Scanning System-induced Variation in Ground Resolution Cell Size The ground resolution cell size along a single across-track scan is a function of a) the distance from the aircraft to the observation where H is the altitude of the aircraft above ground level (AGL)at nadir and H sec f off-nadir; Total field b) the instantaneous-field-of-view of the of view of sensor,b,measured in radians;and one scan line c) the scan angle off-nadir,f.Pixels off- =Hsec nadir have semi-major and semi-minor B axes (diameters)that define the Instantaneous 4 field of view resolution cell size.The total field of Scan angle view of one scan line is q. off-nadir (H sec B (H sec)B D=BxH at nadir Lime of flight 55 Scanning System-induced Variation in Ground Resolution Cell Size The ground resolution cell size along a single across-track scan is a function of a) the distance from the aircraft to the observation where H is the altitude of the aircraft above ground level (AGL) at nadir and H sec f off-nadir; b) the instantaneous-field-of-view of the sensor, b, measured in radians; and c) the scan angle off-nadir, f. Pixels off￾nadir have semi-major and semi-minor axes (diameters) that define the resolution cell size. The total field of UESTC-RSIP view of one scan line is q