Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009

posted 11-03-2019 02:16 PM               

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I would have liked to know if one could send directly updates to the Apollo Guidance Computer during the lunar voyage?

Where did this information come from Houston: by radio orally (later entered manually entered by astronauts with the DSKY), or by radio teletype, or directly in the RAM memory of the AGC?

Big question I ask myself. Thank in advance.

Posts: 15
From: Germany
Registered: Feb 2016

posted 11-04-2019 07:22 AM            

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Yes, the AGC was updated many times during a mission via uplink from the various tracking stations around the world, initiated by mission control. The most common update was the state vector, the computer's knowledge of the spacecraft position and velocity.

The format of these uplinks was actually DSKY keystrokes. So you can imagine an uplink as if mission control itself was using the DSKY to enter data into the computer. That also meant, if the uplink wasn't working, the data to be entered into the AGC could also be entered on the DSKY by the astronauts themselves.

Posts: 1463
From: Cape Canaveral, FL
Registered: Mar 2010

Posts: 148
From: Ledignan, Gard (30), France
Registered: Mar 2009