Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model
For GPS medium-long baseline real-time kinematic (RTK) positioning, the troposphere parameter is introduced along with coordinates, and the model is ill-conditioned due to its strong correlation with the height parameter. For BeiDou Navigation Satellite System (BDS), additional difficulties occur du...
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MDPI AG
2018-04-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/18/4/1199 |
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| author | Bao Shu Hui Liu Longwei Xu Chuang Qian Xiaopeng Gong Xiangdong An |
| author_facet | Bao Shu Hui Liu Longwei Xu Chuang Qian Xiaopeng Gong Xiangdong An |
| author_sort | Bao Shu |
| collection | DOAJ |
| description | For GPS medium-long baseline real-time kinematic (RTK) positioning, the troposphere parameter is introduced along with coordinates, and the model is ill-conditioned due to its strong correlation with the height parameter. For BeiDou Navigation Satellite System (BDS), additional difficulties occur due to its special satellite constellation. In fact, relative zenith troposphere delay (RZTD) derived from high-precision empirical zenith troposphere models can be introduced. Thus, the model strength can be improved, which is also called the RZTD-constrained RTK model. In this contribution, we first analyze the factors affecting the precision of BDS medium-long baseline RTK; thereafter, 15 baselines ranging from 38 km to 167 km in different troposphere conditions are processed to assess the performance of RZTD-constrained RTK. Results show that the troposphere parameter is difficult to distinguish from the height component, even with long time filtering for BDS-only RTK. Due to the lack of variation in geometry for the BDS geostationary Earth orbit satellite, the long convergence time of ambiguity parameters may reduce the height precision of GPS/BDS-combined RTK in the initial period. When the RZTD-constrained model was used in BDS and GPS/BDS-combined situations compared with the traditional RTK, the standard deviation of the height component for the fixed solution was reduced by 52.4% and 34.0%, respectively. |
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| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-13T00:29:25Z |
| publishDate | 2018-04-01 |
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| spelling | doaj.art-da8c33a9313f49b3a33b2f10ace22ff22022-12-22T03:10:31ZengMDPI AGSensors1424-82202018-04-01184119910.3390/s18041199s18041199Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere ModelBao Shu0Hui Liu1Longwei Xu2Chuang Qian3Xiaopeng Gong4Xiangdong An5GNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, ChinaGNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, ChinaGNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, ChinaGNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, ChinaGNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, ChinaGNSS Research Center, Wuhan University, No. 129 Luoyu Road, Wuhan 430079, ChinaFor GPS medium-long baseline real-time kinematic (RTK) positioning, the troposphere parameter is introduced along with coordinates, and the model is ill-conditioned due to its strong correlation with the height parameter. For BeiDou Navigation Satellite System (BDS), additional difficulties occur due to its special satellite constellation. In fact, relative zenith troposphere delay (RZTD) derived from high-precision empirical zenith troposphere models can be introduced. Thus, the model strength can be improved, which is also called the RZTD-constrained RTK model. In this contribution, we first analyze the factors affecting the precision of BDS medium-long baseline RTK; thereafter, 15 baselines ranging from 38 km to 167 km in different troposphere conditions are processed to assess the performance of RZTD-constrained RTK. Results show that the troposphere parameter is difficult to distinguish from the height component, even with long time filtering for BDS-only RTK. Due to the lack of variation in geometry for the BDS geostationary Earth orbit satellite, the long convergence time of ambiguity parameters may reduce the height precision of GPS/BDS-combined RTK in the initial period. When the RZTD-constrained model was used in BDS and GPS/BDS-combined situations compared with the traditional RTK, the standard deviation of the height component for the fixed solution was reduced by 52.4% and 34.0%, respectively.http://www.mdpi.com/1424-8220/18/4/1199BDSzenith troposphere delaymedium-long baseline RTKsatellite geometric structuregeostationary Earth orbit satellite |
| spellingShingle | Bao Shu Hui Liu Longwei Xu Chuang Qian Xiaopeng Gong Xiangdong An Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model Sensors BDS zenith troposphere delay medium-long baseline RTK satellite geometric structure geostationary Earth orbit satellite |
| title | Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model |
| title_full | Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model |
| title_fullStr | Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model |
| title_full_unstemmed | Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model |
| title_short | Performance Analysis of BDS Medium-Long Baseline RTK Positioning Using an Empirical Troposphere Model |
| title_sort | performance analysis of bds medium long baseline rtk positioning using an empirical troposphere model |
| topic | BDS zenith troposphere delay medium-long baseline RTK satellite geometric structure geostationary Earth orbit satellite |
| url | http://www.mdpi.com/1424-8220/18/4/1199 |
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