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Ionospheric Time-Delay Algorithm for Single-Frequency GPS Users

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1 Author(s)
Klobuchar, J.A. ; Air Force Geophysics Laboratory

The goal in designing an ionospheric time-delay correctionalgorithm for the single-frequency global positioning system userwas to include the main features of the complex behavior of theionosphere, yet require a minimum of coefficients and usercomputational time, while still yielding an rms correction of at least50 percent. The algorithm designed for this purpose, andimplemented in the GPS satellites, requires only eight coefficientssent as part of the satellite message, contains numerousapproximations designed to reduce user computationalrequirements, yet preserves the essential elements required to obtaingroup delay values along multiple satellite viewing directions.

Published in:

Aerospace and Electronic Systems, IEEE Transactions on  (Volume:AES-23 ,  Issue: 3 )

Date of Publication:

May 1987

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