GLONASS–only FDMA+CDMA RTK

Performance and outlook

Journal article (2021)

Authors

Safoora Zaminpardaz Royal Melbourne Institute of Technology University
P.J.G. Teunissen Curtin University, Mathematical Geodesy and Positioning - CEG , University of Melbourne
Amir Khodabandeh University of Melbourne
Research Group
Mathematical Geodesy and Positioning (CEG) (TU Delft)
Copyright: © 2021 Safoora Zaminpardaz, P.J.G. Teunissen, Amir Khodabandeh
DOI: https://doi.org/10.1007/s10291-021-01132-z
More Info
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Published Date

2021

Language

English

Faculty

Civil Engineering & Geosciences

Department

Geoscience and Remote Sensing

Research Group

Mathematical Geodesy and Positioning

Abstract

An assessment of standalone GLONASS RTK performance is provided using its FDMA and CDMA signals. The new integer-estimable GLONASS FDMA model (Teunissen 2019), which guarantees the integer-estimability of its ambiguities, is employed. We introduce the combined integer-estimable GLONASS FDMA+CDMA model and compare its strength against the FDMA model for instantaneous integer ambiguity resolution and positioning. Various combinations of GLONASS signals are considered including FDMA L1, FDMA+CDMA L1+L3, FDMA L1+L2 and FDMA+CDMA L1+L2+L3. To provide insight into the current RTK performance of GLONASS, we used observations of a short baseline to analyze the integer ambiguity resolution success rate and positioning precision, formally and empirically. To provide insight into the future RTK performance of GLONASS, we present a formal analysis of the integer ambiguity resolution success rate and ADOP, assuming that all the GLONASS satellites transmit FDMA L1, L2 and CDMA L3 signals. A formal analysis of standalone GLONASS ambiguity resolution based on current and future GLONASS constellation is then presented for different locations around the world.