Novatel OM-20000041 用户手册
1
Quick Start
20
MiLLennium GPSCard Software Version 4.50 Command Descriptions Manual Rev 1
Example:
fix position 51.11358042,-114.04358013,1059.4105,119,0
log com1,rtcm3,ontime,10
log com1,rtcm59,ontime,2
2. At the remote station:
accept com
n,rtcm
Example:
accept com2,rtcm
Congratulations! Your RT-20 system is now in operation!
Monitoring Your RTK Output Data
At the remote station, you could now select any or all of these output logs for positioning information:
•
BSLA/B
Baseline Measurement
•
NMEA-format logs
•
POSA/B
Computed Position
•
PRTKA/B Best Position
•
RPSA/B
Reference Station Position & Health
•
RTKA/B
RTK Output - Time Matched Positions
The POSA/B, PRTKA/B and NMEA-format logs contain the low-latency position; the RTKA/B logs contain the
matched position. The low-latency solution is the recommended one for kinematic users, while the matched
solution is the one recommended for stationary users. For a discussion on low-latency and matched positions, see
the Differential Positioning section of Appendix A, Page 66.
matched position. The low-latency solution is the recommended one for kinematic users, while the matched
solution is the one recommended for stationary users. For a discussion on low-latency and matched positions, see
the Differential Positioning section of Appendix A, Page 66.
Options for Logging Differential Corrections
SET DGPSTIMEOUT
The
DGPSTIMEOUT
command allows the reference station to set the delay by which it will inhibit utilization of new
ephemeris data in its differential corrections. This delay ensures that the remote receivers have had sufficient time
to collect updated ephemeris data as well.
to collect updated ephemeris data as well.
A delay of 120 to 130 seconds will typically ensure that the rover stations have collected updated ephemeris. After
the delay period is passed, the reference station will begin using new ephemeris data. To enter an ephemeris delay
value, you must first enter a numeric placeholder in the DGPS delay field (e.g., 2). When operating as a reference
station, DGPS delay will be ignored (see the
the delay period is passed, the reference station will begin using new ephemeris data. To enter an ephemeris delay
value, you must first enter a numeric placeholder in the DGPS delay field (e.g., 2). When operating as a reference
station, DGPS delay will be ignored (see the
DGPSTIMEOUT
command found in Chapter 2, Page 23 and Appendix
C, Page 90 for further information on using this command at rover stations.)
Syntax:
Example:
dgpstimeout 2,300
USING RTCM SC-104 LOG TYPES
DGPSTIMEOUT
dgps delay
ephem delay
Command
Option
Description
Default
DGPSTIMEOUT
Command
dgps delay
min.
2
max.
1000
Maximum age in seconds
60
ephem delay
min.
0
max.
600
Minimum time delay in seconds
120