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A star tracker is an optical device that measures the positions of stars using photocells or a camera. [1] As the positions of many stars have been measured by astronomers to a high degree of accuracy, a star tracker on a satellite or spacecraft may be used to determine the orientation (or attitude ) of the spacecraft with respect to the stars.
Volunteer satellite trackers in Pretoria, South Africa. Operation Moonwatch (also known as Project Moonwatch and, more simply, as Moonwatch) was an amateur science program formally initiated by the Smithsonian Astrophysical Observatory (SAO) in 1956. [1]
Cadillac Sixty Special (1950-1953) Checker Model A3/A4 (1950-1952) Chrysler Town & Country (1950-1959) Ford Country Squire (1950–1951) Ford Crestliner (1950–1951) International L Series Metro Van (1950-1952) Nash Rambler (1950–1952) Oldsmobile "Rocket" Deluxe Holiday 88 (1950) Pontiac Catalina (1950-1958) Volkswagen Type 2 (1950–1967 ...
The second one flew a track at 10,000 feet (3,000 m) (Bravo orbit) farther from the coast, acting as a spare for the Alpha EC-121. [4] This provided a practical detection range of 100 miles (160 km), enough to cover the Hanoi urban area and the main MiG base at Phúc Yên. A major disadvantage of this arrangement, however, was that most MiG ...
The remaining instruments and a second star tracker point out of the image toward the viewer. The four solar panels charged batteries during orbit day. The Small Astronomy Satellite 3 ( SAS 3 , also known as SAS-C before launch) (Explorer 53) was a NASA X-ray astronomy space telescope . [ 1 ]
This list of British Vogue cover models 1950–present is a catalogue of cover models who have featured on the cover of British Vogue. 1940s. Issue Cover model
The Mark III modified projector installed in the Planetario Humboldt 1950 in Caracas - Venezuela.It is the oldest in Latin America. Marks II through VI utilized two small spheres of lenses separated along a central axis. Beginning with Mark VII, Zeiss projectors adopted a new, egg-shaped design.
The name International was first used by Norton both for its newly designed race bikes and also for the TT replica sports roadster in 1932. Overseen by Joe Craig, Arthur Carroll had designed an overhead-camshaft engine for the works racers and although it retained the 79 mm × 100 mm (3.1 in × 3.9 in) bore and stroke of the Norton CS1 the Model 30 International was all new.