System Description
SystemDescriptionandInstallationManualforRangeFinder ICD10000‐01
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PressureAltitude
ByteOffset ByteName FieldDescription
06 PA0 PA0 PA1 PressureAltitude
07 PA1 0x01
0x02
0xFF
0x80
0x40
0xEC
0xF7
0x00
8000Feet
18,525Feet
‐225Feet
Dataisinvalid
PressureAltitude
Thedataissentinthefollowingformat:
Sddddddddddddddd
TheSbitindicateswhetherthedataispositiveornegative.IftheSbitissetto“ONE”thenthedatais
negative,ifsetto“ZERO”thenthedataispositive.ThePressurealtitudeissentinfeetwitha
resolutionof25feet.
Avalueof0x8000(‐32768decimal)indicatesPressureAltitudeisinvalid.
Note:PressureAltitudeisin2'scomplementformat.
Note:PressureAltitudeisrelativetoastandardpressureof1013.25millibars(29.92inHg).
GroundTrackandAngle
ByteOffset ByteName FieldDescription
08 GT0 GT0 GroundTrackStatus&Angle
0x21
0x3C
0x3F
0x00
11.25Degrees,datavalid
315.0Degrees,datavalid
348.75Degrees,datavalid
0degrees,datainvalid
GroundTrackStatus&Angle
Thisbyteconsistsofthefollowinginformation:
Bit Definition
0‐4
5
6‐7
GroundTrackAngle
GroundTrackStatus
Reserved
GroundTrackAngleisencodedasanunsignedangularweightedbinarynumeral,withanMSBof180
degreesandanLSBof360/32degrees,withZERO(0)indicatingtruenorth.
GroundTrackStatusspecifiesthevalidityoftheGroundTrackAngleandGroundSpeedvalues.Coding
forthisfieldisasfollows:0=notvalidand1=valid.