Garmin 0126000 LICENSED NON-BROADCAST BASE STATION TRANSMITTER User Manual

Garmin International Inc LICENSED NON-BROADCAST BASE STATION TRANSMITTER

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User Manual

PRELIMINARYGarmin G5000™ Pilot’s Guide (Preliminary)335HAZARD AVOIDANCEPRELIMINARY GARMIN G5000™ PILOT’S GUIDE INCLUDING THE GARMIN GWX 70 AIRBORNE COLOR WEATHER RADARThe following contents have been extracted from a draft Garmin G5000 Pilot’s Guide. This excerpt describes pilot operation of the Garmin GWX 70 Airborne Color Weather Radar. This information is preliminary and is subject to change.GWX 70 Prelim.indd 335 7/25/2012 3:14:44 PM
PRELIMINARYGarmin G5000™ Pilot’s Guide (Preliminary)336HAZARD AVOIDANCE6.3 AIRBORNE COLOR WEATHER RADARSYSTEM DESCRIPTIONThe Garmin GWX 70 Airborne Color Weather Radar is a solid-state doppler radar with forty watts of output power. It combines excellent range and adjustable scanning profiles with high-definition target displays. The effective pulse length is 27.31 microseconds (µs), and the system optimizes the pulse length to maximize resolution at each range setting. This reduces the targets smearing together on the displays for better target definition at close range.The aircraft uses a phased array antenna that is fully stabilized to accommodate 30º of pitch and roll.To focus radar scanning on specific areas, Sector Scanning offers pilot-adjustable horizontal scan angles of 20º, 40º, 60º, or 90º. A vertical scanning function helps to analyze storm tops, gradients, and cell buildup activity at various altitudes.Radar features include:•ExtendedSensitivityTimeConstant(STC)logicthatautomaticallycorrelatesdistanceofthereturnechowithintensity, so cells do not suddenly appear to get larger as they get closer.•TurbulenceDetectionpresentsareasofturbulenceassociatedwithprecipitationusingthecolormagenta.•WATCH®(WeatherATtenuatedColorHighlight)helpsidentifypossibleshadowingeffectsofshort-rangecellactivity, identifying areas where radar return signals are weakened or attenuated by intense precipitation (or large areas of lesser precipitation) and may not fully reflect the weather behind a storm.•WeatherAlertthatlooksaheadforintensecellactivityinthe80-320nmrange,eveniftheserangesarenotbeing monitored.•Altitude-CompensatedTilt(ACT)managementwhichautomaticallyadjuststheantennatiltastheaircraftaltitude changes.•GroundClutterSuppression(GCS)removesgroundclutterfromthedisplays.PRINCIPLES OF AIRBORNE WEATHER RADARThetermRADARisanacronymforRAdioDetectingAndRanging.Pulsedradarlocatestargetsbytransmittinga microwave pulse beam that, upon encountering a target, is reflected back to the radar receiver as a return echo. The microwave pulses are focused and radiated by the antenna, with the most intense energy in the center of the beam and decreasing intensity near the edge. The same antenna is used for both transmitting and receiving.Radar detection is a two-way process that requires 12.36 µs for the transmitted microwave pulses to travel out and back for each nautical mile of target range. It takes 123.6 µs for a transmitted pulse to make the round trip if a target is ten nautical miles away.The GWX 70, has the capability to detect the velocity of precipitation moving toward or away from the radar antenna. As the radar pulse beam strikes a moving object, the frequency of the returned echo shifts in relation to the speed at which the object is moving. This effect is analogous to the audibile pitch change observed when anemergencyvehicle’ssirengetscloserandthenmovesfurtheraway.Dopplerradaremploysthiseffecttodetect areas of precipitation moving at a high rate of speed (indicative of turbulence), and to determine when an object, such as the ground, is stationary. This information can be used to suppress ground clutter.Airborne weather radar should be used to avoid severe weather, not for penetrating severe weather. The decision to fly into an area of radar targets depends on target intensity, spacing between the targets, aircraft GWX 70 Prelim.indd 336 7/25/2012 3:14:44 PM
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Document ID1760200
Application IDH6pdUIbIDmGcqLTLrnZJKA==
Document DescriptionUser Manual
Short Term ConfidentialNo
Permanent ConfidentialNo
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Document TypeUser Manual
Display FormatAdobe Acrobat PDF - pdf
Filesize134.42kB (1680275 bits)
Date Submitted2012-08-06 00:00:00
Date Available2012-09-20 00:00:00
Creation Date2012-07-25 15:14:44
Producing SoftwareAdobe PDF Library 9.9
Document Lastmod2012-07-25 15:14:48
Document TitleUser Manual
Document CreatorAdobe InDesign CS5 (7.0.4)
FCC ID Filing: IPH-0126000

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