METHOD FOR CALCULATING EFFECTIVE VELOCITY FOR PROCESSING SIGNAL OF SATELLITE SAR

• Main Authors: KIM, DONG HYUN, LIM, BYOUNG GYUN, YOON, JAE CHEOL
• Format: Patent
• Language: English; Korean
• Published: 08.12.2016
• 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 method for calculating an effective velocity to process a signal of an image radar for a satellite, capable of very accurately calculating effective velocity with a small calculation rate. According to the present invention, the method for calculating an effective velocity to process a signal of an image radar for a satellite includes: (a) a step of forming a Pythagorean theorem mathematical formula to calculate a range by using the effective velocity; (b) a step of performing partial differentiation on the Pythagorean theorem mathematic formula and changing the Pythagorean theorem mathematic formula to a partial differential formula; (c) a step of individually forming a formula on bearing time ta1 and ta2 by substituting the bearing time ta1 and ta2 to the partial differential formula; (d) a step of forming an effective velocity (V_e) equation by combining two formulas on the ta1 and ta2; (e) a step of calculating R which is a parameter of the effective velocity (V_e) equation; and (f) a step of calculating the effective velocity by substituting the parameter R to the effective velocity (V_e) equation. 본 발명에 따른 위성용 영상레이더 신호처리를 위한 효과 속도 계산 방법은 (a) 효과속도(Effective Velocity)를 사용하여 Range를 계산하기 위한 피타고라스 정리 수식을 세우는 단계; (b) 상기 피타고라스 정리 수식을 편미분하여 편미분식으로 변경하는 단계; (c) 상기 편미분식에 임의의 방위시간 ta1과 ta2를 대입하여 상기 방위시간 ta1과 ta2에 대한 식을 각각 세우는 단계;(d) 상기 ta1과 ta2에 대한 두 식을 연립하여 효과속도(V) 방정식을 세우는 단계; (e) 상기 효과속도(V) 방정식의 파라미터인 `R`을 계산하는 단계; 및 (f) 상기 파라미터 `R`을 상기 효과속도 방정식(V)에 대입하여 효과속도를 계산하는 단계;를 포함하여 작은 계산량으로, 매우 정확하게 effective velocity를 구할 수 있는 효과가