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Schreiber's Differencing Scheme Applied to Carrier Phase Observations in the MAFA Method | IEEE Conference Publication | IEEE Xplore

Schreiber's Differencing Scheme Applied to Carrier Phase Observations in the MAFA Method


Abstract:

The subject of the article is Schreiber's scheme of carrier phase differencing in precise GNSS positioning. There is no need to assume the reference satellite in this app...Show More

Abstract:

The subject of the article is Schreiber's scheme of carrier phase differencing in precise GNSS positioning. There is no need to assume the reference satellite in this approach. In this contribution the idea of Schreiber's scheme of differencing was modified and implemented into Modified Ambiguity Function Approach method. The modification of the original idea is based on preparing only double differences and applying them to MAFA functional model. In this approach the integer nature of ambiguities is taken into account. The functional model of this approach is described in details. The numerical tests were carried out. The comparison of the results from the proposed method and a classic approach was performed. For long static session no differences between both methods occur. However in single-epoch positioning results show that using a proposed method allows to obtain more correct solutions than in classic approach.
Date of Conference: 02-04 June 2016
Date Added to IEEE Xplore: 23 August 2016
ISBN Information:
Conference Location: Gdansk, Poland

I. Introduction

One of the critical aspects of precise GNSS positioning is the determination of integer carrier phase cycle ambiguities. The carrier phase is the most precise measurement available, but only a fractional part of the phase can be measured. Without determination of the correct integer ambiguity parameters, precise positioning at the centimeter level is difficult to achieve. Since carrier phase ambiguities are integer values of whole cycles, only a specific set of integer values can satisfy certain geometrical constraints. Since a phase measurement is affected by many types of errors, it is not possible to separate these errors and determine the correct ambiguity for a single measurement. However, some GNSS errors are common to groups of GNSS observations [1].

References

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