For single-frequency global positioning system (GPS) users,uncompensated ionospheric GPS-signal time delay is the largestsource of range-measurement error, contributing as much as 100 m.To improve performance for these users, a numeric model of theionospheric range error was incorporated into the GPS system. Thispaper presents an assessment of that model in which actualionospheric time-delay values as measured by GPS dual-frequencyreceivers were compared with model values computed at the sametime points. Comparison was made over a broad range of conditionswith dependency of model accuracy on several of the modelparameters. It appears that the model leads to an overall reductionin rms range measurement error of 60 percent.
Evaluation of GPS Ionospheric Time-Delay Model
IEEE Transactions on Aerospace and Electronic Systems ; AES-23 , 3 ; 332-338
1987-05-01
2030668 byte
Article (Journal)
Electronic Resource
English
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