Present and future of allocation and protection of earth observation using constellation

In the operation of spaceborne optical sensor, it is necessary to increase time resolution due to cloud coverage. As for spaceborne radio sensor, it is necessary to observe different time due to changeable targets. In these cases, more constellations and higher performance will be needed in the future. Active radio sensor should have sufficient bandwidth and should protect other services. On the other hand, passive radio sensor should be protected from the interference of other services. Overall allocation and interference issues for active and passive radio sensors and their constellation are studied for the first time.