ashtech HDS800, Справочное руководство

Страница: 612 / 678

596
Data Output
NOTES:
1. The specifics of the MPC message content in relation to
$PASHS,PGS are detailed in the table below.
23: Code and/or carrier phase measured, navigation
message was obtained and measurement was used to
compute position but position wasn’t finally computed.
24: Code and/or carrier phase measured, navigation
message was obtained, measurement was used to
compute position and position was computed success-
fully.
Other state: measurement was not used to compute
position.
Unsigned char 1
Polarity of the phase tracking
0: Polarity unknown
5: Polarity known
Unsigned char 1 Signal-to-noise ratio for satellite observation (db.Hz)
Unsigned char 1 Always 0. Not used.
Double 8 Full carrier phase measurements in cycles
Double 8
Raw range to SV (in seconds),
i.e. receive time - raw range = transit time
See NOTE 1 below.
Long 4
Doppler (10
-4
Hz)
Long 4
Smoothing
Bits 0-22: magnitude of smooth correction in centime-
ters
Bit 23: sign of smooth correction
Bits 24-31: smooth count, unsigned, as follows:
0=unsmoothed
1=least smoothed
255=most smoothed
29
L1 block , same format as C/A code data block (see
NOTE 2 below)
29
L2 block , same format as C/A code data block (see
NOTE 3 below)
Unsigned char 1 Checksum, a bytewise exclusive OR (XOR)
Total of bytes 95
PGS,GPS PGS,GLO
Sequence Tag
Refers to GPS time for GPS satellites and GLONASS
time for GLONASSS satellites, in spite of the setting you
make with $PASHS,PGS.
Raw Range for GPS
Satellites
Actual pseudo-range
Actual pseudo-range
– UTC offset
Type Size Contents