Inter-satellite service, also known as inter-satellite radiocommunication service, as defined by Article 1.22 of the International Telecommunication Union's (ITU) Radio Regulations (RR), is a radiocommunication service providing links between artificial satellites.^[1]

In accordance with ITU Radio Regulations (article 1) variations of this radiocommunication service are classified as follows:

• Fixed service (article 1.20)
  • Fixed-satellite service (article 1.21)
  • Inter-satellite service (article 1.22)
  • Earth exploration-satellite service (article 1.51)
    • Meteorological-satellite service (article 1.52)

• U.S. Tracking and Data Relay Satellite
• Artemis (satellite)
• European Data Relay System
• Indian Data Relay Satellite System
• Luch (satellite) (Russia)
• Tianlian I (China)

• Iridium
• Starlink
• Kuiper Systems

• Communications satellite
• Radio station
• Wireless mesh network
• Laser communication in space

• International Telecommunication Union (ITU)
• Earth exploration-satellite service. ITU, Genf 2011. ISBN 92-61-13761-X