Abstract: Aiming to the on orbit calibration of K band microwave antenna phase center for low low tracking gravity spacecraft formation mission, the formation ranging system composition and the far field radiation model of K band antenna phase center are analyzed, and the on orbit calibration period maneuver design of phase center is given; the on orbit calibration algorithm is designed by using batch estimation theory, and the optimal fusion estimation method under the condition of multiple maneuver data is given. The simulation results verify the effectiveness of the proposed on orbit calibration algorithm for K band antenna phase center.

Key words: low low tracking, K band, gravity field measurement, spacecraft formation flying, phase center calibration