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Post by LunarOrbit on Dec 15, 2007 23:39:22 GMT -4
No problem.
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Post by Ginnie on Dec 22, 2007 21:12:15 GMT -4
But that's an essential problem because the text has to appear variously on light and dark backgrounds. Yep, I remember that being a difficult thing to work out. We ended up going with the orange because it did the best job of satisfying both requirements simultaneously, even though it wasn't best at either one individually. here what your site could look like:
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Post by ka9q on Mar 9, 2008 7:15:18 GMT -4
The Passive Thermal Control (BBQ roll) during cruise was actually about 3 RPM. You can see that Apollo 11 was in the BBQ roll as the earth slowly moved across the windows during the video. If these earth images were supposedly faked with a cutout or a transparency, then why would NASA make things unnecessarily hard on themselves by also having to fake the BBQ roll??
Note the conversation with the ground about TV coverage on the omni antenna. Apollo 11 was still just close enough to earth to transmit TV through an omnidirectional antenna, meaning they didn't have to stop the roll to use the high gain antenna. They did have to switch between the omni antennas on opposite sides of the spacecraft as it rolled, and you can hear them talk about this.
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Post by Obviousman on Mar 12, 2008 13:58:38 GMT -4
I'd question that. IIRC the PTC rate was about 12 degrees per minute (though I may be wrong).
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Bob B.
Bob the Excel Guru?
Posts: 3,072
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Post by Bob B. on Mar 12, 2008 14:50:51 GMT -4
I don't remember what the rate was, but my recollection is that it was way slower than 3 RPM.
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Post by PhantomWolf on Mar 12, 2008 15:21:02 GMT -4
I did think he might have typoed meaning 3 RPH, but if it was 12° per minute that'd only be 2 RPH.
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Post by echnaton on Mar 12, 2008 19:05:11 GMT -4
One example from the Apollo 15 is provided in the Lunar Flight Journal013:37:48 Henize: 15, this is Houston. On your PTC, when it started out, it looked okay; but we find that it's diverging now, and we're going to have to reinitialize it. We suggest this time around that we use a - a rate of .375 [degrees per second] in Noun 79, that might help. If my math is correct, .375 DPS is 22.5 degrees per minute making one revolution in 16 minutes, or 3.75 RPH
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Post by ka9q on May 1, 2008 6:35:17 GMT -4
I did think he might have typoed meaning 3 RPH, but if it was 12° per minute that'd only be 2 RPH. Yes, indeed I mistyped RPM when I meant revolutions per *hour*. Sorry about that, but at least my meaning was reasonably clear.
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Post by ka9q on Jul 29, 2008 4:43:41 GMT -4
There's another line of argument that the Apollo 11 pictures of earth could not have been taken from low earth orbit.
The video lasts way too long. TDRSS didn't come until a decade after Apollo. So ground stations were used, and in low earth orbit the maximum pass was something like 10 minutes. Maybe even less since the Apollo parking orbits were ultra-low to maximize performance to the moon. Even with tracking ships and airplanes to fill in the more critical regions (like TLI), only a fraction of the parking orbits were covered by any kind of tracking station, and only a few of them could handle video. So how can the Apollo 11 video possibly last so long?
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Post by fiveonit on Sept 17, 2008 5:37:50 GMT -4
Sorry guys... but the Hoax Pushers are already HARD at work disproving NASA (and us) again. God... how will I sleep tonight!! The new *THEORY* now is that our old buddy Bart was actually wrong!! Here's an excerpt from a CT that I'm arguing with on youTube... I'm not sure what this guys is seeing, but it's nice to know they're starting to admit that Bart doesn't know what he's talking about!! If they're spending all their time coming up with this crap, it makes me wonder how they find time to eat and sleep and go to school. Wait... They don't go to school. At least not science class.
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Post by JayUtah on Sept 17, 2008 10:44:36 GMT -4
Actually Sibrel embraced the "transparency" theory not long after his first film was torn to shreds by people who pointed out that his "matted view of Earth from orbit" theory flew in the face of orbital mechanics.
Of course the YouTube conspiracy theorists still haven't wrapped their minds around the fact that most of their "not for public vieweing" footage is, in fact, the live telecast that was very much for public viewing. But that's only the tip of the iceberg of what's wrong with their claims.
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Post by Ginnie on Sept 17, 2008 15:29:44 GMT -4
Sorry guys... but the Hoax Pushers are already HARD at work disproving NASA (and us) again. God... how will I sleep tonight!! The new *THEORY* now is that our old buddy Bart was actually wrong!! Here's an excerpt from a CT that I'm arguing with on youTube... I'm not sure what this guys is seeing, but it's nice to know they're starting to admit that Bart doesn't know what he's talking about!! If they're spending all their time coming up with this crap, it makes me wonder how they find time to eat and sleep and go to school. Wait... They don't go to school. At least not science class. I don't think satellites took pictures of earth from that far out at the time.
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Post by JayUtah on Sept 17, 2008 16:21:02 GMT -4
Weather satellites in the 1960s were generally in low polar orbits. They took pictures in swaths a thousand miles or so across, usually in monochrome infrared, that had to be sewn together to form any sort of horizontal extent.
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Post by Ginnie on Sept 17, 2008 17:04:06 GMT -4
Weather satellites in the 1960s were generally in low polar orbits. They took pictures in swaths a thousand miles or so across, usually in monochrome infrared, that had to be sewn together to form any sort of horizontal extent. That's what I thought, but I was too lazy to do the research... ;D
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Post by fiveonit on Sept 17, 2008 20:38:10 GMT -4
Weather satellites in the 1960s were generally in low polar orbits. They took pictures in swaths a thousand miles or so across, usually in monochrome infrared, that had to be sewn together to form any sort of horizontal extent. I figured as much as well, but I am also too lazy to do the research! Why should I? If I present this info to him, he'll just say.. "I never said Weather Satellite! It was a secret satellite put into orbit by NASA to fool us!!" .. or some other mumbo jumbo. ... YAWN ...
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