Calibration technique of navigation glonass receiver using combinations of dual-frequency pseudorange measurements

Аuthors

Vovasov V. E.^1*, Betanov V. V.^1**, Gerko S. A.^2***

1. Joint Stock Company “Russian Space Systems”, JSC “RSS”, 53, Aviamotornaya str., Moscow, 111250, Russia
2. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: vovasov@list.ru
**e-mail: vlavab@mail.ru
***e-mail: S.Gerko@mail.ru

Abstract

The aim of the work is to determine the settings of hardware delays in navigation receivers and satellite GLONASS transmitters in order to compensate ionospheric errors. The technique of the receiver calibration in this work is a method that does not use additional equipment to determine the settings of hardware delay algorithmic methods, taking into account the precise knowledge of navigation receiver position. The calibration allows one to retrieve values which are the difference of frequency-timing amendments not taken into account in the ephemerids. The assumption of the linear nature of hardware delay signals depending on the frequency allows one to determine the difference between the values observed delays in the L1 and L2 bands at zero, as well as announce changes lag of one type, in the ranges of L1 and L2, respectively. It is clear that these values are inseparable with the physical care of the timeline of the receiver and so will not have any impact on the assessment of the coordinates in the navigation solution.

The proposed method of calibration was applied to double frequency navigation receiver Javad TR-GNSS G3T. The study has shown the technique is sensitive to the accuracy of the navigation receiver. Using the same unbiased weighted difference allows one to apply the navigation algorithm for obtaining unbiased estimates of coordinates GLONASS receiver.

Keywords:

GLONASS reciever’s, pseudorange, vertical beam path error, ionosphere delays, tropospheric delays, hardware delays, SDCM

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