Features of estimating ionospheric delay from carrier phase observations of dual-frequency GLONASS signals

Vladimir B. Pudlovskiy

doi:10.1117/12.2644917

7 December 2022 Features of estimating ionospheric delay from carrier phase observations of dual-frequency GLONASS signals

Vladimir B. Pudlovskiy

Author Affiliations +

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123417G (2022) https://doi.org/10.1117/12.2644917
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

Signals processing of global navigation satellite systems (GNSS) make it possible to estimate delay due to refraction in the ionosphere, as well as the ionospheric total electronic content (TEC). Most of used the ionospheric delay estimation methods are based on processing joint measurements by code and carrier phase in two bands of signals from a navigation satellite. For these methods it is necessary to estimate the value of systematic errors associated with different signal delays in different frequency bands in the radio frequency path of the transmitter satellite and receiver navigation equipment, called differential code biases (DCB). The paper describes the features of the implementation of the method of processing only synchronous phase measurements in different frequency ranges by signals from two GLONASS satellites. The proposed method allows to exclude the influence of DCB on the error of navigation signal delay estimation due to refraction in the ionosphere. An important condition for the implementation of the method is the possibility of observing two satellites with close viewing angles relative to the receiver. The composition of the sources of uncertainty of the obtained estimates of the delay in the ionosphere and TEC is given.

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Vladimir B. Pudlovskiy "Features of estimating ionospheric delay from carrier phase observations of dual-frequency GLONASS signals", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123417G (7 December 2022); https://doi.org/10.1117/12.2644917

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KEYWORDS

Phase measurement

Satellite navigation systems

Error analysis

Signal processing

Satellites

Receivers

Navigation systems

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