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Precise Method of Ambiguity Initialization for Short Baselines with L1-L5 or E5-E5a GPS/GALILEO Data.

Mieczysław Bakuła^1,2

¹Faculty of Geoengineering, University of Warmia and Mazury, 10-719 Olsztyn, Poland.

Sensors (Basel, Switzerland)

|August 5, 2020

Summary

A new method, PREFMAR, precisely and quickly resolves ambiguities in Global Navigation Satellite System (GNSS) phase observations without needing a float solution. This advancement enables reliable high-precision navigation and geoscience applications.

Keywords:

E1-E5a GALILEO GNSS GPS L1-L5 PREFMAR ambiguity function

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Area of Science:

Geodesy and Geomatics Engineering
Satellite Navigation Systems

Background:

Precise determination of ambiguities in Global Navigation Satellite System (GNSS) phase observations is crucial for high-accuracy positioning.
Existing methods often rely on variance-covariance matrices and float solutions, which can be computationally intensive and time-consuming.

Discussion:

The presented PREFMAR method offers a novel approach to ambiguity resolution for GPS/GALILEO systems using L1/E1 and L5/E5a frequencies.
It bypasses the need for a variance-covariance matrix and float solution, simplifying the process.
The method is effective for short baseline double-difference observations.

Key Insights:

PREFMAR achieves precise and fast ambiguity resolution based on mathematical search functions.
Reliable ambiguity calculation is possible with code measurement errors under 0.38 m and phase observation errors within ±3 cm.
The study includes mathematical derivations and numerical validation using real GPS data.

Outlook:

The developed algorithms are easily implementable in GNSS receivers and mobile phones.
Potential for widespread adoption in various geoscience applications and precise GPS/GALILEO navigation.