Assessment of Differential Carrier Phase Measurements from Orbcomm LEO Satellite Signals for Opportunistic Navigation

Joe Khalife and Zaher M. Kassas

Peer Reviewed

Abstract:	A framework for positioning with carrier phase differential (CD) - low Earth orbit (LEO) (CD-LEO) measurements is developed. This framework utilizes a base and a rover and enables navigation with the Orbcomm LEO constellation without requiring prior knowledge of the rover’s position. The effect of ionospheric and tropospheric delays on the carrier phase and CD-LEO measurements are discussed. The residual ionospheric and tropospheric delays are studied as a function of the baseline. Moreover, the position dilution of precision (PDOP) is studied for the Orbcomm constellation, and it is found that a less than unity PDOP may be achieved for 8-minute wait times. Experimental results show a receiver positioning itself exclusively with CD-LEO measurements from two Orbcomm satellites with a position error of 11.93 m.
Published in:	Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019) September 16 - 20, 2019 Hyatt Regency Miami Miami, Florida
Pages:	4053 - 4063
Cite this article:	Khalife, Joe, Kassas, Zaher M., "Assessment of Differential Carrier Phase Measurements from Orbcomm LEO Satellite Signals for Opportunistic Navigation," Proceedings of the 32nd International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2019), Miami, Florida, September 2019, pp. 4053-4063. https://doi.org/10.33012/2019.17031
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