getting Started Guide 28
corrections resulting from more satellite signals, more constellations, and moresatellites. Its compactness means more repeaters can be used on a site.Compass The BeiDou Navigation System (Compass) Navigation Satellite System is a Chinesesatellite navigation system.The first BeiDou system (known as BeiDou-1), consists of three satellites and haslimited coverage and applications. It has been offering navigation services mainlyfor customers in China and from neighboring regions since 2000.The second generation of the system (known as Compass or BeiDou-2) consistsof 35 satellites. It became operational with coverage of China in December 2011with 10 satellites in use. It is planned to offer services to customers in Asia-Pacific region by 2012 and the global system should be finished by 2020.covariance A statistical measure of the variance of two random variables that are observedor measured in the same mean time period. This measure is equal to theproduct of the deviations of corresponding values of the two variables from theirrespective means.datum Also called geodetic datum. A mathematical model designed to best fit the geoid,defined by the relationship between an ellipsoid and, a point on the topographicsurface, established as the origin of the datum. World geodetic datums aretypically defined by the size and shape of an ellipsoid and the relationshipbetween the center of the ellipsoid and the center of the earth.Because the earth is not a perfect ellipsoid, any single datum will provide abetter model in some locations than in others. Therefore, various datums havebeen established to suit particular regions.For example, maps in Europe are often based on the European datum of 1950(ED-50). Maps in the United States are often based on the North Americandatum of 1927 (NAD-27) or 1983 (NAD-83).All GPS coordinates are based on the WGS-84 datum surface.deep discharge Withdrawal of all electrical energy to the end-point voltage before the cell orbattery is recharged.DGPS See real-time differential GPS.differential correction Differential correction is the process of correcting GNSS data collected on arover with data collected simultaneously at a base station. Because the basestation is on a known location, any errors in data collected at the base station canbe measured, and the necessary corrections applied to the rover data.Differential correction can be done in real-time, or after the data is collected bypostprocessing.differential GPS See real-time differential GPS.DOP Dilution of Precision. A measure of the quality of GNSS positions, based on thegeometry of the satellites used to compute the positions. When satellites arewidely spaced relative to each other, the DOP value is lower, and positionaccuracy is greater. When satellites are close together in the sky, the DOP ishigher and GNSS positions may contain a greater level of error.PDOP (Position DOP) indicates the three-dimensional geometry of the satellites.Other DOP values include HDOP (Horizontal DOP) and VDOP (Vertical DOP),SPS985 GNSS Smart Antenna Getting Started Guide 29
which indicate the accuracy of horizontal measurements (latitude and longitude)and vertical measurements respectively. PDOP is related to HDOP and VDOP asfollows: PDOP² = HDOP² + VDOP².dual-frequency GPS A type of receiver that uses both L1 and L2 signals from GPS satellites. A dual-frequency receiver can compute more precise position fixes over longerdistances and under more adverse conditions because it compensates forionospheric delays.EGNOS European Geostationary Navigation Overlay Service. A Satellite-BasedAugmentation System (SBAS) that provides a free-to-air differential correctionservice for GNSS. EGNOS is the European equivalent of WAAS, which is availablein the United States.elevation mask The angle below which the receiver will not track satellites. Normally set to 10degrees to avoid interference problems caused by buildings and trees,atmospheric issues, and multipath errors.ellipsoid An ellipsoid is the three-dimensional shape that is used as the basis formathematically modeling the earth’s surface. The ellipsoid is defined by thelengths of the minor and major axes. The earth’s minor axis is the polar axis andthe major axis is the equatorial axis.EHT Height above ellipsoid.ephemeris/ephemerides A list of predicted (accurate) positions or locations of satellites as a function oftime. A set of numerical parameters that can be used to determine a satellite’sposition. Available as broadcast ephemeris or as postprocessed preciseephemeris.epoch The measurement interval of a GNSS receiver. The epoch varies according to themeasurement type: for real-time measurement it is set at one second; forpostprocessed measurement it can be set to a rate of between one second andone minute. For example, if data is measured every 15 seconds, loading datausing 30-second epochs means loading every alternate measurement.feature A feature is a physical object or event that has a location in the real world, whichyou want to collect position and/or descriptive information (attributes) about.Features can be classified as surface or non-surface features, and again as points,lines/breaklines, or boundaries/areas.firmware The program inside the receiver that controls receiver operations and hardware.Galileo Galileo is a GNSS system built by the European Union and the European SpaceAgency. It is complimentary to GPS and GLONASS.GHT Height above geoid.GIOVE Galileo In-Orbit Validation Element. The name of each satellite for the EuropeanSpace Agency to test the Galileo positioning system.GLONASS Global Orbiting Navigation Satellite System. GLONASS is a Soviet space-basednavigation system comparable to the American GPS system. The operationalsystem consists of 21 operational and 3 non-operational satellites in 3 orbitplanes.SPS985 GNSS Smart Antenna Getting Started Guide 30
