Satellite images are based on data obtained by (gps/landsat) satellites.

Satellite images are based on data obtained by landsat satellites. 

I’d say platform as a service (paas) or application platform as a service (apaas) or platform base service is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage applications without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.