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The three Space Shuttle main engines (SSMEs) were ignited roughly 6.6 seconds before liftoff, and computers monitored their performance as they increased thrust. If an anomaly was detected, the engines would be shut down automatically and the countdown terminated before ignition of the solid rocket boosters (SRBs) at T = 0 seconds.
The Space Shuttle program was the fourth human spaceflight program carried out by the U.S. National Aeronautics and Space Administration (NASA), which accomplished routine transportation for Earth-to-orbit crew and cargo from 1981 to 2011.
STS-51-F (also known as Spacelab 2) was the 19th flight of NASA's Space Shuttle program and the eighth flight of Space Shuttle Challenger.It launched from Kennedy Space Center, Florida, on July 29, 1985, and landed eight days later on August 6, 1985.
The Space Shuttle used two variants of the AP-101: the earlier AP-101B and the upgraded AP-101S. The AP-101B was used for a series of Approach and Landing Tests in 1977. The first ascent to orbit was in 1981. The AP-101S first launched in 2000. Logic board from an IBM AP-101S Space Shuttle General Purpose Computer.
The three key principles in designing the language were reliability, efficiency, and machine-independence.The language is designed to allow aerospace-related tasks (such as vector/matrix arithmetic) to be accomplished in a way that is easily understandable by people who have spaceflight knowledge, but may not necessarily have proficiency with computer programming.
During the design of the Space Shuttle, the Phase B proposals were not as cheap as the initial Phase A estimates indicated; Space Shuttle program manager Robert Thompson acknowledged that reducing cost-per-pound was not the primary objective of the further design phases, as other technical requirements could not be met with the reduced costs. [24]:
The Orion spacecraft, which was developed to follow the Space Shuttle program, uses a Mercury and Apollo-style escape rocket system, while an alternative system, called the Max Launch Abort System (MLAS), [4] was investigated and would have used existing solid-rocket motors integrated into the bullet-shaped protective launch shroud.
A low Earth orbital infrastructure program; Discontinuing human space activities; Based on the advice of the Space Council, President Nixon made the decision to pursue the low Earth orbital infrastructure option. This program mainly consisted of the construction of a space station, along with the development of a Space Shuttle. Funding ...