Project Project Concept Environment Scenario Data rate Supplier Status European Data Relay System (EDRS)[lower-alpha 1] Data relay to GEO satellites from LEO Earth observation satellites and for intelligence, surveillance and reconnaissance missions GEO, LEO Space-to-space 1.8 Gbit/s Tesat-Spacecom[40] Operational SDA National Defense Space Architecture Proliferated LEO constellation consisting of multiple layers serving needs of the U.S. Department of Defense[41] LEO Space-to-space Development DARPA Blackjack Risk reduction efforts to test the viability of new military space capabilities provided by emerging commercial LEO constellations[41] LEO Space-to-space Mynaric,[42] SA Photonics[43] Development Laser Light Communications Satellite constellation for global telecommunications building an optical backbone network in space MEO Space-to-space, Space-to-ground 100 Gbit/s[44] Ball Aerospace & Technologies[45] Development WarpHub InterSat Inter satellite data relay for LEO Earth observation satellites, space-to-ground communication uses RF.