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1 Quick Start
2 MiLLennium Command Descriptions Manual
e.g. On the command line of the Command Console screen type:log com1 posa once
After you hit the <Enter> key the ASCII Record screen will display the output for your current position. See the
POSA/B log description in Appendix D.
1.2 DATA LOGGING
The GPSCard has four major logging formats:
• NovAtel Format Data Logs (ASCII/Binary)
•
NMEA Standard Format Data Logs (ASCII)
•
RTCM Standard Format Data Logs (Binary)
•
RTCA Standard Format Data Logs (Binary)
All data types can be logged using several methods of triggering each log event. Each log is initiated using the
LOG
command. The LOG command and syntax are listed on the following page.
Syntax:
log [port],datatype,[trigger],[period],[offset],{hold}
The syntax for a command can contain optional parameters (OPT1, OPT2, ...). OPT2 may only be used if it
is preceded by OPT1. OPT3 may only be used if it is preceded by OPT2 and so on. Parameters after and
including OPT1 will be surrounded by square brackets.
An optional parameter such as {hold} surrounded by braces may be used with the log without any preceding
optional parameters. Example:
log com1 posa 60 1 hold
log com1 posa hold
Syntax Description Example
LOG LOG
port COM1 or COM2 Defaults to the port that the command was entered on. COM1
datatype Enter one of the valid ASCII or Binary Data Logs (see Chapter 4 and Appendix D) 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 extrapolate to mark time. Use MKBA/B for extrapolated 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 (see UNLOG
Command).
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 value
from 0.05 second to 3600 seconds. 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