Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System
The ambiguity resolution (AR) and validation of the global navigation satellite system (GNSS) have been challenging tasks for some decades. Considering the reliability problem of extra-wide-lane (EWL) ambiguity in the triple-carrier ambiguity resolution (TCAR), a method for validating the reliabilit...
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MDPI AG
2020-03-01
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| Online Access: | https://www.mdpi.com/1424-8220/20/5/1534 |
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| author | Jian Deng Aiguo Zhang Nenghui Zhu Fuyang Ke |
| author_facet | Jian Deng Aiguo Zhang Nenghui Zhu Fuyang Ke |
| author_sort | Jian Deng |
| collection | DOAJ |
| description | The ambiguity resolution (AR) and validation of the global navigation satellite system (GNSS) have been challenging tasks for some decades. Considering the reliability problem of extra-wide-lane (EWL) ambiguity in the triple-carrier ambiguity resolution (TCAR), a method for validating the reliability of the EWL ambiguity using a single epoch was proposed for the BeiDou Navigation Satellite System (BDS). For the initial EWL ambiguity, obtained using a rounding estimator with a geometry-free (GF) model, the double-difference ionospheric delay was first estimated to construct a relative positioning model with an initial fixed ambiguity. Second, based on the theory of gross error detection and the AR characteristics of EWL, the second-best ambiguity candidate was constructed. Finally, among the two sets of ambiguities, the one with the smaller posterior variance was taken as the reliable ambiguity. The study showed that, for a single epoch, when only one or two satellites had incorrect ambiguities, the AR success rate after ambiguity validation and correction could reach 100% for medium baselines. For long baselines, due to the increase of atmospheric error, the validation was affected to some extent. However, the AR success rates for two long baselines increased from 96.82% and 98.44% to 98.80% and 99.67%, respectively. |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-14T03:41:47Z |
| publishDate | 2020-03-01 |
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| spelling | doaj.art-e6b55fac164c4c3d90296ca0992ec88b2022-12-22T02:14:31ZengMDPI AGSensors1424-82202020-03-01205153410.3390/s20051534s20051534Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite SystemJian Deng0Aiguo Zhang1Nenghui Zhu2Fuyang Ke3Department of Surveying and Remote Sensing Engineering, Xiamen University of Technology, Xiamen 361024, ChinaDepartment of Surveying and Remote Sensing Engineering, Xiamen University of Technology, Xiamen 361024, ChinaSchool of Applied Mathematics, Xiamen University of Technology, Xiamen 361024, ChinaSchool of Remote Sensing and Geomatics Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaThe ambiguity resolution (AR) and validation of the global navigation satellite system (GNSS) have been challenging tasks for some decades. Considering the reliability problem of extra-wide-lane (EWL) ambiguity in the triple-carrier ambiguity resolution (TCAR), a method for validating the reliability of the EWL ambiguity using a single epoch was proposed for the BeiDou Navigation Satellite System (BDS). For the initial EWL ambiguity, obtained using a rounding estimator with a geometry-free (GF) model, the double-difference ionospheric delay was first estimated to construct a relative positioning model with an initial fixed ambiguity. Second, based on the theory of gross error detection and the AR characteristics of EWL, the second-best ambiguity candidate was constructed. Finally, among the two sets of ambiguities, the one with the smaller posterior variance was taken as the reliable ambiguity. The study showed that, for a single epoch, when only one or two satellites had incorrect ambiguities, the AR success rate after ambiguity validation and correction could reach 100% for medium baselines. For long baselines, due to the increase of atmospheric error, the validation was affected to some extent. However, the AR success rates for two long baselines increased from 96.82% and 98.44% to 98.80% and 99.67%, respectively.https://www.mdpi.com/1424-8220/20/5/1534ewl ambiguity resolutionreliabilitytriple-frequencygross error detectbds |
| spellingShingle | Jian Deng Aiguo Zhang Nenghui Zhu Fuyang Ke Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System Sensors ewl ambiguity resolution reliability triple-frequency gross error detect bds |
| title | Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System |
| title_full | Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System |
| title_fullStr | Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System |
| title_full_unstemmed | Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System |
| title_short | Extra-Wide Lane Ambiguity Resolution and Validation for a Single Epoch Based on the Triple-Frequency BeiDou Navigation Satellite System |
| title_sort | extra wide lane ambiguity resolution and validation for a single epoch based on the triple frequency beidou navigation satellite system |
| topic | ewl ambiguity resolution reliability triple-frequency gross error detect bds |
| url | https://www.mdpi.com/1424-8220/20/5/1534 |
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