Earth exploration-satellite service

A radiocommunication service between Earth stations and one or more space stations, which may include links between space stations, in which:

• information relating to the characteristics of the Earth and its natural phenomena is obtained from active sensors or passive sensors on Earth satellites;
• similar information is collected from airborne or Earth-based platforms;
• such information may be distributed to Earth stations within the system concerned;
• platform interrogation may be included.

This service may also include feeder links necessary for its operation. [NTIA] [RR]