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A Molniya orbit (Russian: Молния, IPA: [ˈmolnʲɪjə] ⓘ, "Lightning") is a type of satellite orbit designed to provide communications and remote sensing coverage over high latitudes. It is a highly elliptical orbit with an inclination of 63.4 degrees , an argument of perigee of 270 degrees, and an orbital period of approximately half a ...
The first Molniya 2 satellites were tested from 1971 with the first operational satellite launching in 1974 from Plesetsk. The used the same satellite bus and basic design as later model Molniya 1 satellites, but with an expanded number of users under the military's Unified System of Satellite Communications (YeSSS) program. Development was ...
A highly elliptical orbit (HEO) is an elliptic orbit with high eccentricity, usually referring to one around Earth.Examples of inclined HEO orbits include Molniya orbits, named after the Molniya Soviet communication satellites which used them, and Tundra orbits.
A satellite ground track may be thought of as a path along the Earth's surface that traces the movement of an imaginary line between the satellite and the center of the Earth. In other words, the ground track is the set of points at which the satellite will pass directly overhead, or cross the zenith, in the frame of reference of a ground observer.
English: View of the Earth from the apogee of a Molniya orbit under the assumption that the longitude of the apogee is 90 deg W. The spacecraft is at an altitude of 39867 km over the point 90 deg W 63.43 deg. N
A total of 7 Molniya-1 satellites were launched, 5 of them successfully. In 1966, due to the heavy workload of OKB-1, the production of the Molniya-1 satellite was transferred to Branch No. 2 of OKB-1, nowadays Information Satellite Systems Reshetnev, and all subsequent satellites of the Molniya series were manufactured at this enterprise.
Molniya (Russian for lightning) may refer to: Molniya (satellite), a Soviet military communications satellite Molniya orbit; Molniya (explosive trap), a KGB explosive device; Molniya (rocket), a variation of the Soyuz launch vehicle; OKB-4 Molniya, an experimental design bureau responsible for the Molniya R-60 and Vympel R-73 air-to-air missiles
English: View of the Earth 4 hours after apogee from a Molniya orbit under the assumption that the longitude of the apogee is 90 deg W. The spacecraft is at an altitude of 24043 km over the point 92.65 deg W 47.04 deg N.
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