Derivation of GPS TEC and receiver bias for Langkawi station in Malaysia

[摘要] This paper presents the polynomial-type TEC model to derive total electron content (TEC) and receiver bias for Langkawi (LGKW) station in Malaysia at geographic latitude of 6.32° and longitude of 99.85°. The model uses a polynomial function of coordinates of the ionospheric piercing point to describe the TEC distribution in space. In the model, six polynomial coefficients and a receiver bias are unknown which can be solved by the least squares method. A reasonable agreement is achieved for the derivation of TEC and receiver bias for IENG station in Italy, as compared with that derived by the IGS analysis center, CODE. We process one year of LGKW data in 2010 and show the monthly receiver bias and the seasonal TEC variation. The monthly receiver bias varies between -48 and -24 TECu (1016electrons/m2), with the mean value at -37 TECu. Large variations happen in the monthly receiver biases due to the low data coverage of high satellite elevation angle (60°

[发布机构] Space Science Centre, Institute of Climate Change, Universiti Kebangsaan Malaysia, Malaysia^1;General Education Center, Chien Hsin University of Science and Technology, Taiwan^2

[效力级别] 无线电电子学

[关键词] Annual variations;Elevation angle;Least squares methods;Polynomial coefficients;Polynomial functions;Post processing;Total electron content;Winter months