Hi,\r\nI want to use RTCM correction data to get corrected position of GPS rover. There are different message types in RTCM data. As i know types 1, 2, 9 and 21 are related with DGPS correction data. I want to know the procedure to get the corrected position using that RTCM messages, e.g. what meassge type(s)should be used, what exactly shoulşd be done wit the correction data, is there some document tells about that?