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.
A batch of 53 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
A batch of 49 satellites for the Starlink mega-constellation - SpaceX's project for space-based Internet communication system. This launch carries…
A batch of 56 satellites for Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
The IGS-Radar 7 is a Japanese radar reconnaissance satellite. The satellite is operated by the Cabinet Satellite Information Center. The satellite se…
Rideshare mission with 3 HawkEye 360 satellites and other payloads.
A batch of satellites for Starlink mega-constellation - SpaceX's project for space-based Internet communication system.
GPS-IIIA (Global Positioning System) is the first evolution stage of the third generation of the GPS satellites. It consists of the first ten (known …
USSF-67 is a mission for the United States Space Force with two satellites, including the LDPE-3A rapid prototype platform hosting 5 USSF payloads.
This launch carries multiple payloads, including 6 new satellites for the Jilin-1 commercial Earth observation satellite constellation and Qilu-2/3, …
Yaogan 37 is a Chinese military reconnaissance satellite. Shiyan 22A/B are 2 small Earth observation satellites built by SAST (SY-22A) & CAS (SY-22B).