PPRuNe Forums - View Single Post - Difference between IRS and INS
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Old 23rd Aug 2001, 10:09
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The INS system was developed for the Apollo program by MIT. On 09 August 1961 the first Apollo development contract Program was awarded. NASA selected MIT's Instrumentation Laboratory to develop the guidance-navigation system for Project Apollo spacecraft. This first major Apollo contract was required since guidance-navigation system is basic to overall Apollo mission. The Instrumentation Laboratory of MIT, a nonprofit organization headed by C. Stark Draper, has been involved in a variety of guidance and navigation systems developments for 20 years. This first major Apollo contract had a long lead-time, was basic to the overall Apollo mission, and would be directed by STG.

All primary Apollo 7 mission objectives were met, as well as every detailed test objective (and three test objectives not originally planned). Engineering firsts from Apollo 7, aside from live television from space, included drinking water for the crew produced as a by-product of the fuel cells. Piloting and navigation accomplishments included an optical rendezvous, daylight platform realignment, and orbital determination via sextant tracking of another vehicle. All spacecraft systems performed satisfactorily. Minor anomalies were countered by backup systems or changes in procedures. With successful completion of the Apollo 7 mission, which proved out the design of the Block II Crew Service Module (CSM 101), NASA and the nation had taken the first step on the pathway to the moon.

Apollo 10 . During the return trip the astronauts made star-lunar landmark sightings and star-earth horizon navigation sightings.

All cut & paste from this site.
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