Journal ArticleDOI
Estimation of the transmitter and receiver differential biases and the ionospheric total electron content from Global Positioning System observations
TLDR
In this paper, a method based on a Kalman filtering approach was proposed to estimate the biases in the GPS satellites and receivers and the total electron content at each GPS station using dual GPS data.Abstract:
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 0.2×1016 el/m2, 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.read more
Citations
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Journal ArticleDOI
A global mapping technique for GPS‐derived ionospheric total electron content measurements
TL;DR: In this paper, a technique for retrieving the global distribution of vertical total electron content (TEC) from GPS-based measurements is described, based on interpolating TEC within triangular tiles that tessellate the ionosphere modeled as a thin spherical shell.
Journal ArticleDOI
The IGS VTEC maps: a reliable source of ionospheric information since 1998
Manuel Hernández-Pajares,Jesús Juan,Jaume Sanz,R. Orus,Alberto García-Rigo,J. Feltens,Attila Komjathy,Stefan Schaer,Andrzej Krankowski +8 more
TL;DR: In this article, the IGS combined vertical total electron content (VTEC) maps were analyzed and the results confirmed the good performance of the combined VTEC maps, and the characteristic VTEC variability periods.
Journal ArticleDOI
Calibration errors on experimental slant total electron content (TEC) determined with GPS
TL;DR: The conclusions achieved are: (1) the levelled carrier-phase ionospheric observable is affected by a systematic error, produced by code-delay multi-path through the levelling procedure; and (2) receiver IFB may experience significant changes during 1 day.
Journal ArticleDOI
Pre-earthquake ionospheric anomalies registered by continuous GPS TEC measurements
TL;DR: In this paper, the authors examined pre-earthquake ionospheric anomalies by the total electron content (TEC) derived from a ground-based receiver of the Global Positioning System (GPS).
Journal ArticleDOI
Automated GPS processing for global total electron content data
TL;DR: The architecture of the MAPGPS software, which automates the processing of GPS data into global total electron density (TEC) maps, is described and three different methods for solving the receiver bias problem are described in detail.
References
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Journal ArticleDOI
An Automatic Editing Algorithm for GPS data
TL;DR: An algorithm has been developed to edit automatically Global Positioning System data such that outlier deletion, cycle slip identification and correction are independent of clock instability, selective availability, receiver–satellite kinematics, and tropospheric conditions.
Journal ArticleDOI
A comparison of mapped and measured total ionospheric electron content using global positioning system and beacon satellite observations
Gabor E. Lanyi,Titus Roth +1 more
TL;DR: In this article, a set of these GPS TEC measurements were mapped from the GPS lines of sight to the line of sight of a Faraday beacon satellite by statistically fitting the TEC data to a simple model of the ionosphere.
Journal ArticleDOI
Geodesy by radio interferometry: The application of Kalman Filtering to the analysis of very long baseline interferometry data
TL;DR: In this paper, an implementation of a Kalman filter to account for stochastic behavior on those parameters which vary during the course of a VLBI experiment is discussed, and the nature of the stochastically processes which should be used in the model for the VLIBI data and the implementation of the Kalman Filter estimator are considered.
Journal ArticleDOI
Variability of GPS satellite differential group delay biases
TL;DR: In this paper, the day-to-day variations of the satellite differential biases are measured and removed from the GPS measurements before an accurate estimate of the total electron content can be obtained.
Sub-Daily Northern Hemisphere Ionospheric Maps Using a World-Wide Network of GPS Receivers
TL;DR: Ionospheric total electron mapping content (TEC) data derived from dual-frequency Global Positioning System (GPS) signals from 30 globally distributed network sites are fit into a simple ionospheric shell model.
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