Sakidin, Hamzah and Tay, Choo Chuan (2011) Transformation of Neill Mapping Function For GPS Tropospheric Delay. In: 2011 Malaysian Technical Universities International Conference on Engineering and Technology, 13-15 November 2011, Katerina Hotel Batu Pahat, Johor.
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Abstract
The refraction of the Global Positioning System (GPS) signal as it passes through the neutral atmosphere from the satellite to the earth can be referred as GPS tropospheric delay, which causes longer distance traveled by the signal. The tropospheric delay is the product of zenith tropospheric delay and mapping function. Many mapping fiinctions have been established for calculating the tropospheric delay at arbitraiy elevation angles. The mapping junctions give large value especially for the elevation angles less than 5 degrees. A transformed Neill Mapping Function (NMF) has been proposed to be an alternative mapping function. The result shows a significant reduction of mapping junction scale factor. As the coefficient of the zenith tropospheric delay, the value of modified mapping function will directly reduce the total tropospheric delay. The transformed Neill Mapping Function has improved the tropospheric delay up to 17.8 percent for two degrees elevation angles, compared to the Neill Mapping Function.
| Item Type: | Conference or Workshop Item (Paper) |
|---|---|
| Subjects: | Q Science > Q Science (General) |
| Divisions: | Faculty of Electrical Engineering > Department of Control, Instrumentation & Automation |
| Depositing User: | Choo Chuan Tay |
| Date Deposited: | 13 Mar 2013 03:06 |
| Last Modified: | 28 May 2015 03:46 |
| URI: | http://eprints.utem.edu.my/id/eprint/6986 |
| Statistic Details: | View Download Statistic |
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