Orthorectification of KOMPSAT Optical Images Using Various Ground Reference Data and Accuracy Assessment

Table 1

Main specifications of KOMPSAT.

Items	KOMPSAT-2	KOMPSAT-3	KOMPSAT-3A
Ground Sample Distance (GSD)	PAN: 1 m @ nadir; MS: 4 m @ nadir	PAN: 0.7 m @ nadir; MS: 2.8 m @ nadir	PAN: 0.55 m @ nadir; MS: 2.2 m @ nadir
Spectral band	PAN: 500~900 nm; MS1 (Blue): 450~520 nm; MS2 (Green): 520~600 nm; MS3 (Red): 630~690 nm; MS4 (NIR): 760~900 nm	PAN: 450~900 nm; MS1 (Blue): 450~520 nm; MS2 (Green): 520~600 nm; MS3 (Red): 630~690 nm; MS4 (NIR): 760~900 nm	PAN: 400~900 nm; MS1 (Blue): 450~520 nm; MS2 (Green): 520~600 nm; MS3 (Red): 630~690 nm; MS4 (NIR): 760~900 nm
Swath width	15 km @ nadir	16 km @ nadir	13 km @ nadir
Altitude	685 km	685 km	528 km
Quantization	10 bits	14 bits	14 bits
Duty cycle	20% per orbit	10% per orbit	10% per orbit