Radome | Honeywell 880 guide

PRIMUSr 880 Digital Weather Radar System

RADOME

Ice or water on the radome does not generally cause radar failure, but it hampers operation. The radome is constructed of materials that pass the radar energy with little attenuation. Ice or water increases the attenuation making the radar appear to have less sensitivity. Ice can cause refractive distortion, a condition characterized by loss of image definition. If the ice should cause reverberant echoes within the radome, the condition might be indicated by the appearance of nonexisting targets.

The radome can also cause refractive distortion, which would make it appear that the TILT control was out of adjustment, or that bearing indications were somewhat erroneous.

A radome with ice or water trapped within its walls can cause significant attenuation and distortion of the radar signals. This type of attenuation cannot be detected by the radar, even with REACT on, but it can, in extreme cases, cause blind spots. If a target changes significantly in size, shape, or intensity as aircraft heading or attitude change, the radome is probably the cause.

Radar Facts	A28- 1146- 102- 00
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Honeywell 880 manual Radome

Contents

Page PRIMUSr 880 Digital Weather Radar System Pilot’s Guide Table of Contents Appendices Federal Aviation Administration FAA Section Radar FactsMaximum Permissible Exposure Level Honeywell Product Support Enhanced GROUND--PROXIMITY Warning Federal Aviation Administration FAA Advisory CircularsList of Illustrations Radar Beam Illumination High Altitude Rain Coming From Unseen Dry Hail List of Tables Introduction A28- 1146- 102 System Configurations PRIMUSâ 880 Configurations Efis only Configuration Dual Control Mode Truth Table Left Right Controller Left Side Right SideRTA Mode Primusr 880 Weather Radar Equipment List Model Unit Cockpit Mounted OptionsRemote Mounted Equipment Typical PRIMUSâ 880 Weather Radar Components Typical PRIMUSâ 880 Digital Weather Radar Display WI- 880 Weather Radar Indicator OperationOperating Controls Range 3 Gmap Calibrated Gain Rainfall Rate Color In/hr Mm/hr Rainfall Rate Color Coding Fsby Forced Standby TGT Target Selected Range Minimum Target Target Range Depth NM STB Stabilization TRB Turbulence RangeAZ Azimuth SCT Scan Sector BRT Brightness or BRT/LSS Lightning Sensor System Tilt Gain WC- 880 Weather Radar Controller Configurations WC- 880 Weather Radar Controller Operation Tilt Radar SLV LSS Gain Radar EFIS/MFD PRIMUSr 880 Digital Weather Radar System Maximum Permissible Exposure Level Mpel Sect Scan Sector TRB Turbulence Detection Range SLV Slave LSS Lightning Sensor System Option TGT Target Alert WC- 884 Weather Radar Controller OperationWC- 884 Weather Radar Controller BRT Brightness RCT Rain Echo Attenuation Compensation Technique Tilt Mode Rainfall Rate Color In/hr Mm/hr PRIMUSr 880 Digital Weather Radar System Hidden Modes Forced Standby Override Roll Offset Roll GainPitch Offset Pitch Gain PRIMUSr 880 Digital Weather Radar System Preliminary Control Settings Step ProcedurePrimusr 880 Power--Up Procedure Cont Normal Operation Indicator Test Pattern 120 Scan WX With Text Fault Enabled Output Power is Radiated in Test ModePRIMUSâ 880 Power- Up Procedure Efis Test Pattern Typical 120 Scan Shown WX 319 Standby Radar Mode WeatherWI--880 Indicator Test Pattern With Text Fault Enabled REV Radar Mode Ground Mapping Test Mode 4-8 blank Radar Facts Radar Operation Aircraft Heading PRIMUSr 880 Digital Weather Radar System Sea Returns Tilt Management Radar Beam Illumination High Altitude Inch Radiator Radar Beam Illumination Low Altitude Inch Radiator PRIMUSr 880 Digital Weather Radar System Range Scale Line Tilt Limited Ideal Tilt Angle Earth’s Curvature Convective Thunderstorms Unaltered Tilt Proper Tilt Technique Tilt Management With Heading Changes Fast Developing Thunderstorm Low Altitude Tilt Management Antenna Size and Impact on Tilt Management Rules of Thumb Altitude Compensated Tilt ACT Manual Tilt at Low Altitudes Stabilization Dynamic ErrorAccelerative Error Pitch and Roll Trim Adjustments Pitch and Roll Trim Adjustments Criteria Level Flight Stabilization Check Stabilization In Straight and Level Flight Check ProcedureStabilization Precheck Symmetrical Ground Returns