RPC1 MAKES GOOD MEMES; THAT'S BECAUSE RPC MODEL FORMS THE CO-ORDINATES OF THE IMAGE POINT AS RATIOS OF THE CUBIC POLYNOMIALS IN THE CO-ORDINATES OF THE WORLD OR OBJECT SPACE OR GROUND POINT. A SET OF IMAGES IS GIVEN TO DETERMINE THE SET OF POLYNOMIAL COEFFICIENTS IN THE RPC MODEL TO MINIMISE THE ERROR.