Earth Planets Space, Vol. 60 (No. 11), pp. e25-e28, 2008E-LETTER
Chang-Ki Hong1, Dorota A. Grejner-Brzezinska2, and Jay Hyoun Kwon1
1Department of Geoinformatics, The University of Seoul, Siripdae-gil 13, Dongdaemun-gu, Seoul 130-743, Korea
2Department of Civil and Environmental Engineering and Geodetic Science, The Ohio State University, Columbus, Ohio 43210, USA
(Received June 25, 2008; Revised October 27, 2008; Accepted November 4, 2008; Online published November 13, 2008)
A new and efficient algorithm using the geometry conditions between satellite and tracking receivers is proposed to determine the receiver differential code bias (DCB) using permanent reference stations. This method does not require a traditional single-layer ionosphere model and can be used for estimating DCBs of receivers in a regional network as long as one of the receiver DCBs is already known. The main underlying rationale for this algorithm is that the magnitude of the signal delay caused by the ionosphere is, under normal conditions, highly dependent on the geometric range between the satellite and the receiver. The proposed algorithm was tested with the Ohio Continuously Operating Reference Stations (CORS) sub-network data. The results show that quality comparable to the traditional DCB estimation method is obtainable by implementing this simple algorithm.
Key words: GPS, receiver DCB, ionosphere modeling, CORS.