A Dictionary of Space Exploration by Stephen O'Meara & E. Julius Dasch

Author:Stephen O'Meara & E. Julius Dasch
Language: eng
Format: epub
ISBN: 9780192526595
Publisher: OUP Oxford
Published: 2018-06-20T16:00:00+00:00

launch The act of propelling a space vehicle through the atmosphere and into space. This normally involves rockets, a satellite or space probe, and the payloads on board the spacecraft. Although a launch begins with lift-off, months are spent on pre-launch activities.

https://www.globalsecurity.org/space/index.html

Part of the World Space Guide, this site includes statistics and a history of the USA's launch systems. Each spacecraft description is accompanied by a simple diagram or photograph.

launch and early orbit phase (LEOP) A designation used by the European Space Agency for the launch and first few orbital revolutions of a spacecraft. The launch phase begins 10 hours before launch and ends 18 minutes and 25 seconds after lift-off as the satellite separates from its launch vehicle. Before a satellite goes into orbit, its on-board computer initiates an acquisition sequence of automatic operations, pointing the payload instruments to the Earth and otherwise preparing the spacecraft for orbit. The early orbit phase during the first few hours comprises operations on board and at ground stations to make the spacecraft fully operational.

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