Earth Planets Space, Vol. 52 (No. 10), pp. 675-680, 2000LETTER
Department of Mathematical Geodesy and Positioning, Delft University of Technology, Thijsseweg 11, 2629 JA Delft, The Netherlands
(Received January 6, 2000; Revised June 26, 2000; Accepted July 5, 2000)
Abstract: Fast and high precision relative GPS positioning over distances up to 100 km is mainly limited by errors in the GPS signals due to propagation through the Earth's ionosphere. With permanent GPS arrays, which are present in many countries nowadays, it becomes possible to correct a user's GPS measurements to a certain extent for these ionospheric delays. A way to do so is to interpolate the ionospheric delays which have been estimated from the network of permanent stations. When these `interpolated corrections' are applied to the user's data, the ionospheric delays may be reduced, which may lead to an improved ambiguity resolution for his (long) baseline.