The cloud figure is a qualifier parameter, just that. The acquisition will not be planed if you have configured the sensor with a Cloud Constraint and the cloud figure is out of the defined bounds See more here: http://1.help.taitussoftware.com/SaVoir/help/content/6.advanced/constraints/clouds/clouds.htm what is the meaning of Fore and AFT angle of sensor between -90deg and 90deg, is it applicable to non-stereo satellites also? what is minimum area coverage requirement ? What is difference between minimum coverage and minimum target?