Lunar Module Descent Monitoring Chart


Senator John Heinz History Center

Senator John Heinz History Center
Pittsburgh, PA, United States

Using fairly basic technology and with almost no computer support, Valentine and others in his group took the scanned images gathered by the lunar orbiters and began developing maps. Valentine stayed for six years, providing data for the Apollo program from its beginning up to Apollo 17. The data his group generated proved useful for targeting three potential landing sites for the Apollo 11 astronauts. In the end however a computer glitch onboard the Lunar Module meant that astronaut Neil Armstrong had to take the lander off autopilot and pilot it to a new site.


  • Title: Lunar Module Descent Monitoring Chart
  • Date Created: 1960s
  • Type: Document
  • Collection Information: Courtesy of Alex Valentine

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