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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Founder Group: Chairman Posts: 14448 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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Sep 28 2007, 12:10 AM
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Merciless Robot Group: Admin Posts: 8789 Joined: 8-December 05 From: Los Angeles Member No.: 602 |
Well, here's something for that; not cheap, though (US$700). It calls a cell phone with position, and can be set for time-based or event based (jars, impact) reporting. 2.5 m accuracy isn't bad, but may be overstated for straight civilian GPS; would love to find a DGPS for more precision. Battery-powered, so no additional load on the vehicle bus.
I'll look around some more. -------------------- A few will take this knowledge and use this power of a dream realized as a force for change, an impetus for further discovery to make less ancient dreams real.
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Sep 28 2007, 08:14 AM
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Dublin Correspondent Group: Admin Posts: 1799 Joined: 28-March 05 From: Celbridge, Ireland Member No.: 220 |
Well, here's something for that; not cheap, though (US$700). It calls a cell phone with position, and can be set for time-based or event based (jars, impact) reporting. 2.5 m accuracy isn't bad, but may be overstated for straight civilian GPS; would love to find a DGPS for more precision. Battery-powered, so no additional load on the vehicle bus. I'll look around some more. The MicroTrak looks like an ideal solution and as Dan says it has the significant advantage of being proven for the purpose and the whole thing is cheap (~$100) and weighs less than a couple of ounces. Receivers for a tracking team (or teams) seem to be dirt cheap - this site has the RF part for less than 20 euros and it looks as if linking this into a PC\laptop is also cheap and straightforward if we wanted to do that. If we were happy to use a cellular phone type device for tracking then I can build a solution using any Windows Mobile\Pocket PC Phone Edition device with an internal GPS ( I have one of these that's got a broken power connection that I'm happy to donate to the cause if I can fix it ) that is certainly good for <5m accuracy which is more than good enough. It will probably need additional power to keep its GPS and cellular radios running for the sort of time we're talking about. I don't think it would be able to give anything like live telemetry at any serious altitude (a couple of thousand m) but it's no problem to get it to log to an SD card and send what it can over GPRS when its available so it might not be a bad approach. Total mass without the battery is about 190g. It's even got a very lousy cell phone camera that we could use to get some additional pictures as a backup. |
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