GNSS Global Navigation Satellite System.GSOF General Serial Output Format. A Trimble proprietary message format.HDOP Horizontal Dilution of Precision. HDOP is a DOP value that indicates the accuracyof horizontal measurements. Other DOP values include VDOP (vertical DOP) andPDOP (Position DOP).Using a maximum HDOP is ideal for situations where vertical precision is notparticularly important, and your position yield would be decreased by thevertical component of the PDOP (for example, if you are collecting data undercanopy).IBSS Internet Base Station Service. This Trimble service makes the setup of anInternet-capable receiver as simple as possible. The base station can beconnected to the Internet (cable or wirelessly). To access the distribution server,the user enter a password into the receiver. To use the server, the user musthave a Trimble Connected Community site license.L1 The primary L-band carrier used by GPS and GLONASS satellites to transmitsatellite data.L2 The secondary L-band carrier used by GPS and GLONASS satellites to transmitsatellite data.L2C A modernized code that allows significantly better ability to track the L2frequency.L5 The third L-band carrier used by GPS satellites to transmit satellite data. L5 willprovide a higher power level than the other carriers. As a result, acquiring andtracking weak signals will be easier.Location RTK Some applications such as vehicular-mounted site supervisor systems do notrequire Precision RTK accuracy. Location RTK is a mode in which, once initialized,the receiver will operate either in 10 cm horizontal and 10 cm vertical accuracy,or in 10 cm horizontal and and 2 cm vertical accuracy.Mountpoint Every single NTripSource needs a unique mountpoint on an NTripCaster. Beforetransmitting GNSS data to the NTripCaster, the NTripServer sends an assignmentof the mountpoint.Moving Base Moving Base is an RTK positioning technique in which both reference and roverreceivers are mobile. Corrections are sent from a “base” receiver to a “rover”receiver and the resultant baseline (vector) has centimeter-level accuracy.MSAS MTSAT Satellite-Based Augmentation System. A Satellite-Based AugmentationSystem (SBAS) that provides a free-to-air differential correction service for GNSS.MSAS is the Japanese equivalent of WAAS, which is available in the United States.multipath Interference, similar to ghosts on an analog television screen, that occurs whenGNSS signals arrive at an antenna having traversed different paths. The signaltraversing the longer path yields a larger pseudorange estimate and increasesthe error. Multiple paths can arise from reflections off the ground or offstructures near the antenna.NMEA National Marine Electronics Association. NMEA 0183 defines the standard forinterfacing marine electronic navigational devices. This standard defines aSPS985 GNSS Smart Antenna Getting Started Guide 31
number of 'strings' referred to as NMEA strings that contain navigational detailssuch as positions. Most Trimble GNSS receivers can output positions as NMEAstrings.NTrip Protocol Networked Transport of RTCM via Internet Protocol (NTrip) is an application-levelprotocol that supports streaming Global Navigation Satellite System (GNSS) dataover the Internet. NTrip is a generic, stateless protocol based on the HypertextTransfer Protocol (HTTP). The HTTP objects are extended to GNSS data streams.NTripCaster The NTripCaster is basically an HTTP server supporting a subset of HTTPrequest/response messages and adjusted to low-bandwidth streaming data. TheNTripCaster accepts request messages on a single port from either theNTripServer or the NTripClient. Depending on these messages, the NTripCasterdecides whether there is streaming data to receive or to send.Trimble NTripCaster integrates the NTripServer and the NTripCaster. This port isused only to accept requests from NTripClients.NTripClient An NTripClient will be accepted by and receive data from an NTripCaster, if theNTripClient sends the correct request message (TCP/UDP connection to thespecified NTripCaster IP and listening port).NTripServer The NTripServer is used to transfer GNSS data of an NTripSource to theNTripCaster. An NTripServer in its simplest setup is a computer program runningon a PC that sends correction data of an NTripSource (for example, as receivedthrough the serial communication port from a GNSS receiver) to the NTripCaster.The NTripServer - NTripCaster communication extends HTTP by additionalmessage formats and status codes.NTripSource The NTripSources provide continuous GNSS data (for example, RTCM-104corrections) as streaming data. A single source represents GNSS data referring toa specific location. Source description parameters are compiled in the source-table.OmniSTAR The OmniSTAR HP/XP service allows the use of new generation dual-frequencyreceivers with the OmniSTAR service. The HP/XP service does not rely on localreference stations for its signal, but utilizes a global satellite monitoring network.Additionally, while most current dual-frequency GNSS systems are accurate towithin a meter or so, OmniSTAR with XP is accurate in 3D to better than 30 cm.PDOP Position Dilution of Precision. PDOP is a DOP value that indicates the accuracy ofthree-dimensional measurements. Other DOP values include VDOP (verticalDOP) and HDOP (Horizontal Dilution of Precision).Using a maximum PDOP value is ideal for situations where both vertical andhorizontal precision are important.POE Power Over Ethernet. Provides DC power to the receiver using an Ethernetcable.postprocessing Postprocessing is the processing of satellite data after it is collected, in order toeliminate error. This involves using computer software to compare data from therover with data collected at the base station.SPS985 GNSS Smart Antenna Getting Started Guide 32
