High altitude balloon payload, from Sable-3 discussion |
High altitude balloon payload, from Sable-3 discussion |
Sep 26 2007, 11:16 PM
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#101
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
http://www.unmannedspaceflight.com/index.p...20&start=20
We began talkin about a UMSF balloon - and who know what might happen if enough people think about something hard enough, thoroughly enough and long enough. How's about this as a starting point. http://vpizza.org/~jmeehan/balloon/ with http://www.chem.hawaii.edu/uham/part101.html as an important regulatory start point (I'm going to look up the UK regs for this as well) http://www.srcf.ucam.org/~cuspaceflight/nova1launch.html is also very impressive - all done in the UK This http://www.makezine.com/blog/archive/2007/...video_podc.html is particularly impressive - I like the multiple-cameras slant. Anyway - thought I'd get a thread going - this is an idea I like too much to let it gather dust in a corner - the one thing that I think would be nice to achieve is self-portraiture of some sort - think Beagle 2's WAM etc....perhaps in a corner of the FOV of one of/the imaging system. What sort of limit's should we set ourselves? 1kg 10x10x20cm? (sort of 2U Cubesat-on-a-diet budget) Doug |
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Jan 5 2008, 02:49 AM
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#102
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Member Group: Members Posts: 691 Joined: 21-December 07 From: Clatskanie, Oregon Member No.: 3988 |
I have been wanting to build my own balloon, and I have been designing, and coming up with some idea's on what type of science payload I should fly. Upon my research, I found these interesting products that I might use.
0.4 MP OEM camera's, these are not 3 MP but HEY they seem like great cameras anyways . http://www.oemcameras.com/ Maxstream OEM XTend long range radio telemetry modules. http://www.digi.com/products/wireless/long-range-multipoint/ A mini GPS module from Futerlec. http://www.futurlec.com/GPS.shtml |
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Jan 9 2008, 05:10 PM
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#103
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Newbie Group: Members Posts: 3 Joined: 26-December 07 Member No.: 3990 |
I have been wanting to build my own balloon, and I have been designing, and coming up with some idea's on what type of science payload I should fly. Upon my research, I found these interesting products that I might use. A mini GPS module from Futerlec. http://www.futurlec.com/GPS.shtml Also looking into building my own balloon. So very interested in your suggestions. However i think there is a potential problem with the GPS module as the specification says it is limited to 18000m or 60000 feet. As i understand it, this is one of several limitations enforced by the US govt (to prevent non-friendly use). I did read somewhere (sorry can't remember where) that there were several GPS solutions that didn't have this limitation. Perhaps units manufactured outside the states are better? Also found an ebook (well several pdf documents) describing the construction of high altitude balloons that you may not have seen: http://www.parallax.com/Resources/Customer...67/Default.aspx I haven't managed to read it all yet, but it does seem a comprehensive resource. Graham |
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Jan 10 2008, 03:51 PM
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#104
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Senior Member Group: Moderator Posts: 2262 Joined: 9-February 04 From: Melbourne - Oz Member No.: 16 |
However i think there is a potential problem with the GPS module as the specification says it is limited to 18000m or 60000 feet. As i understand it, this is one of several limitations enforced by the US govt (to prevent non-friendly use). I did read somewhere (sorry can't remember where) that there were several GPS solutions that didn't have this limitation. Perhaps units manufactured outside the states are better? I've also been looking into this with regard to the UMSFB project and I believe that the general limit is >18000m AND >515m/s simultaneously, i.e one can be exceeded but not both. Hence there should be no problem with balloon applications. I don't know if some GPS units differ from this or if it's just sloppiness in writing the spec sheets. Can anyone else confirm if this is true, or have regulations got me confused again? James -------------------- |
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Jan 11 2008, 12:25 PM
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#105
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Newbie Group: Members Posts: 3 Joined: 26-December 07 Member No.: 3990 |
I've also been looking into this with regard to the UMSFB project and I believe that the general limit is >18000m AND >515m/s simultaneously, i.e one can be exceeded but not both. Hence there should be no problem with balloon applications. I don't know if some GPS units differ from this or if it's just sloppiness in writing the spec sheets. Can anyone else confirm if this is true, or have regulations got me confused again? James I think you may be right about the regs, however i am guessing that for simplicity of implementation it seems as if some manufacturers may just choose to implement the altitude part of the regs and ignore the others. I guess for most applications 60,000' limit is not a problem. I have now found the list of GPS's that apparently do work above 60,000': http://showcase.netins.net/web/wallio/GPSrcvrsvs60kft.htm I would be interested to know if anyone knows anymore about this. Graham ps what is the UMSFB project? I tried google but to no avail. |
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Jan 11 2008, 12:29 PM
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#106
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Founder Group: Chairman Posts: 14433 Joined: 8-February 04 Member No.: 1 |
ps what is the UMSFB project? This thread, basically. I've been totally sidetracked from it - I'd love to see it happen, but I no longer have any time to spend on it, I've got a very interesting project that's come up and I'm focussing on that a lot. If anyone in Europe wants to take this on - I'd be happy to bundle up all the kit assembled so far and send it over to you. Doug |
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Jan 11 2008, 12:41 PM
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#107
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Newbie Group: Members Posts: 3 Joined: 26-December 07 Member No.: 3990 |
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