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REAL-TIME KINEMATIC (RTK) POSITIONING (FlexPak-
G2-V1, FlexPak-G2-V1G and FlexPak-G2-V2)
Corrections can be transmitted from a base station to a rover
station to improve position accuracy. The base station is the
GNSS receiver which is acting as the stationary reference. It has
a known position and transmits correction messages to the rover
station. The rover station is the GNSS receiver which does not
know its exact position and can receive correction messages
from a base station to calculate differential GNSS positions.
A data link is needed between the base station and rover station
(two NovAtel receivers) in order for the rover to receive
corrections. The data link must support the throughput needed
to receive complete correction messages. A data rate of 9600
bits per second with less than 4.0 s latency is recommended.
Once your base and rover are set up, you can configure them for
RTCA, RTCM, RTCMV3, CMR+ or CMR corrections. An RTCM
example follows (replace the latitude, longitude and height
coordinates shown with those of your base):
Base
interfacemode com2 none rtca off
fix position 51.11358042 -114.04358013
1059.4105 (enter your own lat, lon, hgt)
log com2 rtcaobs ontime 1
log com2 rtcaref ontime 10
log com2 rtca1 ontime 5
log com2 rtcaephem ontime 10 1 (optional)
Rover
interfacemode com2 rtca none off
RT-2 (OEMV-2) and RT-20 (OEMV-1, OEMV-1G and OEMV-2),
all with AdVance RTK, are real-time kinematic software products
developed by NovAtel. Optimal RTK performance is achieved
when both the base and rovers are NovAtel products. However,
AdVance RTK will operate with equipment from other
manufacturers when using RTCM messaging.
RT-2 and RT-20 are supported by GPS-only and
GPS+GLONASS OEMV-based models. Also, RT-20 with
GPS+GLONASS provides faster convergence.
1. Refer to the GPGST log's usage box in the Firmware Reference
Manual for a definition of RMS and other statistics.
2. For more base/rover configurations, search the key words "rover
base" on our Knowledge Database at:
http://www.novatel.com/support/knowledgedb.htm
POST PROCESSING
Post-mission data processing refers to when the GNSS data
collected by the receiver is processed after the entire data-
collection session is complete.
Output from NovAtel receivers is compatible with post-
processing software from the Waypoint Products Group, NovAtel
Inc. For details, visit our Web site at:
http://www.novatel.com/products/waypoint_pps.htm
QUESTIONS OR COMMENTS
If you have any questions or comments regarding your FlexPak,
please contact NovAtel using one of these methods:
Email:
support@novatel.ca
Web:
www.novatel.com
Phone: 1-800-NOVATEL (U.S. & Canada)
403-295-4900 (International)
Fax:
403-295-4901
Quick Start Guide - FlexPak-G2-V1/G2-V1G/G2-V2/G2-OEMStar
© Copyright 2007-2010 NovAtel Inc. All rights reserved.
Printed in Canada on recycled paper. Recyclable.
Unpublished rights reserved under international copyright laws.
GM-14915091
Rev 2
2010/01/05
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