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Because the resulting orbital apogee was ~572 km instead of the planned ~350 km for the nominal circular orbit, several times each day OSO 7 passed fairly deeply into the Van Allen radiation belts, so that bombardment by high energy protons made it somewhat radioactive. The activity then decayed slowly during other times of the day.
Dr. Nancy Roman with a model of OSO 1 (1962) OSO 1 diagram OSO 4 (1967). The Orbiting Solar Observatory (abbreviated OSO) Program was the name of a series of American space telescopes primarily intended to study the Sun, though they also included important non-solar experiments.
OSO 7 / TTS-4: Solar observation satellite / Technology demonstration LEO, 321×572 km, 93.2 min, i=33.1°, e=0.0184 Success 2nd stage suffered a failure of the attitude control system, however the satellite reached orbit and ground controllers were able to correct its flight path. [10] 74 1971-10-21 11:32 Delta N6: Delta 86 Thor 572 VAFB SLC ...
Orbital Piloted Assembly and Experiment Complex; Orbital Reflector; Orbiting Geophysical Observatory; Orbiting Picosat Automatic Launcher; Orbiting Solar Observatory; Orbiting Vehicle; OSCAR 1; OSCAR 2; OSCAR 3; OSCAR 4; OSCAR 40; OSCAR 44; OSO 7
P78-1 or Solwind was a United States satellite launched aboard an Atlas F rocket from Vandenberg Air Force Base in California on February 24, 1979. [1] The satellite's mission was extended by several weeks, so that it operated until it was destroyed in orbit on September 13, 1985, to test the ASM-135 ASAT anti-satellite missile.
Pioneer 6, 7, 8, and 9 were space probes in the Pioneer program, launched between 1965 and 1969. They were a series of solar-orbiting, spin-stabilized, solar cell- and battery-powered satellites designed to obtain measurements on a continuing basis of interplanetary phenomena from widely separated points in space. [ 5 ]
The NASA observatory was launched on 12 December 1970 into an initial orbit of about 560 km apogee, 520 km perigee, 3 degrees inclination, with a period of 96 minutes. The mission ended in March 1973. Uhuru was a scanning mission, with a spin period of ~12 minutes.
The detailed images recorded by SDO in 2011–2012 have helped scientists uncover new secrets about the Sun. The Solar Dynamics Observatory (SDO) is a NASA mission which has been observing the Sun since 2010. [4]