Multi-channel polarized SAR (Synthetic Aperture Radar) system and method for simultaneously realizing along-track and tangent-track interference

• Main Authors: HUANG LONG, XIA XUE, CHEN GANG, DONG XIAOHUAN, MIAO YUZHE, ZHAO HAOHAO, LIU ZHIMING, LIU AIFANG, LOU LIANGSHENG, WANG DING
• Format: Patent
• Language: Chinese; English
• Published: 01.11.2022
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; 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 multi-channel polarized SAR (synthetic aperture radar) system and method for simultaneously realizing along-track and tangent-track interference, and the system comprises two sets of X-band fully-polarized antennas, two sets of X-band frequency conversion receivers, a set of digital single machine, a set of reference source, a set of excitation source, a set of internal calibrator, two sets of wave control machines, two sets of servo and two sets of position and attitude measurement devices. Comprising an SAR mode, a reference calibration mode, a receiving calibration mode, a transmitting calibration mode, formation of along-track and tangent-track interference baselines, design of a high-precision time-sharing internal calibration time sequence, keeping of signal consistency, avoidance of aliasing of calibration signals, design of a unified transceiving time sequence of two antennas, avoidance of overlapping of transmitting and receiving windows, and unified control of beam pointing