The effect of UNBabc mapping function modification to GPS tropospheric delay
Tropospheric delay refers to the refraction of the Global Positioning System (GPS) signal as it passes through the neutral atmosphere from the satellite to the earth, which causes longer distance traveled by the signal. The zenith tropospheric delay can be amplified by mapping function, especially f...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Universiti Putra Malaysia Press
2008
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| Online Access: | http://psasir.upm.edu.my/id/eprint/17118/ http://psasir.upm.edu.my/id/eprint/17118/1/17118.pdf |
| _version_ | 1848843152942694400 |
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| author | Sakidin, Hamzah Abu Bakar, Mohd Rizam Mohamed Shariff, Abdul Rashid Md Nooraini, Mohd Salmi Matori, Abd. Nasir Mohamed, Azhari Ahamd, Asmala |
| author_facet | Sakidin, Hamzah Abu Bakar, Mohd Rizam Mohamed Shariff, Abdul Rashid Md Nooraini, Mohd Salmi Matori, Abd. Nasir Mohamed, Azhari Ahamd, Asmala |
| author_sort | Sakidin, Hamzah |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | Tropospheric delay refers to the refraction of the Global Positioning System (GPS) signal as it passes through the neutral atmosphere from the satellite to the earth, which causes longer distance traveled by the signal. The zenith tropospheric delay can be amplified by mapping function, especially for less than 5 degrees elevation angle. Many mapping functions have been established however the mapping functions give large value when the elevation angles less than 5 degrees. A modification of UNBabc mapping function has been proposed. The modified UNBabc mapping function model shows a significant reduction of mapping function scale factor. As the coefficient of the zenith tropospheric delay, the value of mapping function will affect total tropospheric delay. The modification UNBabc mapping function has improved the tropospheric delay up to 19.1 percent at two degree elevation angles. |
| first_indexed | 2025-11-15T08:10:29Z |
| format | Article |
| id | upm-17118 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T08:10:29Z |
| publishDate | 2008 |
| publisher | Universiti Putra Malaysia Press |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-171182015-05-27T08:19:55Z http://psasir.upm.edu.my/id/eprint/17118/ The effect of UNBabc mapping function modification to GPS tropospheric delay Sakidin, Hamzah Abu Bakar, Mohd Rizam Mohamed Shariff, Abdul Rashid Md Nooraini, Mohd Salmi Matori, Abd. Nasir Mohamed, Azhari Ahamd, Asmala Tropospheric delay refers to the refraction of the Global Positioning System (GPS) signal as it passes through the neutral atmosphere from the satellite to the earth, which causes longer distance traveled by the signal. The zenith tropospheric delay can be amplified by mapping function, especially for less than 5 degrees elevation angle. Many mapping functions have been established however the mapping functions give large value when the elevation angles less than 5 degrees. A modification of UNBabc mapping function has been proposed. The modified UNBabc mapping function model shows a significant reduction of mapping function scale factor. As the coefficient of the zenith tropospheric delay, the value of mapping function will affect total tropospheric delay. The modification UNBabc mapping function has improved the tropospheric delay up to 19.1 percent at two degree elevation angles. Universiti Putra Malaysia Press 2008 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/17118/1/17118.pdf Sakidin, Hamzah and Abu Bakar, Mohd Rizam and Mohamed Shariff, Abdul Rashid and Md Nooraini, Mohd Salmi and Matori, Abd. Nasir and Mohamed, Azhari and Ahamd, Asmala (2008) The effect of UNBabc mapping function modification to GPS tropospheric delay. Malaysian Journal of Mathematical Sciences, 2 (1). pp. 59-71. ISSN 1823-8343 http://einspem.upm.edu.my/journal/volume2.1.php |
| spellingShingle | Sakidin, Hamzah Abu Bakar, Mohd Rizam Mohamed Shariff, Abdul Rashid Md Nooraini, Mohd Salmi Matori, Abd. Nasir Mohamed, Azhari Ahamd, Asmala The effect of UNBabc mapping function modification to GPS tropospheric delay |
| title | The effect of UNBabc mapping function modification to GPS tropospheric delay |
| title_full | The effect of UNBabc mapping function modification to GPS tropospheric delay |
| title_fullStr | The effect of UNBabc mapping function modification to GPS tropospheric delay |
| title_full_unstemmed | The effect of UNBabc mapping function modification to GPS tropospheric delay |
| title_short | The effect of UNBabc mapping function modification to GPS tropospheric delay |
| title_sort | effect of unbabc mapping function modification to gps tropospheric delay |
| url | http://psasir.upm.edu.my/id/eprint/17118/ http://psasir.upm.edu.my/id/eprint/17118/ http://psasir.upm.edu.my/id/eprint/17118/1/17118.pdf |