On the situation of increase energy integral time for imaging spectrometers with motion compensation

first

deduced the general expressions of the ground resolution and the telescope focal length. Second

calculated that concretely. The result indicates that ground resolution is inverse proportion to pointing angle for imaging spectrometers with motion compensation. Viz.

the ground resolution will decrease when pointing angle increases

vice versa. That needs synthesize applied requirement

system quality and volume etc.

to choose appropriate telescope focal length.