The Echo 1A spacecraft was a 30.48 m diameter balloon of mylar polyester film 0.0127 mm thick. The spacecraft was designed as a passive communications reflector for transcontinental and intercontinental telephone (voice), radio, and television signals. It had 107.9 MHz beacon transmitters for telemetry purposes. These transmitters were powered by five nickel-cadmium batteries that were charged by 70 solar cells mounted on the balloon. Because of the large area-to-mass ratio of the spacecraft, data for the calculation of atmospheric density and solar pressure could be acquired. The spacecraft was also used to evaluate the technical feasibility of satellite triangulation during the latter portion of its life. Echo 1 failed during the coast period after launch, as the attitude control jets on the second stage failed and the spacecraft did not achieve orbit. Echo 1A was a successful relaunch.
American orbital launch vehicle. Commercial name for the military's Thor-Delta.
Officially described as "Satellite-Internet Technology Demonstration Satellite(s)". Probable 1 (?) test satellite for the Chinese state-owned LEO com…
2 Earth observation and/or communication satellites for MinoSpace (Tianyan-16) & ELLISPACE (Starpool-01A).
Note: Launch vehicle name is provisional. Prototype small synthetic-aperture radar (SAR) satellite built by Hanhwa Aerospace on a planar satellite…
MisrSat-2 is an Earth observation satellite for the Egyptian Space Agency built by China, with participation from Egyptian engineers and scientists o…
A batch of satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Note: Name of payload is provisional. First launch of an ultimately 5 reconnaissance satellites for the South Korean Defense Acquisition Program A…
Progress resupply mission to the International Space Station.
A batch of 23 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Note: Payload identity and Cosmos series number uncertain. The Razdan satellite is reportedly a new electro-optical reconnaissance satellite desi…
Officially described as "Satellite-Internet Technology Demonstration Satellite(s)" built by Chinese Academy of Sciences. Probable 3 (?) test satellit…