Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data
The global positioning system (GPS) has been used to support a wide variety of applications, such as high-accuracy positioning and navigation. Differential GPS techniques can largely eliminate common-mode errors between the reference and the rover GPS stations resulting from ionospheric and troposph...
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| Format: | Article |
| Language: | English |
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Elsevier
2011-09-01
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| Series: | Alexandria Engineering Journal |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S111001681100041X |
| _version_ | 1818741855708250112 |
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| author | Aly M. El-naggar |
| author_facet | Aly M. El-naggar |
| author_sort | Aly M. El-naggar |
| collection | DOAJ |
| description | The global positioning system (GPS) has been used to support a wide variety of applications, such as high-accuracy positioning and navigation. Differential GPS techniques can largely eliminate common-mode errors between the reference and the rover GPS stations resulting from ionospheric and tropospheric refraction and delays, satellite and receiver clock biases, and orbital errors [1]. The ionospheric delay in the propagation of global positioning system (GPS) signals is one of the main sources of error in GPS precise positioning and navigation. A dual-frequency GPS receiver can eliminate (to the first order) the ionospheric delay through a linear combination of the L1 and L2 observations [2]. The most significant effect of ionospheric delay appear in case of using single frequency data. In this paper the single frequency data of concerned station are converted to dual frequency data by employing dual frequency data from 11 regional GPS stations distributed around it. Total electron content (TEC) was calculated at every GPS station to produce the mathematical model of TEC which is a function of latitude (Φ) and longitude (λ). By using this mathematical model the values of TEC and L2 can be predicted at the single frequency GPS station for each satellite, after that the comparison between predicted and observation values of TEC and L2 was performed. The estimation method and test results of the proposed method indicates that the difference between predicted and observation values is very small. |
| first_indexed | 2024-12-18T02:03:15Z |
| format | Article |
| id | doaj.art-fbb1944bef5f4c68b0eb0ca077570815 |
| institution | Directory Open Access Journal |
| issn | 1110-0168 |
| language | English |
| last_indexed | 2024-12-18T02:03:15Z |
| publishDate | 2011-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj.art-fbb1944bef5f4c68b0eb0ca0775708152022-12-21T21:24:41ZengElsevierAlexandria Engineering Journal1110-01682011-09-0150323724310.1016/j.aej.2011.03.003Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency dataAly M. El-naggarThe global positioning system (GPS) has been used to support a wide variety of applications, such as high-accuracy positioning and navigation. Differential GPS techniques can largely eliminate common-mode errors between the reference and the rover GPS stations resulting from ionospheric and tropospheric refraction and delays, satellite and receiver clock biases, and orbital errors [1]. The ionospheric delay in the propagation of global positioning system (GPS) signals is one of the main sources of error in GPS precise positioning and navigation. A dual-frequency GPS receiver can eliminate (to the first order) the ionospheric delay through a linear combination of the L1 and L2 observations [2]. The most significant effect of ionospheric delay appear in case of using single frequency data. In this paper the single frequency data of concerned station are converted to dual frequency data by employing dual frequency data from 11 regional GPS stations distributed around it. Total electron content (TEC) was calculated at every GPS station to produce the mathematical model of TEC which is a function of latitude (Φ) and longitude (λ). By using this mathematical model the values of TEC and L2 can be predicted at the single frequency GPS station for each satellite, after that the comparison between predicted and observation values of TEC and L2 was performed. The estimation method and test results of the proposed method indicates that the difference between predicted and observation values is very small.http://www.sciencedirect.com/science/article/pii/S111001681100041XGPS signalSingle frequencyDual frequencyTEC |
| spellingShingle | Aly M. El-naggar Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data Alexandria Engineering Journal GPS signal Single frequency Dual frequency TEC |
| title | Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data |
| title_full | Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data |
| title_fullStr | Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data |
| title_full_unstemmed | Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data |
| title_short | Enhancing the accuracy of GPS point positioning by converting the single frequency data to dual frequency data |
| title_sort | enhancing the accuracy of gps point positioning by converting the single frequency data to dual frequency data |
| topic | GPS signal Single frequency Dual frequency TEC |
| url | http://www.sciencedirect.com/science/article/pii/S111001681100041X |
| work_keys_str_mv | AT alymelnaggar enhancingtheaccuracyofgpspointpositioningbyconvertingthesinglefrequencydatatodualfrequencydata |