Citat:
Jag har sett allt material som finns att tillgå från den sk månlandningen och skulle säga att bildkvaliteten stundtals är mycket bättre än när du kör Skype här på jorden 54 år senare.
Jämför övervakningskameror från 80-talet så inser du att filmerna i direktsändning från månen 1969 är fullständigt orealistiska.
Jämför övervakningskameror från 80-talet så inser du att filmerna i direktsändning från månen 1969 är fullständigt orealistiska.
Så du påstår alltså att du satt i kontrollrummet och såg direktutsändningen i SSTV-format under den första månlandningen?
Det var nämligen endast personalen i markstationerna som kunde se utsändningen i visuellt högre kvalitet. Alla andra tittare hade nämligen tv-mottagare som krävde konvertering till andra format (NTSC, PAL) vilket innebar en drastisk försämring av kvaliteten av de filmer som sändes under Apollo 11.
Citat:
The Apollo 11 missing tapes were those that were recorded from Apollo 11's slow-scan television (SSTV) telecast in its raw format on telemetry data tape at the time of the first Moon landing in 1969 and subsequently lost.
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To broadcast the SSTV transmission on standard television, NASA ground receiving stations performed real-time scan conversion to the NTSC television format. The moonwalk's converted video signal was broadcast live around the world on July 21, 1969 (2:56 UTC). At the time, the NTSC broadcast was recorded on many videotapes and kinescope films. Many of these low-quality recordings remain intact. As the real-time broadcast worked and was widely recorded, preservation of the backup video was not deemed a priority in the years immediately following the mission.
The data tapes were used to record all transmitted data (video as well as telemetry) for backup.
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A team of retired NASA employees and contractors tried to find the tapes in the early 2000s but was unable to do so. The search was sparked when several still photographs appeared in the late 1990s that showed the visually superior raw SSTV transmission on ground-station monitors. The research team conducted a multi-year investigation in the hopes of finding the most pristine and detailed video images of the moonwalk. If copies of the original SSTV format tapes were to be found, more modern digital technology could make a higher-quality conversion, yielding better images than those originally seen. The researchers concluded that the tapes containing the raw unprocessed Apollo 11 SSTV signal were erased and reused by NASA in the early 1980s, following standard procedure at the time
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To broadcast the SSTV transmission on standard television, NASA ground receiving stations performed real-time scan conversion to the NTSC television format. The moonwalk's converted video signal was broadcast live around the world on July 21, 1969 (2:56 UTC). At the time, the NTSC broadcast was recorded on many videotapes and kinescope films. Many of these low-quality recordings remain intact. As the real-time broadcast worked and was widely recorded, preservation of the backup video was not deemed a priority in the years immediately following the mission.
The data tapes were used to record all transmitted data (video as well as telemetry) for backup.
---
A team of retired NASA employees and contractors tried to find the tapes in the early 2000s but was unable to do so. The search was sparked when several still photographs appeared in the late 1990s that showed the visually superior raw SSTV transmission on ground-station monitors. The research team conducted a multi-year investigation in the hopes of finding the most pristine and detailed video images of the moonwalk. If copies of the original SSTV format tapes were to be found, more modern digital technology could make a higher-quality conversion, yielding better images than those originally seen. The researchers concluded that the tapes containing the raw unprocessed Apollo 11 SSTV signal were erased and reused by NASA in the early 1980s, following standard procedure at the time
https://en.wikipedia.org/wiki/Apollo_11_missing_tapes
Jag vet inte vad du har för uppfattning om vad bildkvalitet innebär, men det lutar nog åt att du bör besöka Specsavers ganska omgående om du tycker att de filmer som visades när Neil Armstrong satte sin fot på Månens yta har en bättre kvalitet än skype....
https://www.youtube.com/watch?v=J6jplPkbe8g
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Senast redigerad av LaurentiusLucidor 2024-01-04 kl. 17:04.
Senast redigerad av LaurentiusLucidor 2024-01-04 kl. 17:04.
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