The Algorithm of Single-epoch Integer Ambiguity Resolution between Middle-range BDS Network RTK Reference Stations

• Main Authors: ZHU Huizhong, XU Aigong, GAO Meng, YANG Qiushi
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2016-01-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: BDS; network RTK; single-epoch; integer ambiguity; ionosphere delay error
• Online Access: http://html.rhhz.net/CHXB/html/2016-1-50.htm

The algorithm of double frequency carrier phase integer ambiguity resolution between middle-range reference stations at single-epoch is proposed. The ambiguity candidates of B1 frequency and B2 frequency carrier phase are selected by linear relationship between carrier phase ambiguities of B1 frequency and B2 frequency carrier phase. The double difference ionosphere delay errors can be calculated by the ambiguity candidates of double frequency carrier phase. Then the linear calculation model of double difference ionosphere delay errors can be established by the double difference ionosphere delay errors according to the spatial relationship between the ionosphere delay errors of each satellites on reference stations. And the ambiguities of B1 frequency and B2 frequency carrier phase are searched and fixed in the establishing of the linear calculation model of double difference ionosphere delay errors. This algorithm is tested by the data of BDS CORS network. The results indicate that the double difference integer ambiguity between reference stations can be fixed at single-epoch, and this algorithm avoids the effect of cycle clips.