****************************************************************************** BSW Electronic Mail 30-Oct-1998 10:05:04 CET Message Number 0048 ****************************************************************************** Author: Jaroslaw Bosy Subject: Ambiguity resolution problem Suject: Ambiguity resolution problem Hi, We are processing GPS observation of the network with baselines from several km to about 100 km. Observations were done by mixed: Z-12 and MD12 Ashtech dual frequency reveivers (MD12 - only C/A code on L1, without P- code on L1 and L2). Session lenght about four hours. We have troubles with ambiguity resolution. Using QIF only baselines with both Z-12 are resolved. SIGMA strategy resolves the ambiguities but sigmas of single difference observations are rather too big (several centimetres for short baselines). Maybe somebody have experiences with resolving this problem. Jarek ====================================================================== Dr. Jaroslaw Bosy Department of Geodesy and Photogrammetry Agricultural University of Wroclaw Grunwaldzka 53, 50-357 Wroclaw, Poland Phone: +48 71 205-688 Fax: +48 71 205-617 E-mail: Jaroslaw_Bosy@ar.wroc.pl ====================================================================== [Mailed from: Jaroslaw Bosy ]