A Long March 3B launched from Xichang on December 9, deploying the TJSW-22 Communication Technology Test Satellite into a geostationary transfer orbit.
The Long March 5 launch successfully sent the communications technology test satellite TJS-20 into geosynchronous transfer orbit.
China Satellite Network Group achieved a world first by completing a broadband video call through a 5G non-terrestrial network standard using a technology test satellite.
The Optical Inter-Satellite Communication Engineering Test Satellite (OICETS) was launched by JAXA on a Dnepr rocket in 2005.
One satellite in the sixth group, named Peking University Spacetime Star 01 Test Satellite, is a test satellite for complex communication technologies.
China launched a new communication engineering test satellite on 2024-12-03 identified as communication technology experiment Satellite-13 (Tongxin Jishu Shiyan-13, TJS-13).
Lunasonde’s next 1U test satellite Phoenix is scheduled to launch in July 2024 on PSLV.
Open Cosmos provided Sateliot’s first test satellite and Endurosat built Sateliot’s second test satellite.
China launched an undisclosed number of satellites on 2023-11-23 to test satellite internet technologies.
AST SpaceMobile demonstrated space-based 0.005 kg connectivity using its BlueWalker 3 test satellite, which is the largest-ever commercial communications array deployed in low Earth orbit.
AST SpaceMobile engineers placed a space-based 0.005 kg call from Maui, Hawaii to a Vodafone engineer in Madrid using AT&T spectrum and the BlueWalker 3 test satellite.
AST SpaceMobile made its first voice call in April using a standard smartphone and its BlueWalker 3 test satellite in LEO.
The second Apogeo test satellite, FEES2, was deployed from the International Space Station in early 2022 after being delivered by SpaceX.
Luojia-2 (01) is a Ka-band synthetic aperture radar test satellite built by Wuhan University with a mass of 353 kg.
AST SpaceMobile, in partnership with AT&T and Japanese telco Rakuten, made its first voice call on 2023-04-20 using an unmodified Samsung Galaxy S22 smartphone and the BlueWalker 3 test satellite.
AST SpaceMobile made the first voice call with a standard smartphone using its BlueWalker 3 test satellite in low Earth orbit on 2023-04-20.
AST SpaceMobile will upload predicted trajectory information on an ongoing basis for its BlueWalker 3 test satellite and planned BlueBird satellites to Space-Track.org with the U.S. Space Force.
AST SpaceMobile will launch its BlueWalker 3 test satellite later 2022 to begin global testing with mobile network operators on six continents.
AST SpaceMobile expects SpaceX to launch the BlueWalker 3 test satellite for its cellphone-compatible constellation in the week of 2022-08-15.
A performance test satellite was deployed from KSLV-2 about 14 minutes after liftoff on 2024-06-21.