Radiolocation-satellite service

SAR-Lupe (space radio station of the radiolocation-satellite service)

Radiolocation-satellite service (short: RLSS) is – according to Article 1.49 of the International Telecommunication Union´s (ITU) Radio Regulations (RR)^[1] – defined as «A radiodetermination-satellite service used for the purpose of radiolocation. This (radiocommunication) service may also include the feeder links necessary for its operation.»

See also

Classification

This radiocommunication service is classified in accordance with ITU Radio Regulations (article 1) as follows:
Radiodetermination service (article 1.40)

• Radiolocation service (article 1.48)
  • Radiolocation-satellite service (article 1.49)

The radiolocation-satellite service distinguishes basically

• Earth radio stations
• Feeder links and
• Space radio stations

For example military radar sensors in earth satellites operate in the radiolocation-satellite service n this service.

Examples of radio stations in the radiolocation-satellite service 

• 

  "ORS-2" space-based radar
• 

  "NRO Lacrosse" radar satellite
• 

  "ROSAR" radar satellite

List of radar-satellites (not complete)

Name	Country	Sensoric
Lacrosse	USA	military radar (imaging) reconnaissance satellite
SAR-Lupe	Germany	military radar (imaging) reconnaissance satellite
IGS	Japan	radar reconnaissance and optoelectronic reconnaissance
RORSAT	Russian Federation	Radar Ocean Reconnaissance SATellite

Frequency allocation

The allocation of radio frequencies is provided according to Article 5 of the ITU Radio Regulations (edition 2012).^[2]

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 within the responsibility of the appropriate national administration. The allocation might be primary, secondary, exclusive, and shared.

Example of frequency allocation

Allocation to services
Region 1	Region 2	Region 3
24.65-24.75 GHz FIXED FIXED-SATELLITE (Earth-to-space) INTER-SATELLITE	24.65-24.75 INTER-SATELLITE RADIOLOCATION-SATELLITE (Earth-to-space)	24.65-24.75 FIXED FIXED-SATELLITE (Earth-to-space) INTER-SATELLITE MOBILE

References / sources

1. ITU Radio Regulations, Section IV. Radio Stations and Systems – Article 1.49, definition: radiolocation-satellite service
2. ITU Radio Regulations, CHAPTER II – Frequencies, ARTICLE 5 Frequency allocations, Section IV – Table of Frequency Allocations

• International Telecommunication Union (ITU)