Table of Contents
1.0INTRODUCTION
1.1PurposeofThisDocument
1.2SummaryofGPSSystemOperationalCharacteristics
1.3BriefDescriptionoftheSystem
1.3.1GPSSensorFunctions
1.3.2ControlandDisplayFunctions
1.3.3ControlandDisplayUnit(CDU)orAlternate
Control/DisplayFunctions
1.3.4GPSSensor
1.3.5Antenna/Preamplifier/Filter
1.4Interchangeability
1.5RegulatoryApproval
1.6Reliability
1.7TestabilityandMaintainability
2.0INTERCHANGEABILITYSTANDARDS
2.1Introduction
2.22MCUPackageConfiguration
2.2.1AlternatePackageConfiguration
2.2.2AntennaFormFactor
2.3StandardizedSignalling
2.4StandardInterwiring
2.5PowerCircuitry
2.5.1General
2.5.2GPSSensorPowerCircuitry
2.6EnvironmentalConditions
3.0GPSSENSORSYSTEMDESIGN
3.1General
3.2SystemApplication
3.3GeneralSystemCapabilities
3.4SpecificSystemCapabilities
3.4.1AcquisitionTime
3.4.2DegradedPerformance
3.4.3BIT
3.4.4Self-Test
4.0GPSSENSORDESIGN
4.1Integrity
4.2Modes
4.2.1NormalAcquisition
4.2.2AbnormalAcquisition
4.2.3Navigation
4.2.4AltitudeAiding
4.2.5Direction/SpeedAiding
4.2.6DifferentialGPS
4.3SystemInterfaces
4.3.1DigitalDataInputs
4.3.1.1InitializationInputs
4.3.1.2InertialInputs(704,738,561)
4.3.1.3ADCInputs
4.3.1.4MagneticCompassInput
4.3.1.5GPSIntegrityInput
4.3.1.6GPSDifferentialInput
4.3.2DigitalDataOutputs
4.3.2.1GPSMeasurementStatus(060)
4.3.2.2SSMOperation
4.3.2.2.1FailWarning
4.3.2.2.2NoComputedData
4.3.2.2.3ValidOperation
4.3.3DiscreteInputs
4.3.4DiscreteOutputs
4.3.4.1TimeMarkOutput
4.3.5Power
4.3.5.12MCUPowerConfiguration
4.3.5.2AlternatePowerConfiguration
4.4SensorPerformance(2MCUConfiguration)
4.4.1AcquisitionSensitivity(2MCUConfiguration)
4.4.2TrackingSensitivity(2MCUConfiguration)
4.4.3In-BandCWSignalRejection(2MCUConfiguration)
4.4.4Out-of-BandCWSignalRejection(2MCUConfiguration)
4.4.5BurnoutProtection(2MCUConfiguration)
4.4.6SensorNoiseFigure(2MCUConfiguration)
4.4.7SensorRFInterface(2MCUConfiguration)
4.4.7.1Connector(2MCUConfiguration)
4.4.7.2SensorInputImpedance(2MCUConfiguration)
4.4.7.3SourceImpedanceandStability(2MCUConfiguration)
4.4.7.4PreamplifierPower(2MCUConfiguration)
4.5SensorPerformance(AlternateConfiguration)
4.5.1AcquisitionSensitivity(AlternateConfiguration)
4.5.2TrackingSensitivity(AlternateConfiguration)
4.5.3In-BandCWSignalRejection(AlternateConfiguration)
4.5.4BurnoutProtection(AlternateConfiguration)
4.5.5SensorRFInterface(AlternateConfiguration)
4.5.5.1Connector(AlternateConfiguration)
4.5.5.2SensorInputImpedance(AlternateConfiguration)
4.5.5.3SourceImpedanceandStability(Alternate
Configuration)
5.0INTEGRATEDANTENNA/PREAMPLIFIER/FILTERDESIGN
5.1AntennaRequirements
5.1.1OperatingFrequency
5.1.2RadiationPattern,PolarizationandAxialRatio
5.1.3RainandDe-IcingFluidSusceptibility
5.1.4PrecipitationStatic
5.2PreamplifierAssemblyPerformance
5.3Antenna/Preamplifier/FilterRequirements
5.3.1Antenna/PreamplifierCarrierandNoiseRequirements
5.3.2PreamplifierGainCompression
5.3.3PreamplifierSelectivity
5.3.4ImpedanceandVSWR
5.3.5PreamplifierStability
5.3.6BurnoutProtection
5.3.7PreamplifierBias
5.4PhysicalCharacteristics
5.4.1Size,WeightandConnector
5.4.2Installation
5.4.3CoaxInterface Abstract
Provides design guidance for the development of GPS sensors for airline use. It describes the operational capability of the GPS receiver and the standards necessary to ensure interchangeability. GPS provides navigation data to pilots and provides data for use by other aircraft systems.
