ashtech DG14, Reference Manual

Page: 215 / 390

Raw Data Commands 195
Raw Dat
a Commands
$PASHR,GGB
This message is not output unless the receiver is tracking at least one satellite. The
GGB message contains some of the same measurement information as is
contained in the GGB message: doppler, raw pseudo-range, full carrier phase,
satellite PRN number, elevation, and azimuth. A separate MCA message is output
for each satellite being tracked. The structure of the message is in the format:
$PASHR,GGB,<Ashtech type 3 data checksum>
Table 7.6 outlines the data string format.
MBN: Raw Measurements (Ashtech Type 2 Data Structure)
$PASHS,RAW,MBN,c1,s2,[f1]
This command enables or disables the measurement data (MBN) messages with
Ashtech Type 2 data structure, where c1 is port A, B or C (optional port), s2 is ON
or OFF, and f1 is the optional numeric output interval setting supporting a range of
0.05 to 999 seconds, depending on the measurement update rate option installed.
Table 7.6. $PASHR,GGB Data String
Binary
Type
Name Description
Char cHour UTC Hour
Char cMin UTC Minute
Float fSec UTC Second
Double dLatitude Latitude in radians
Double dLongitude Longitude in radians
Char cQuality GPS quality indicator: 0=no pos, 1=Raw pos, 2=Differential/Float, 3=Fixed
Char cSatNum Number of satellites used
Float fHDOP Horizontal dilution of precision (HDOP)
Float fHeigh Antenna height in meters above geoid
Float fGeoInd Geoidal undulation in meters. the difference between the WGS-84 earth
ellipsoid and mean-sea-level (geoid), "-" = mean-sea-level below ellipsoid
Float fDifAge Age of differential data (seconds)
long sId Differential reference station ID 1 to 1023
short sCS 2 bytes sum from cHour to sCS (exclude sCS itself)