Tight imaging geometric model construction method for ground detection of a satellite-borne microwave remote sensing instrument

• Main Authors: LIU HUAQING, ZHANG JIAN, DONG YAOHAI, LYU WANG, WANG HAO, BIAN ZHIQIANG
• Format: Patent
• Language: Chinese; English
• Published: 24.05.2019
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; CALCULATING; COMPUTING; COUNTING; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRIC DIGITAL DATA PROCESSING; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

The invention relates to a method for constructing a tight imaging geometric model for ground detection of a satellite-borne microwave remote sensing instrument, and belongs to the technical field ofremote sensing instrument modeling methods. The method comprises the following steps: step 1, defining a fixedly-connected coordinate system of each independent component in the instrument; step 2, defining rotation and displacement deformation parameters of each reflecting surface and the feed source; step 3, defining an emergent sight line state vector set of the feed source; step 4, obtaining an emergent line-of-sight state vector set; step 5, constructing a visual vector cluster pointing to a detection target; step 6, converting the visual vector cluster into an earth core fixed connectioncoordinate system; step 7, calculating coordinates of intersection points of the visual vector clusters and the ground surface; step 9, calculating the geographic latitude and longitude of the intersection point; the optical