Mission
The mission was designed to be boosted towards the Moon by an Atlas/Agena, undergo one mid-course correction, and impact the lunar surface. At the appropriate altitude the capsule was to separate and the retrorockets ignite to cushion the landing. Due to an apparent failure of a timer in the spacecraft's central computer and sequencer following launch the command signals for the extension of the solar panels and the operation of the sun and earth acquisition system were never given. The instrumentation ceased operation after about 10 hours of flight. The spacecraft was tracked by the battery-powered 50 milliwatt transmitter in the lunar landing capsule. Ranger 4 impacted the far side of the Moon (229.3 degrees E, 15.5 degrees S) at 9600 km/hr at 12:49:53 UT on April 26, 1962 after 64 hours of flight.
This spacecraft, similar in design to Ranger 3, was the first U.S. spacecraft to reach another celestial body. Although the spacecraft did not achieve its primary objective, the Atlas-Agena-Ranger combination performed without fault for the first time.
Read more about this topic: Ranger 4
Famous quotes containing the word mission:
“The mission of the United States is one of benevolent assimilation.”
—William McKinley (1843–1901)
“When you’re dealing with monkeys, you’ve got to expect some wrenches.”
—Alvah Bessie, Ranald MacDougall, and Lester Cole. Raoul Walsh. Captain Nelson, Objective Burma, giving a subaltern a mission (1945)
“... [a] girl one day flared out and told the principal “the only mission opening before a girl in his school was to marry one of those candidates [for the ministry].” He said he didn’t know but it was. And when at last that same girl announced her desire and intention to go to college it was received with about the same incredulity and dismay as if a brass button on one of those candidate’s coats had propounded a new method for squaring the circle or trisecting the arc.”
—Anna Julia Cooper (1859–1964)