TV from the Moon
While NASA is recreating the entire Apollo 11 mission to the moon via a web portal, there is other information surfacing that, not only has NASA recovered the original downlink videotapes from the mission (instead of the blurry kinescopes of the actual first step on the moon) there’s also information on the web that describes, in laborious and scientific minutiae the details that enabled the live television broadcast from the moon itself.
What format did the camera use, how was it converted for broadcast, what antennas were used and a whole lot more. Great reading for those gearheads out there.
Here’s the Parkes Observatory, Austrailia, account of their support for the NASA Apollo 11 mission.
The lunar television camera was a black-and-white, slow-scan TV (SSTV) with a scan rate of 10 frames-per-second at 320 lines-per-frame. It weighed 3.29 kg (7.25 lb) and drew 6.5 watts of 24-32 volts of DC power. The camera body was 26.9 cm long, 16.5 cm wide and 8.6 cm deep (10.6 x 6.5 x 3.4 inches). The bayonet lens mount permitted lens changes by a crewman in a pressurised suit. Two lenses were provided: a wide-angle lens for close-ups and large areas, and a lunar day lens for viewing lunar surface features and activities in the near field of view with sunlight illumination.
And the New NASA Apollo 11 site:
And just for giggles (because it’s so far fetched to me) there are three twitter feeds:
- Apollo 11 to Houston = AP11_Spacecraft
- Houston to Apollo 11= AP11_Capcom
- Eagle to Houston & Columbia = AP11_Eagle