Method for determining earth gravitational field based on carrier phase observation value and point acceleration method

• Main Authors: ZHAO YONGQI, WANG JIANQIANG, LU LIGUO, XU XINYU, WU TANGTING
• Format: Patent
• Language: Chinese; English
• Published: 10.12.2019
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETECTING MASSES OR OBJECTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention discloses a method for determining an earth gravitational field based on a carrier phase observation value and a point acceleration method, and relates to the technical field of satellite gravity detection, which comprises the following steps: S1, carrying out data preprocessing on original observation values such as a carrier phase, a geometric orbit, an accelerometer and a satellite attitude; S2, calculating the motion acceleration of the carrier by adopting a carrier phase differential method; S3, according to the Newton's law of motion, establishing an observation equation through carrier motion acceleration and various perturbation accelerations, and calculating the earth gravitational field potential coefficient through a point acceleration method according to the leastsquare criterion. Compared with a classic orbit differential method, the algorithm provided by the invention does not need to estimate the carrier phase integer ambiguity, and the system error between adjacent epochs is effe