PDA

View Full Version : Video of the first lunar landing?



pi is exactly 3
2003-Nov-22, 01:58 AM
It may seem kind of a stupid question but how did they video tape the first walk on the moon? Was there a camera attached to the outside of the lander? if so, how did it manage the decent to the moon's surface without getting damaged?

jscotti
2003-Nov-22, 03:02 AM
It may seem kind of a stupid question but how did they video tape the first walk on the moon? Was there a camera attached to the outside of the lander? if so, how did it manage the decent to the moon's surface without getting damaged?

The landing itself was filmed with a 16mm DAC film movie camera mounted in the right hand window, pointed downward. That film was not developed until after the crew and spacecraft returned to Earth. The same camera was set up in the same window at a much lower frame rate (one frame per second?) to show the lunar surface near the LM during the EVA.

The moonwalk itself was filmed with a TV camera whose images were broadcast back to Earth in near real-time. It was able to show both astronauts descending the ladder since it was mounted on the MESA (Mudular Equipment Stowage Assembly) which was a table-like shelf attached to the side of the LM that was hinged at the bottom and was unfolded when Armstrong pulled a D-ring attached to a cable that released the MESA. The camera was mounted there so that it aimed back at the ladder to show them climbing down it. Later, the camera was removed from the MESA, fitted with a narrower angle lens and mounted on a tripod some distance from the LM so those of us stuck back on Earth could watch them walk around and do their work at Tranquility Base.

Jim.

Glom
2003-Nov-22, 03:08 AM
To the side of the Z+ strut, the landing strut with the ladder, was an equipment bay on the side of the descent stage called the Modular Equipment Stowage Assembly (MESA). This contained all sorts of goodies like PLSS batteries, LiOH cartridges, sample bags a bit of film and the television camera. The MESA was essentially a shelf with all the goodies that was raised up, drawbright style, into the side of the descent stage. It was designed so that Armstrong could release the MESA and allow the shelf to fall into position from the porch. When this happened, the television camera, which was on a kind of spring assembly, popped up into position. Then they just closed the TV circuit breaker and they had a picture on the TV.

AS15-88-11864 (http://www.lpi.usra.edu/research/apollo/images/AS15/88/11864.jpg) shows the MESA drawbridge on the Apollo 15 LM Endeavour.

Glom
2003-Nov-22, 03:09 AM
There's always someone who gets there first!