The Echo 1 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.
16 new Earth observation satellites for the Jilin-1 commercial Earth observation satellites constellation.
A batch of 52 satellites for Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
Khayyam, also known as Project 505, is a Russian built Earth observation satellite for Iran. The satellite is built by VNIIEM and NPK Barl on a curre…
Two commercial Earth observation satellites built by Minospace.
First test flight of Indian SSLV (Small Satellite Launch Vehicle).
Lunar orbiter designed by the Korea Aerospace Research Institute (KARI) to demonstrate technologies, survey lunar resources and produce a topographic…
Note: Launch time is approximate. Probable reflight of the Chinese spaceplane capable of returning to Earth, which flew in orbit September 4 - 6, …
NS-22 is the sixth crewed New Shepard flight, carrying six passengers.
Sixth geosynchronous satellite of the Space Based Infrared System program (SBIRS), providing capabilities for early missile warning and missile defen…
Classified payload for the US National Reconnaissance Office (NRO).