ashtech GG Surveyor, Reference Manual

Page: 163 / 256

Command/Response Formats 145
Com
m
and
s
Example:
$GLGSN,04,38,040,46,056,53,025,40,033,999*BA
Table 6.57 outlines the GLGSN response message.
GST: Position Error
$PASHS,NME,GST,x,c
Enables/disables the GST message where x is the serial port, and c is ON or OFF. The
GST message provides a real time estimate (1 sigma) of the position error. The GST
message is output only if the position is computed.
Example: Enable GST message on port C
$PASHS,NME,GST,C,ON
16 PRN number of the third GPS satellite
021 Signal strength of the third GPS satellite
999 Termination with no RTCM information
7D Message checksum in hexadecimal
Table 6.57: Typical GLGSN Response Message
Item Significance
$GLGSN Header
04 Number of locked satellites
38 ID number of the first GLONASS satellite
040 Signal strength of the first GLONASS satellite
46 ID number of the second GLONASS satellite
056 Signal strength of the second GLONASS satellite
53 ID number of the third GLONASS satellite
025 Signal strength of the third GLONASS satellite
40 ID number of the fourth GLONASS satellite
033 Signal strength of the fourth GLONASS satellite
999 Termination with no RTCM information
BA Message checksum in hexadecimal
Table 6.56: Typical GPGSN Response Message (continued)
Field Significance