Mathematical Modelling Of Neill Mapping Function For Global Posittion System (GPS) Tropospheric Delay

Nor Afifah, Zakaria (2012) Mathematical Modelling Of Neill Mapping Function For Global Posittion System (GPS) Tropospheric Delay. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

The purpose of this project is to modify a mathematical model on a mapping function models to improve the calculation of the GPS tropospheric delay. Mapping function scale factor can be used to amplify the zenith tropospheric delay to form total tropospheric delay. Mapping functions for the hydrostatic and the wet part are usually separated and mostly the tropospheric delay models use mapping functions in the form of continued fractions which is quite tedious in calculation. Mapping function values can be obtained after 26 mathematical operations for Neill Mapping Function (NMF). There is a need to modify the mapping function models to allow faster calculation and also better understanding of the models. The mapping functions for NMF models for hydrostatic and wet components are given in a form of continued fraction, whereby the elevation angle is the variable. NMF is selected due to its ability to measure the mapping function down to 3 elevation angle.

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