Ground Return Indicating Misalignment Upper Right Roll Stabilization Check Stabilization in Turns Check ProcedureGround Return Indicating Misalignment Upper Left Roll Stabilization Inoperative In- flight Roll Offset Adjustment Procedure 23. The radar unit is in the roll offset Push the Stab STB button to go to the next menu pitch offset Roll Offset Adjustment Display Final Pitch Offset Adjustment Pitch Offset Adjustment Procedure Roll Gain Adjustment Roll Gain Adjustment Pitch Gain Adjustment Pitch Gain Adjustment Interpreting Weather Radar Images Weather Radar Images PRIMUSr 880 Digital Weather Radar System Radar and Visual Cloud Mass Squall Line Weather Display Calibration Display Levels Related to VIP Levels Typical Rain Echo Attenuation Compensation Technique React LOW Variable Gain Settings can Eliminate Hazardous TargetsVariable Gain Control PRIMUSr 880 Digital Weather Radar System React on and OFF Indications With React SelectedReact Do not FLY Into the Shadow Behind the Cell ShadowingTurbulence Probability Probability of Turbulence Presence A Weather Target Turbulence Detection Theory Areas of Turbulence can not Always be Detected by the Radar Total Return Vector No Turbulence Weather Display With Turbulence Turbulence Detection OperationTurbulent PRIMUSâ 880 Digital Weather Radar can only Detect Hail Size Probability Turbulence Levels From Airman’s Information Manual Spotting Hail Hail Size Probability Rain Coming From Unseen Dry Hail Familiar Hailstorm Patterns Overshooting a Storm Short- and Long- Blind Alley Azimuth Resolution Azimuth Resolution in Weather Modes Radome Weather Avoidance Weather Display Do not Leave the Radar in Variable GAIN. SIG Nificant Weather MAY not be DisplayedDRY Hail can be Prevalent AT Higher Alti Tudes WITHIN, NEAR, or Above Storm Cells Severe Weather Avoidance Procedures 10 3. Interaction With Other Storms. a thunderstorm that is Step Procedure Configurations of Individual Echoes Northern Hemisphere Storms Situated Behind Intervening RainFall MAY be More Severe than Depicted on Display Typical Hook Pattern Avoid V- Notch by 20 Miles Notch Echo, Pendant Shape Avoid Pendant by 20 Miles Classic Pendant Shape Avoid ALL Crescent Shaped Echoes by 20 Miles Avoid Steep Rain Gradients by 20 MilesRain Gradients Line Configurations Crescent Shape Avoid Line Echo Wave Patterns Lewp by 20 Miles Line Echo Wave Pattern Lewp Avoid BOW- Shaped Line of Echoes by 20 Miles Bow- Shaped Line of Thunderstorms Turbulence Versus Distance from Storm Edge Additional HazardsTurbulence Versus Distance from Storm Core Ground Mapping Ground Mapping Display Tilt Setting for Maximal Ground Target Display Inch Radiator Range Scale Maximum Permissible Exposure Level Mpel Mpel Boundary In- Flight Troubleshooting Test Mode With Text Faults Enabled Fault Data Fields Field No Description 315 Fault Code and Text Fault Relationships Text Faults Cont IO Fpga REG Text Faults Describes the pilot messages Pilot Messages Honeywell Product Support Customer Response Center CRC Customer SupportHoneywell Aerospace Online Technical Publications Web Site Abbreviations Abbreviation Equivalent FLTPLN, FP RCT, React Federal Aviation Administration FAA Advisory Circulars CancellationAppendix a Purpose Body Damage Background PrecautionsGeneral Combustible Materials Subject Thunderstorms GeneralHazards Squall Lines Tornadoes Turbulence Schematic Cross Section of a Thunderstorm Icing Effect on Altimeters HailLOW Ceiling and Visibility Lightning Weather Radar DO’S and DON’TS of Thunderstorm Flying PRIMUSr 880 Digital Weather Radar System Relationship Between Turbulence and Reflectivity Relationship Between Turbulence and AltitudeTurbulence and Echo Intensity on NWS Radar WSR Turbulence in Relation to Distance from Storm Core Turbulence below Cloud Base Turbulence in Relation to Distance from the Storm EdgeTurbulence Above Storm Tops Maximum Storm Tops Hail in Thunderstorms Extrapolation to Different Climbs USE of Airborne Radar Enhanced Ground-Proximity Warning System Egpws Appendix BSystem Operation Egpws Controls Push Button Controls Annunciators Related Egpws System Operation Egpws Operation Egpws Display Figure B--1 Egpws Test Index Index TGT target, 3-6 tilt TRB turbulence Radar facts cont rain echo attenuation Index--5 BRT brightness or BRT/LSS lightning sensor system