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Estimation of the transmitter and receiver differential biases and the ionospheric total electron content from Global Positioning System observations
Author(s) -
Sardón E.,
Rius A.,
Zarraoa N.
Publication year - 1994
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/94rs00449
Subject(s) - global positioning system , total electron content , satellite , ionosphere , remote sensing , transmitter , kalman filter , geodesy , environmental science , content (measure theory) , computer science , statistics , tec , mathematics , geography , physics , telecommunications , astronomy , channel (broadcasting) , mathematical analysis
In the estimation of the ionospheric total electron content from the Global Positioning System (GPS) observables, various instrumental systematic effects such as the biases in the GPS satellites and receivers must be modeled. This paper describes a procedure, based on a Kalman filtering approach, for estimating these instrumental biases as well as the total electron content at each GPS station, using dual GPS data. The method is applied to six data sets, of 48 hours each, spanning one year, from the Deep Space Network with GPS stations in Australia, Spain, and the United States. The formal errors for the estimated satellite biases and for the total electron content at each station are about 0.07 ns and 0.2×10 16 el/m 2 , respectively. The variation in time of the satellite biases (relative to the mean of all of them) estimated in different epochs during 1‐year period, is below 1 ns.