Earth exploration-satellite service
Earth exploration-satellite service (also: Earth exploration-satellite radiocommunication service) is – according to "Article 1.51" of the International Telecommunication Union's (ITU) Radio Regulations (RR) – defined as: A radiocommunication service between earth stations and one or more space stations, which may include links between space stations, in which: This service may also include feeder links necessary for its operation. Classification. This "radiocommunication service" is classified in accordance with "ITU Radio Regulations" (article 1) as follows: Fixed service (article 1.20) Frequency allocation. The allocation of radio frequencies is provided according to "Article 5" of the ITU Radio  Regulations (edition 2012). In order to improve harmonisation in spectrum utilisation, the majority of service-allocations stipulated in this document were incorporated in national Tables of Frequency Allocations and Utilisations which is with-in the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared. However, military usage, in bands where there is civil usage, will be in accordance with the ITU Radio Regulations. Classification. In accordance with "ITU Radio Regulations" (article 1) variations of this "radiocommunication service" are classified as follows: "Fixed service" (article 1.22)