PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE
The Zenithal Tropospheric Delay (Z TD) is an important error source in the observable involved in the positioning methods using artificial satellite. Frequently, the Z TD influence in the positioning is minimized by applying empirical models. However, such models are not able to supply the precision...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Universidade Federal de Uberlândia
2006-12-01
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| Series: | Revista Brasileira de Cartografia |
| Subjects: | |
| Online Access: | http://www.rbc.ufrj.br/_2006/58_3_08.htm |
| _version_ | 1819122256340582400 |
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| author | João Francisco Galera Monico LUiz Augusto Toledo Machado Luiz Fernando Sapucci |
| author_facet | João Francisco Galera Monico LUiz Augusto Toledo Machado Luiz Fernando Sapucci |
| author_sort | João Francisco Galera Monico |
| collection | DOAJ |
| description | The Zenithal Tropospheric Delay (Z TD) is an important error source in the observable involved in the positioning methods using artificial satellite. Frequently, the Z TD influence in the positioning is minimized by applying empirical models. However, such models are not able to supply the precision required to some real time applications, such as navigation and steak out. In 2010 it will be implanted the new navigation and administration system of the air traffic, denominated CNS-ATM (Communication Navigation Surveillance - Air Traffic Management). In this new system the application of positioning techniques by satellites in the air traffic will be quite explored because they provide good precision in real time. The predictions of Z TD values from Numeric Weather Prediction (NWP), denominated dynamic modeling, is an alternative to model the atmospheric gases effects in the radio-frequency signals in real time. The Center for Weather Forecasting and Climate Studies (CPTEC) has generated operationally prediction of Z TD values to South American Continent since March, 2004. The aims of the present paper are to investigate the Z TD seasonal variability and evaluate the quality of predicted Z TD values. One year of GPS data from Brazilian Continuous GPS Network (RBMC) was used in this evaluation. The RMS values resulting from this evaluation were in the range of 4 to 11 cm. Considering the Z TDtemporal variability, the advantages provide by this modeling, the results obtained in this evaluation and the future improvements, this work shows that the dynamic modeling has great potential to become the most appropriate alternative to model Z TD in real time. |
| first_indexed | 2024-12-22T06:49:34Z |
| format | Article |
| id | doaj.art-67b9bdfd12c94efd966c6241ae77fbfd |
| institution | Directory Open Access Journal |
| issn | 0560-4613 1808-0936 |
| language | English |
| last_indexed | 2024-12-22T06:49:34Z |
| publishDate | 2006-12-01 |
| publisher | Universidade Federal de Uberlândia |
| record_format | Article |
| series | Revista Brasileira de Cartografia |
| spelling | doaj.art-67b9bdfd12c94efd966c6241ae77fbfd2022-12-21T18:35:11ZengUniversidade Federal de UberlândiaRevista Brasileira de Cartografia0560-46131808-09362006-12-01583279292PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADEJoão Francisco Galera MonicoLUiz Augusto Toledo MachadoLuiz Fernando SapucciThe Zenithal Tropospheric Delay (Z TD) is an important error source in the observable involved in the positioning methods using artificial satellite. Frequently, the Z TD influence in the positioning is minimized by applying empirical models. However, such models are not able to supply the precision required to some real time applications, such as navigation and steak out. In 2010 it will be implanted the new navigation and administration system of the air traffic, denominated CNS-ATM (Communication Navigation Surveillance - Air Traffic Management). In this new system the application of positioning techniques by satellites in the air traffic will be quite explored because they provide good precision in real time. The predictions of Z TD values from Numeric Weather Prediction (NWP), denominated dynamic modeling, is an alternative to model the atmospheric gases effects in the radio-frequency signals in real time. The Center for Weather Forecasting and Climate Studies (CPTEC) has generated operationally prediction of Z TD values to South American Continent since March, 2004. The aims of the present paper are to investigate the Z TD seasonal variability and evaluate the quality of predicted Z TD values. One year of GPS data from Brazilian Continuous GPS Network (RBMC) was used in this evaluation. The RMS values resulting from this evaluation were in the range of 4 to 11 cm. Considering the Z TDtemporal variability, the advantages provide by this modeling, the results obtained in this evaluation and the future improvements, this work shows that the dynamic modeling has great potential to become the most appropriate alternative to model Z TD in real time.http://www.rbc.ufrj.br/_2006/58_3_08.htmZenithal Tropospheric DelayNumerical Weather PredictionGPSReal Time positioning. |
| spellingShingle | João Francisco Galera Monico LUiz Augusto Toledo Machado Luiz Fernando Sapucci PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE Revista Brasileira de Cartografia Zenithal Tropospheric Delay Numerical Weather Prediction GPS Real Time positioning. |
| title | PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE |
| title_full | PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE |
| title_fullStr | PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE |
| title_full_unstemmed | PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE |
| title_short | PREVISÕES DO ATRASO ZENITAL TROPOSFÉRICO PARA A AMÉRICA DO SUL: VARIABILIDADE SAZONAL E AVALIAÇÃO DA QUALIDADE |
| title_sort | previsoes do atraso zenital troposferico para a america do sul variabilidade sazonal e avaliacao da qualidade |
| topic | Zenithal Tropospheric Delay Numerical Weather Prediction GPS Real Time positioning. |
| url | http://www.rbc.ufrj.br/_2006/58_3_08.htm |
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