An adaptive fusion algorithm for coastal sea altimetry based on dual-frequency Beidou-R carrier phase

This article proposes an integer ambiguity determination method based on Beidou system-reflectometry (Beidou-R) observations of the carrier phase at the B1I and B3I frequencies. To enhance the accuracy of sea surface height (SSH) estimation, this study introduces a parallel filtering algorithm and a...

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Bibliographic Details
Published in:PloS one 2024-05, Vol.19 (5), p.e0302305-e0302305
Main Authors: Xing, Jin, Yang, Dongkai, Zhang, Zhibo, Yang, Pengyu, Wang, Feng
Format: Article
Language:English
Subjects:
Accuracy
Adaptive algorithms
Algorithms
Altimeter
Altimetry
Altitude
Analysis
Antennas
Artificial satellites in remote sensing
Artificial satellites in surveying
Biology and Life Sciences
Coastal waters
Data analysis
Data collection
Data integration
Earth Sciences
Ecology and Environmental Sciences
Elevation angle
Energy consumption
Engineering and Technology
Environmental Monitoring - methods
Information management
Measurement
Measurement techniques
Methods
Oceanography
Oceans and Seas
Physical Sciences
Propagation
Receivers & amplifiers
Remote sensing
Research and Analysis Methods
Root-mean-square errors
Sea level
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Summary:This article proposes an integer ambiguity determination method based on Beidou system-reflectometry (Beidou-R) observations of the carrier phase at the B1I and B3I frequencies. To enhance the accuracy of sea surface height (SSH) estimation, this study introduces a parallel filtering algorithm and an adaptive iterative fusion algorithm, enabling data fusion based on the variance at B1I and B3I frequencies. To validate and evaluate the proposed method, a coastal experiment was conducted at the Shenxian River. In this experiment, reflected signals from GEO and IGSO satellites were collected. Data analysis reveals that the method is effective, demonstrating that the root mean square error (RMSE) of SSH achieves 2.85 cm and 2.89 cm for PRN 04 and PRN 33, respectively. Furthermore, the impact of the elevation angle on measurement accuracy is analyzed. This study aims to propose a method to enhance coastal sea surface height estimation, offering potential advancements in sea surface altimetry.
ISSN:1932-6203
1932-6203
DOI:10.1371/journal.pone.0302305