Satellite borne distributed interferometric synthetic aperture radar three-dimensional base line calibration method

• Main Authors: CHEN GANG, LIU WEI, ZHANG XIAOWEI, QIAN FANGMING, ZHANG HAO, NIU RUI, LIU ZHIMING, LOU LIANGSHENG
• Format: Patent
• Language: Chinese; English
• Published: 24.08.2018
• 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 present invention relates to a satellite borne distributed interferometric synthetic aperture radar three-dimensional base line calibration method. The method comprises the following steps of: according to echo data of a calibration field, obtaining image coordinates and base line calibration parameters of ground control points; when one or more than one of three axial base line correction absolute values is larger than or equal to a preset threshold value, performing summation of a base line vector initial value and a current base line correction, taking the sum as a new base line vector,and substituting the new base line vector into a base line calibration model for re-calculation; when the three axial base line correction absolute values are all smaller than the preset threshold value, respectively calculating the obtained base line correction sums in each axial direction, and taking the base line correction sums as three final axial base line corrections; and determining a final base line vector accor