文档介绍：The Search for the Apollo 11 SSTV Tapes
John M. Sarkissian
Operations Scientist
CSIRO Parkes Observatory
21 May 2006
Contact Details:
John.******@
Tel: +61 2 68611700
Fax: +61 2 68611730
CSIRO Parkes Observatory
PO Box 276
Parkes. NSW. 2870.
Australia.
1
Executive Summary
For the past several years a group of dedicated former Apollo 11 personnel have been searching for
the original ic data tapes that contain the high quality Slow-Scan TV of the Apollo 11 EVA.
This report is a detailed justification of their efforts to date. In summary, the key points are:
• In July 1969, three tracking stations received the TV signals of the historic Apollo 11 EVA.
They were the DSN 64 metre antenna at Goldstone, California, the MSFN 26 metre antenna
at Honeysuckle Creek, Australia, and the 64 metre CSIRO Parkes Radio Telescope in
Australia.
• The TV signals transmitted from the Moon were high quality Slow-Scan TV (SSTV).
• When received on Earth, they were scan-converted to mercial TV standards before
being broadcast to the public at large.
• The scan-converted TV signals, from each of the three stations, were then relayed via
landline, microwave relays and geostationary satellite to Houston before being released to
the works for general broadcast.
• The signal, as sent from the Moon, was initially degraded by the scan-conversion process,
producing lower resolution images and introducing additional signal noise. Also, the
transmission of the scan-converted TV to Houston caused additional signal degradation.
This lower quality TV is currently all that is available of the Apollo 11 EVA.
• The SSTV was of superior quality to the scan-converted pictures viewed by the world.
• As the raw SSTV signals were received at the three tracking stations, they were recorded
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