Regarding your specific question about the field sequential
recordings. I received the following from a Nasa employee
while investigating other archived materials that shall remain
nameless.
First let me say that Slow-Scan TV was only used on Apollo 7, 8, 9 and
11. Apollo 10 and all subsequent missions through Skylab and
Apollo-Soyuz used the Westinghouse Field Sequential Color cameras that
operated at NTSC rates (525 lines, 30 frames per second). The Apollo
12 and 14 Lunar Module used a modified Westinghouse field sequential
color camera.
The quality of the television signal was degraded due to the need to
filter out the LM voice and telemetry subcarriers.
The Apollo 15, 16 and 17 lunar landing missions used the RCA GTCA
cameras that used the same field sequential color standard used by the
Westinghouse CSM color cameras. The quality was near broadcast
standards due to the use of a special device that removed the LM and
lunar rover subcarriers without degrading the television signal. The
television signals on the Apollo 16 and 17 lunar landing missions was
further improved by special processing by Image Transform. The NASA
Johnson Spaceflight Center still has a video archive that has digital
copies of the original field sequential color broadcasts by the
Apollo, Skylab, and Shuttle missions over the years. Mark Gray of
Spacecraft Films has produced an extensive DVD library of that
contains all of the Apollo field sequential color broadcasts.
I hope that answers your question. The reasons the networks don't
use these? Laziness. Even Nasa tv doesn't show the cleaned up
recordings on Sundays or anniversaries which is unforgivable I think.
The following, Actual studio recorded conversation at Nasa TV control
room, "Hey Bob, yeah pull out the analog Beta Sp master from 1983 and
run it, yeah who cares...What? Run the new brilliant restored digital
transfer with eye popping sound and color of the Apollo 15 Eva? No
thanks Bob. That's just to much work to impress my grand kids."
On Tue, 10 Jun 2008 21:22:55 -0400, Jud McCranie
youknowwhat.mccra... at (no spam) comcast.net> wrote:
On Tue, 10 Jun 2008 15:27:28 -0400, Jud McCranie
youknowwhat.mccra... at (no spam) comcast.net> wrote:
The Apollo 11 Slow-scan TV and the conversion is pretty well known.
What about the TV on the later Apollo landings?
Thishttp://www.hq.nasa.gov/alsj/ApolloTV-Acrobat7.pdfhas a lot of
information.- Hide quoted text -
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