Sea tide mixing error estimation method in satellite gravity measurement

• Main Authors: CHANG XIAOTAO, LIU WEI, CHEN HUI, XIE JUNFENG, MO FAN, ZHU GUANGBIN, TANG HONGZHAO, DOU XIANHUI
• Format: Patent
• Language: Chinese; English
• Published: 18.11.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; DETECTING MASSES OR OBJECTS; ELECTRIC DIGITAL DATA PROCESSING; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; MEASURING; PHYSICS; TESTING

The invention discloses a sea tide mixing error estimation method in satellite gravity measurement. The method comprises the following steps: determining a satellite orbit sampling process of a gravity satellite task; determining inversion period sampling processes of different gravity inversion processes; calculating the mixing frequency of each sea tide component according to the satellite orbit sampling process and the inversion period sampling process; and measuring the mixing error of the medium-high frequency sea tide signal by using the estimated satellite gravity. According to the gravity satellite task, frequency mixing can be generated due to undersampling of high-frequency sea tide signals in two processes, one process is orbit sampling, the other process is gravity period inversion sampling, the first frequency mixing frequency and the second frequency mixing frequency can be estimated by determining the signal frequency and the sampling frequency of each process, and the frequency mixing accuracy