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July 27, 2011
ALIGN Heading™ and ALIGN Relative Positioning™
1 Overview
This application note provides an overview of NovAtel's ALIGN family of heading solutions, including
the ALIGN Heading and ALIGN Relative Positioning models. Receiver hardware setup and software
configurations are also discussed.
Heading information can be logged from NovAtel's OEMV
maximum of 20 Hz on OEM6™ receivers. The Master receiver position accuracy can be enhanced by
adding OmniSTAR corrections or SBAS tracking, or by adding an optional RTK static base station.
2 ALIGN Models
There are two available ALIGN models:
ALIGN Heading provides angular heading and pitch measurements. The following logs are available
at any free port:
Logs
MASTERPOS
HEADING
HEADING2
GPHDT
ALIGNDOP
ALIGN Relative Positioning provides angular heading and pitch measurements, precise relative
positioning measurement and relative baseline information with centimetre level accuracy. The
following logs are available at any free port:
NovAtel Inc.
Tel: (403) 295-4500
n
Fax: (403) 295-4501
Application Note
ALIGN
®
Family of Heading Solutions
Position of the ALIGN Master
Heading and pitch angles
Heading and pitch angles with ROVERID
NMEA heading angle
DOP of heading computation
Table 1: ALIGN Heading Logs
n
1120 – 68th Avenue N.E. Calgary, AB, Canada T2E 8S5
n
Internet: http://www.novatel.com
®
receivers at a maximum rate of 10 Hz, or at a
Description
n
Email: gps@novatel.com
Page 1 of 10
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Summary of Contents for Novatel ALIGN Series
- Page 1 Family of Heading Solutions ALIGN Heading™ and ALIGN Relative Positioning™ 1 Overview This application note provides an overview of NovAtel’s ALIGN family of heading solutions, including the ALIGN Heading and ALIGN Relative Positioning models. Receiver hardware setup and software configurations are also discussed.
- Page 2 Master receiver. Receiver features may be limited if basic Position Velocity Time (PVT) only models are used (i.e., N1G). See Appendix A for more information. A typical ALIGN setup includes: • Two NovAtel OEMV receivers • Two NovAtel OEM6 receivers • A combination of OEMV and OEM6 •...
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Page 3: Use Cases
NovAtel Application Note 3 Use Cases A variety of symbols are used in this application note to depict ALIGN output symbols. The Meaning of each symbol is given below. Table 3: Use Case Legend 3.1 Use Case 1: Fixed Antenna Distance between Master and Rover Receivers on One Platform (ALIGN Heading) This use case requires one Master and one Rover receiver. - Page 4 (ie. COM2) using a NULL modem cable 2. Issue the following commands to the Master: MOVINGBASESTATION ENABLE INTERFACEMODE COM2 NOVATEL RTCA OFF COM COM2 230400 N 8 1 N OFF ON LOG COM2 RTCAOBS3 ONTIME 0.1 LOG COM2 RTCAREFEXT ONTIME 0.1 3.
- Page 5 3. Configure the Master receiver to output RTCA corrections at the same baud rate as the wireless data link: MOVINGBASESTATION ENABLE INTERFACEMODE COM2 NOVATEL RTCA OFF COM COM2 230400 N 8 1 N OFF ON LOG COM2 RTCAOBS3 ONTIME 0.1 LOG COM2 RTCAREFEXT ONTIME 0.1...
- Page 6 5. Configure COM2 of the Rover receiver to receive corrections and output heading information at the same baud rate as the wireless data link: INTERFACEMODE COM2 RTCA NOVATEL OFF COM COM2 230400 N 8 1 N OFF ON LOG COM2 HEADINGEXTB ONNEW 6.
- Page 7 3. Configure the Master receiver COM port to output corrections at the same baud rate as the wireless data link: MOVINGBASESTATION ENABLE INTERFACEMODE COM2 NOVATEL RTCA OFF COM COM2 230400 N 8 1 N OFF ON LOG COM2 RTCAOBS3 ONTIME 0.1 LOG COM2 RTCAREFEXT ONTIME 0.1...
- Page 8 3. Configure the Master receiver to output RTCA corrections at the same baud rate as the wireless data link: MOVINGBASESTATION ENABLE INTERFACEMODE COM2 NOVATEL RTCA OFF COM COM2 230400 N 8 1 N OFF ON LOG COM2 RTCAOBS3 ONTIME 0.1 LOG COM2 RTCAREFEXT ONTIME 0.1...
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Page 9: Appendix A Model Compatibility Chart
ALIGNDOP, RANGE Refer to the NovAtel product model list for complete list of ALIGN capable receivers and models. Refer to Table 1 and Table 2 for ALIGN-related commands and logs description. Full explanation of the commands and logs can be located in the OEMV/OEM6 Family Firmware Reference Manual. - Page 10 If you require any further information regarding the topics covered within this application, contact: NovAtel Customer Service 1120 – 68 Ave. N.E. Calgary, Alberta, Canada, T2E 8S5 Phone: 1-800-NOVATEL (in Canada or the U.S.) or +1-403-295-4500 Fax: 403-295-4501 E-mail: support@novatel.ca Website: www.novatel.com...
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