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LastSubFrame
EphmVFlag
EphmHealth
AlmVFlag
AlmHealth
Elev
Azimuth
URA
Spare
CliForSNR
DiffCorr
PosResid
VelResid
DoppHZ
NCOHz
SXBlue GPS Reference Manual
Last sub frame processed in
the GPS message
Ephemeris valid flag
Satellite health from sub frame
1 of the GPS message
Almanac valid flag
Almanac health from sub
frame 4 of the GPS message
Elevation angle in degrees
½ the azimuth in degrees
User range error from sub
frame 1 of the GPS message
Not used at this time
Code lock indicator for SNR.
SNR = 10.0 * 4096 CliForSNR/
Nose_floor) where Nose_floor
= 80000.0
100 times the differential
correction for this channel's
pseudorange
10 times the position residual
from the GPS solution for this
channel
10 times the velocity residual
from the GPS solution for this
channel
Expected Doppler for this
channel in Hz
Carrier track offset for this
channel in Hz
Byte
1
Byte
1
Byte
1
Byte
1
Byte
1
Char
1
Byte
1
Byte
1
Byte
1
Unsigned
2
short
2
Short
Short
2
Short
2
Short
2
Short
2
1 to 5
0 = not logged
1 = invalid
2 = valid
3 = has data (not
yet validated)
See ICD-GPS-200
0 = not logged
1 = invalid
2 = valid
3 = has data (not
yet validated)
See ICD-GPS-200
-90 to 90
0 to 180
represents 0 to
360 degrees
See ICD-GPS-200
Future use
Positive
73
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Troubleshooting
