ashtech GG Surveyor Reference Manual page 179

Table 6.72 outlines the response structure for Extended Reference Station Parameters
(Type 22):
Example:
Table 6.73 defines the response format for a typical RTCM type 22 message.
Command/Response Formats
Table 6.72: $GPMSG Structure for RTCM Message Type 22
Field
d1 RTCM type, 22
d2 Station identifier, 0000 to 1023
f1 Z count in seconds and tenths, 0000.0 to 3600.0
d3 Sequence number, 0 to 7
d4 Station health, 0 to 7
d5 Total number of characters after the time item, 000 to 999
m1 current GPS system time of position computation in
hours, minutes and seconds
f1 L1 ECEF DELTA-X (meters)
f2 L1 ECEF DELTA-Y (meters)
f3 L1 ECEF DELTA-Z (meters)
f4 Antenna L1 phase center height (meters)
*cc Message checksum in hexadecimal
$GPMSG,22,0000,1717.2,2,0,045,202908.50,+0.000664,+0.004180,-
0.002461,+0.000000*69
Table 6.73: $GPMSG Response for RTCM Message Type 22
Item
22 RTCM type
0000 Station ID
1717.2 Z count in seconds and tenths
2 Sequence number
0 Station health
045 Total number of characters after the time item
202908.50 Current UTC time of position calculation in
hours, minutes, and seconds
Description
Description
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