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A spacecraft's attitude must typically be stabilized and controlled for a variety of reasons. It is often needed so that the spacecraft high-gain antenna may be accurately pointed to Earth for communications, so that onboard experiments may accomplish precise pointing for accurate collection and subsequent interpretation of data, so that the heating and cooling effects of sunlight and shadow ...
Controlled implosion after aircraft crash caused serious damage five days earlier Rebuilt in 2003, the new tower has almost the same height, i.e. 326.8 m (307.1 m for the structure, but the antenna is shorter (19.7 m)). Angara transmitter, Northern Mast, Angara, Russia June 6, 2001: Guyed steel lattice mast carrying a T-antenna 205
Galileo 's star scanner was a small optical telescope that provided an absolute attitude reference, but it made several scientific discoveries serendipitously. In the prime mission, it was found that the star scanner was able to detect high-energy particles as a noise signal.
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StarFire is a wide-area differential GPS developed by John Deere's NavCom and precision farming groups. StarFire broadcasts additional "correction information" over satellite L-band frequencies around the world, allowing a StarFire-equipped receiver to produce position measurements accurate to well under one meter, with typical accuracy over a 24-hour period being under 4.5 cm. StarFire is ...
Its callsign is GQD. [5] VLF transmissions are relatively unaffected by atmospheric nuclear explosions and Anthorn was once part of the link between Fylingdales early warning radar, North Yorkshire, and the United States' air defence system. [6] A large part of the site is taken up by the VLF transmitter's large trideco wire umbrella antenna. [4]
The antenna uses a microwave lens 560 km in diameter, would transmit 56 GW of power, and would accelerate the probe to 10% of the speed of light. The probe would cruise without power for decades until it finally approached the target star, at which point the antenna which launched it would again target its beam on Starwisp. This would be done ...
On March 6, 2021, Globalstar announced to customers that the Sat-Fi2 (Satellite Wifi Hotspot) and Sat-Fi2 RAS (Remote Antenna Station) services would be discontinued as of March 12, 2021. On September 7, 2022, Apple announced a cooperation with Globalstar Inc that "would allow iPhone 14 users to send emergency messages" via satellite, starting ...