Real-Time Carrier Phase Positioning Using the RTCM Standard Message Types 20/21 and 18/19.

Janet Brown Neumann, Keith J. VanDierendonck, Allan Manz, and Thomas J. Ford

Abstract:	NovAtel has recently incorporated the use of RTCM SC-104 standard RTK (Real-Time-Kinematic) message types into its real-time carrier phase positioning products. The RTCM RTK messages are implemented either as corrections to the pseudorange and carrier phase (Types 20 and 21), or as raw measurement information (Types 18 and 19). A comparison is given of the two types of message pairs, and a discussion is presented on the development issues that were faced when incorporating this capability into the existing RTK products. Results are presented from tests involving the RTCM type 20/21 implementation in the NovAtel RT2 product used with RTCM type 20/21 messages generated from other manufacturers’ receivers with third party software. Comparisons are made between the performance using two NovAtel receivers, and that obtained when using a different manufacturer’s receiver as the base station.
Published in:	Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997) September 16 - 19, 1997 Kansas City, MO
Pages:	857 - 866
Cite this article:	Neumann, Janet Brown, VanDierendonck, Keith J., Manz, Allan, Ford, Thomas J., "Real-Time Carrier Phase Positioning Using the RTCM Standard Message Types 20/21 and 18/19.," Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1997), Kansas City, MO, September 1997, pp. 857-866.
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