QZSS Quasi-Zenith Satellite System. A Japanese regional GNSS eventually consisting ofthree geosynchronous satellites over Japan.real-time differentialGPSAlso known as real-time differential correction or DGPS. Real-time differentialGPS is the process of correcting GPS data as you collect it. Corrections arecalculated at a base station and then sent to the receiver through a radio link. Asthe rover receives the position it applies the corrections to give you a veryaccurate position in the field.Most real-time differential correction methods apply corrections to code phasepositions.While DGPS is a generic term, its common interpretation is that it entails the useof single-frequency code phase data sent from a GNSS base station to a roverGNSS receiver to provide sub-meter position accuracy. The rover receiver canbe at a long range (greater than 100 kms (62 miles)) from the base station.rover A rover is any mobile GNSS receiver that is used to collect or update data in thefield, typically at an unknown location.Roving mode Roving mode applies to the use of a rover receiver to collect data, stakeout, orcontrol earthmoving machinery in real time using RTK techniques.RTCM Radio Technical Commission for Maritime Services. A commission established todefine a differential data link for the real-time differential correction of rovingGNSS receivers. There are three versions of RTCM correction messages. AllTrimble GNSS receivers use Version 2 protocol for single-frequency DGPS typecorrections. Carrier phase corrections are available on Version 2, or on thenewer Version 3 RTCM protocol, which is available on certain Trimble dual-frequency receivers. The Version 3 RTCM protocol is more compact but is not aswidely supported as Version 2.RTK real-time kinematic. A real-time differential GPS method that uses carrier phasemeasurements for greater accuracy.SBAS Satellite-Based Augmentation System. SBAS is based on differential GPS, butapplies to wide area (WAAS/EGNOS/MSAS) networks of reference stations.Corrections and additional information are broadcast using geostationarysatellites.signal-to-noise ratio SNR. The signal strength of a satellite is a measure of the information content ofthe signal, relative to the signal’s noise. The typical SNR of a satellite at 30°elevation is between 47 and 50 dBHz.skyplot The satellite skyplot confirms reception of a differentially corrected GNSS signaland displays the number of satellites tracked by the GNSS receiver, as well astheir relative positions.SNR See signal-to-noise ratio.Source-table The NTripCaster maintains a source-table containing information on availableNTripSources, networks of NTripSources, and NTripCasters, to be sent to anNTripClient on request. Source-table records are dedicated to one of thefollowing:SPS985 GNSS Smart Antenna Getting Started Guide 33
ldata STReams (record type STR)lCASters (record type CAS)lNETworks of data streams (record type NET)All NTripClients must be able to decode record type STR. Decoding types CAS andNET is an optional feature. All data fields in the source-table records areseparated using the semicolon character.triple frequency GPS A type of receiver that uses three carrier phase measurements (L1,L2, and L5).UTC Universal Time Coordinated. A time standard based on local solar mean time atthe Greenwich meridian.VRS Virtual Reference Station. A VRS system consists of GNSS hardware, software,and communication links. It uses data from a network of base stations to providecorrections to each rover that are more accurate than corrections from a singlebase station.To start using VRS corrections, the rover sends its position to the VRS server. TheVRS server uses the base station data to model systematic errors (such asionospheric noise) at the rover position. It then sends RTCM correction messagesback to the rover.WAAS Wide Area Augmentation System. WAAS was established by the Federal AviationAdministration (FAA) for flight and approach navigation for civil aviation. WAASimproves the accuracy and availability of the basic GNSS signals over its coveragearea, which includes the continental United States and outlying parts of Canadaand Mexico.The WAAS system provides correction data for visible satellites. Corrections arecomputed from ground station observations and then uploaded to twogeostationary satellites. This data is then broadcast on the L1 frequency, and istracked using a channel on the GNSS receiver, exactly like a GNSS satellite.Use WAAS when other correction sources are unavailable, to obtain greateraccuracy than autonomous positions. For more information on WAAS, refer tothe FAA website at http://gps.faa.gov.The EGNOS service is the European equivalent and MSAS is the Japaneseequivalent of WAAS.WGS-84 World Geodetic System 1984. Since January 1987, WGS-84 has supersededWGS-72 as the datum used by GPS.The WGS-84 datum is based on the ellipsoid of the same name.SPS985 GNSS Smart Antenna Getting Started Guide 34

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