Dual-frequency ambiguity fixing method based on improved AFM approach

Chengzhong Zhang; Dingjie Wang; Jie Wu

doi:10.1117/12.3059173

2 January 2025 Dual-frequency ambiguity fixing method based on improved AFM approach

Chengzhong Zhang, Dingjie Wang, Jie Wu

Author Affiliations +

Proceedings Volume 13514, International Conference on Remote Sensing and Digital Earth (RSDE 2024); 135140L (2025) https://doi.org/10.1117/12.3059173
Event: 2024 International Conference on Remote Sensing and Digital Earth, 2024, Chengdu, China

Abstract

To address the high computational load and resource consumption associated with traditional carrier phase fixing methods in short baseline positioning, this paper proposes a novel approach that utilizes raw dual-frequency high-precision satellite navigation carrier phase inter-station differential information to eliminate the effects of inter-station clock errors. This method is based on Dual-Frequency AFM (Ambiguity Function Method) for fixing the integer ambiguities of short baselines in a single epoch and single satellite scenario. By improving the AFM objective function, the method directly employs the inter-station differential information of dual-frequency carrier phases without relying on previous epoch caching or pseudorange information, effectively reducing computational requirements. Using a set of measured short baseline dual-station observation data, we validate the stability of the inter-station single-differential carrier phase ambiguity compensation values and their differences from true values. The results indicate that under an ideal condition with a 0.5m baseline, the error rate is less than 1%, and the computation speed increases by nearly 99%. This method effectively facilitates the fixing of inter-station single-differential carrier phase ambiguities under dual-frequency observable conditions and demonstrates promising application prospects.

(2025) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Chengzhong Zhang, Dingjie Wang, and Jie Wu "Dual-frequency ambiguity fixing method based on improved AFM approach", Proc. SPIE 13514, International Conference on Remote Sensing and Digital Earth (RSDE 2024), 135140L (2 January 2025); https://doi.org/10.1117/12.3059173

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KEYWORDS

Satellites

Antennas

Clocks

Receivers

Atomic force microscopy

Satellite navigation systems

Error analysis

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