4
Operation
GPS/GLONASS Receiver User Manual Rev 1
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Syntax
log [port],datatype,[trigger],[period],[offset],[hold]
Example:
log com1,posa,ontime,60,1
If the LOG syntax does not include a trigger type, it will be output only once following execution of the LOG
command. If trigger type is specified in the LOG syntax, the log will continue to be output based on the trigger
specification. Specific logs can be disabled using the UNLOG command, whereas all enabled logs will be disabled
by using the UNLOGALL command (refer to the MiLLennium Command Descriptions Manual, Appendix C). All
activated logs will be listed in the receiver configuration status log (RCCA).
Syntax
Description
Example
LOG
port
COM1 or COM2
COM1
datatype
Enter one of the valid ASCII or Binary Data Logs (see later in this chapter and Appendix H, Page 88)
POSA
trigger
Enter one of the following triggers.
ONTIME
ONCE
Immediately logs the selected data to the selected port once. Default if trigger
field is left blank.
ONMARK
Logs the selected data when a MARKIN electrical event is detected. Outputs
internal buffers at time of mark - does not predict to mark time. Use MKBA/B for
predicted position at time of mark.
ONNEW
Logs the selected data each time the data is new even if the data is unchanged.
ONCHANGED
Logs the selected data only when the data has changed.
ONTIME
[period], [offset]
Immediately logs the selected data and then periodically logs the selected data at
a frequency determined by the period and offset parameters. The logging will
continue until an UNLOG command pertaining to the selected data item is
received (refer to the UNLOG Command, MiLLennium Command Descriptions
Manual).
CONTINUOUSLY
Will log the data all the time. The GPSCard will generate a new log when the
output buffer associated with the chosen port becomes empty. The continuously
option was designed for use with differential corrections over low bit rate data
links. This will provide optimal record generation rates. The next record will not
be generated until the last byte of the previous record is loaded into the output
buffer of the UART.
period
Use only with the ONTIME trigger. Units for this parameter are seconds. The selected period may be any
of the following values: 0.05, 0.10, 0.20, 0.25, 0.50, 1, 2, 3, ... , 3600 seconds but may be limited by the
GPSCard model and previously requested logs. Selected data is logged immediately and then periodic
logging of the data will start at the next even multiple of the period. If a period of 0.20 sec is chosen, then
data will be logged when the receiver time is at the 0.20, 0.40, 0.60 and the next (0.80) second marks. If
the period is 15 seconds, then the logger will log the data when the receiver time is at even 1/4 minute
marks. The same rule applies even if the chosen period is not divisible into its next second or minute
marks. If a period of 7 seconds is chosen, then the logger will log at the multiples of 7 seconds less than
60, that is, 7, 14, 21, 28, 35, 42, 49, 56 and every 7 seconds thereafter.
60
offset
Use only with the ONTIME trigger. Units for this parameter are seconds. It provides the ability to offset
the logging events from the above startup rule. If you wished to log data at 1 second after every minute
you would set the period to 60 seconds and the offset to 1 second (Default is 0).
1
hold
Will prevent a log from being removed when the
UNLOGALL
command is issued
HOLD
