ashtech GG Surveyor, Reference Manual

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180 GG Surveyor GPS+GLONASS Reference Manual
where Table 6.91 outlines the response message format:
Table 6.91: RTC Response Message Structure
Field Description
STATUS:
SYNC Indicates with an * that synchronization between base and remote has been established.
Valid only for REMOTE mode.
TYPE Indicates type of message being sent (base) or received (remote).
STID Displays the station ID or received from the base station.
STHE Displays the station health or received from the base station.
AGE In BASE mode, displays the elapsed time in seconds between the beginning of the
transmission of Type 1 or 9 messages. In REMOTE mode, displays the age of the
received messages in seconds.
QA Displays the communication quality factor between base and remote.
•
Defined as 100 x number of good messages/total number of messages
Valid for REMOTE mode only.
OFFSET: Displays the number of bits from the beginning of the RTCM byte (in case of a bit
slippage).
SETUP:
MODE:OFF Displays differential mode either base (BAS), remote (REM) or disabled (OFF).
PORT:A Displays port used to send or receive RTCM corrections.
AUT:N Displays auto differential mode. Default is N. Used only in REMOTE mode.
SPD:0300 RTCM bit rate. The number of bits per second sent to the differential serial port. Used
only in BASE mode.
STI:0000 User-supplied station ID. Default is 0000.
STH:0 User-set reference station health. Default is 0. Used only in BASE mode.
MAX:0060 Maximum age, in seconds, allowed for a message to be used to compute a
differentially corrected position. Default is 60. Used only in REMOTE mode.
QAF:100 The criteria to be applied when evaluating the quality of communication between base
and remote. Used in computing QA. Default is 100. Used only in REMOTE mode.
SEQ:N Indicates if there is a check for sequential received message number for the message to
be accepted. Default is N. Used only in REMOTE mode.
TYP Indicates the RTCM message types the receiver can generate. Messages available are
1, 3, 6, 9, 16, 31, 32, 6G, 34, and 36. Message 2 is not generated. Used only in BASE
mode.