Vector Sensor Reference Manual 109
8 to 15
16 to 23
24 to 31
AlmVFlag Almanac valid flag Byte 1 0 = not logged
1 = invalid
2 = valid
3 = has data
(not yet
validated)
AlmHealth Almanac health from sub frame 4 of
the GPS message
Byte 1 See ICD-GPS-
200
Elev Elevation angle in degrees Char 1 -90 to 90
Azimuth ½ the azimuth in degrees Byte 1 0 to 180
represents
360 degrees
7.1.10 Bin 99
This message has a BlockID of 99 and is 304 bytes excluding the header and epilogue. This
message contains quantities related to the tracking of the individual GPS satellites along with some
other relevant data. The following table describes the constituents of this message in order.
Table 7-11 Bin 99 Message
Name Components Type Bytes Value
NavMode2 Navigation mode data
(lower 3 bits hold the
GPS mode, upper bit set
if differential is available).
Byte 1 Lower 3 bits:
0 = time not valid
1 = no fix
2 = 2D fix
3 = 3D fix
Upper bit (bit 7) is 1 if
differential is available
UTCTimeDiff Whole seconds between
UTC and GPS time (GPS
minus UTC)
Byte 1 Positive
GPSWeek GPS week associated
with this message
Unsigned
short
2 0 to 65536
GPSTimeOfWeek GPS tow (sec) associated
with this message
Double 8 0.0 to 604800.0
ChannelData 12 structures (see
below) containing
tracking data for each of
the 12 receiver channels
Structure
array
12 x
24 =
288
See following table
ClockErrAtL1 The clock error of the
GPS clock oscillator at L1
frequency in Hz
Short 2 -32768 to 32768
Spare Not used at this time Unsigned
short
2 Future use