Garpun (14F136) data relay satellite
IDRSS Indian Data Relay Satellite System - YouTube
Tracking and Data Relay Satellite (TDRS) | NASA
Japan launches JDRS-1 optical data relay satellite for military, civilian use - SpaceNews
U.S. tracking and data relay satellite - Wikipedia
ESA - The European Data Relay Satellite System – EDRS
Tracking and Data Relay Satellite (TDRS) | NASA
What is a relay satellite? | NASA
Sky Perfect JSAT and NTT Form Space Compass to Establish an Optical Data Relay Network - Via Satellite -
ESA - Data-relay satellite ready for service
Data relay satellite system with hybrid light-links and microwave-links. | Download Scientific Diagram
Europe Eyes Expanded Data-relay Service - SpaceNews
Tracking and Data Relay Satellite System - Wikipedia
The European Data Relay System (EDRS) - DLR Portal
Inmarsat and AVI's satellite data-relay service exits stealth mode after months of secret, in-space tests - SpaceNews
ESA - Overview
Competition is growing in the space-data-relay sector - SpaceNews
SpaceLink and U.S. Army to study use of relay constellation to deliver data to troops in the field - SpaceNews
What is the European Data Relay System? - YouTube
Tracking and Data Relay Satellite (TDRS) Third Generation Capabilities | NASA
What is a relay satellite? | NASA
Tracking and Data Relay Satellite System (TDRS) - General Dynamics Mission Systems
What is a relay satellite? | NASA
How NASA's TDRS Communications Satellites Work (Infographic) | Space
