衛星特性－orbits and swaths：2軌道間距離的計算、Nadir、orbit cycle 與Revisit period、new area with each consecutive pass、overlap in adjacent swaths

spatial resolution空間解析度, pixel size像素大小, and scale比例尺：instantaneous field of view、coarse or low resolution vs. fine or high resolution、何謂比例尺、表示形式、Max pixel size(200Mm)、IFOV、image resolution 與coverage、object space與image space

spectral resolution：different rock types的反射力、multi-spectral resolution

radiometric resolution感應器的靈敏度：signed to noise retie、grey level ( No. of bits)