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#21
February 1st 04, 04:57 PM
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On 29 Jan 2004 01:50:40 -0800, (Peterson, David) wrote: They are averaging about 2 Odyssey UHF passes and 1 Mars Global Surveyor UHF pass per day. Each pass they are getting about 8 Mbytes of data. They are also getting about 4 Mbytes from direct to earth X-band communication. This gives a total of about 28 Mbytes per day. The high resolution picture above is 0.6 MB. The Spirit Panorama is made with 225 images (to get 3 color and 360 degrees). If all those images were 0.6 MB, that's 135 MB It would take 5 days to send that much data... Seems right, but they released a graph showing the daily data volume returned by Spirit. which has exceeded 200MB/day. See: http://tinyurl.com/338d9 Not sure of the explanation of how they can do that. Joe 
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#22
February 1st 04, 05:12 PM
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In article om,
Joe Knapp wrote: On 29 Jan 2004 01:50:40 -0800, (Peterson, David) wrote: They are averaging about 2 Odyssey UHF passes and 1 Mars Global Surveyor UHF pass per day. Each pass they are getting about 8 Mbytes of data. They are also getting about 4 Mbytes from direct to earth X-band communication. This gives a total of about 28 Mbytes per day. The high resolution picture above is 0.6 MB. The Spirit Panorama is made with 225 images (to get 3 color and 360 degrees). If all those images were 0.6 MB, that's 135 MB It would take 5 days to send that much data... Seems right, but they released a graph showing the daily data volume returned by Spirit. which has exceeded 200MB/day. See: http://tinyurl.com/338d9 Not sure of the explanation of how they can do that. The label on the Y axis looks a bit more like "Mbits" to me that "MB" or "Mbytes". It might have been more readable had they used PNG/GIF.
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#23
February 1st 04, 05:13 PM
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"Kenneth Chiu" wrote Seems right, but they released a graph showing the daily data volume returned by Spirit. which has exceeded 200MB/day. See: http://tinyurl.com/338d9 Not sure of the explanation of how they can do that. The label on the Y axis looks a bit more like "Mbits" to me that "MB" or "Mbytes". It might have been more readable had they used PNG/GIF. Ah, you're right. Joe
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#24
February 1st 04, 05:14 PM
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Joe Knapp wrote:
Seems right, but they released a graph showing the daily data volume returned by Spirit. which has exceeded 200MB/day. See: http://tinyurl.com/338d9 That really shows how important Odyssey is in getting the data back to earth. It's so much nicer to build a rover to send data to an orbiting spacecraft rather than directly home. I know that NASA wants to send an orbiting communications satellite to facilitate future missions, but there have been critics. Perhaps the MER success will help bolster the idea. Why does Odyssey send more data some days than others? It has to do with the geometry of the passes. If the satellite passes directly overhead they get a longer window to send data and more can be sent. -- Greg Crinklaw Astronomical Software Developer Cloudcroft, New Mexico, USA (33N, 106W, 2700m) SkyTools Software for the Observer: http://www.skyhound.com/cs.html Skyhound Observing Pages: http://www.skyhound.com/sh/skyhound.html To reply remove spleen
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#25
February 1st 04, 05:14 PM
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"Joe Knapp" wrote: Seems right, but they released a graph showing the daily data volume returned by Spirit. which has exceeded 200MB/day. See: http://tinyurl.com/338d9 Not sure of the explanation of how they can do that. That graph shows megabits, as in 200 Mb or 25 MB.
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#26
February 1st 04, 05:16 PM
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Kenneth Chiu wrote:
The label on the Y axis looks a bit more like "Mbits" to me that "MB" or "Mbytes". It might have been more readable had they used PNG/GIF. Yes, the culture is to report data in megabits rather than megabytes (a factor of eight). -- Greg Crinklaw Astronomical Software Developer Cloudcroft, New Mexico, USA (33N, 106W, 2700m) SkyTools Software for the Observer: http://www.skyhound.com/cs.html Skyhound Observing Pages: http://www.skyhound.com/sh/skyhound.html To reply remove spleen
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#27
February 1st 04, 06:35 PM
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Answering by insulting and trying to make a fool of others you don't agree
with surely doesn't show any sign of superior intelligence to understand science... I didn't insult anyone but I get insulted by people like you, this just shows your childish and uneducated behaviour. I believe you are insulting the hundreds of scientists and engineers working on the MER project by questioning their integrity and dedication to science. You are basically saying some of them are liars with no proof at all.
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#28
February 1st 04, 06:58 PM
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And as one of those engineers from JPL, I will say it again, knowing that
the conspiracy people will never listen, that there are about 5,000 people working at JPL alone, and may more working for NASA, the majority of who are blabbermouths who are definitely not being paid enough to keep quiet about anything, who will gladly call the local paper for free to spill the beans if anything really significant were found on any mission. What the conspiracy theorists don't seem to care to comment on is why JPL is having the biggest brain drain of highly qualified and experienced engineers and technicians in the past two years. Even a lot of the MER engineering team is out of work. Why ? But they're more concerned with imaginary people on Mars or aliens riding a comet than real, experienced, and talented people being laid off and the US possibly losing its expertise in interplanetary spacecraft building. "Peterson, David" wrote in message om... Answering by insulting and trying to make a fool of others you don't agree with surely doesn't show any sign of superior intelligence to understand science... I didn't insult anyone but I get insulted by people like you, this just shows your childish and uneducated behaviour. I believe you are insulting the hundreds of scientists and engineers working on the MER project by questioning their integrity and dedication to science. You are basically saying some of them are liars with no proof at all.
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#29
February 1st 04, 07:16 PM
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In article ,
David Nakamoto wrote: ...JPL is having the biggest brain drain of highly qualified and experienced engineers and technicians in the past two years. Even a lot of the MER engineering team is out of work. Why? Yikes! So why? Budget cuts? Morale? What percentage are contractors?
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