GPS Carrier Phase Positioning Technology In Airborne Gravimetry

The thesis set the GT-1A airborne gravity measurement system which was introduced by China in 2007 from Russian research institutes as background,and based on the GT-1A measured GPS data in Nantong. Focuses on carrier phase positioning.In this thesis, the author firstly introduced the airborne gravity measurement system, the basic method of airborne gravimetry and the GPS in the airborne gravimetry measurement; secondly, it is necessary to get satellite coordinates in WGS-84 and the algorithm implementation of standardization of orbits of GPS satellites; thirdly, the author analyzed the mathematic model of GPS positioning phase observation, and discussed the ambiguity to obtain the correlation method. Finally give out the result of the airplane through the program of the least square method, and applied to an instance of Nantong flight data. The main contents are as follows:1. Introduced the composition of airborne gravimetry measurement system, the basic theory and work measures of airborne gravimetry, and data processing solution.2. Introduced the WGS-84 geodetic coordinate system and the corresponding coordinate system, Calculated satellite coordinates in WGS-84 and the algorithm implementation of standardization of orbits of GPS satellites.3. Studied the GPS carrier phase positioning theory and calculated the approaches mathematic models of the corresponding error equations.4. Discussed the solution method of the ambiguity in the observation domain,coordinate domain, ambiguity domain. And used the dual-frequency P code method to do the relevant simulation.5. Achieved the program and used the actual measurement data in Nantong, and analyzed the results to the original results were compared.