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High altitude balloon payload, from Sable-3 discussion
djellison
post Sep 26 2007, 11:16 PM
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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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jamescanvin
post Oct 19 2007, 10:11 AM
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Good show Doug.

Parafoils - Genius!

Coming back to the camera pointing issue that you talked about. With two cameras, I'm as torn as you are about having one landscape and one portrait vs both in portrait. I don't think there is a lot in it, and determining which is best is probably rather dependent on how much the gondola is swinging. At the moment I think I'm inclined to go with the 'double portrait' mode to, as you say, maximize the coverage from horizon to nadir. A slight clarification from what you said, you probably don't want to mount them to get from horizon to nadir in one shot, we really want to be getting the horizon in as much as possible. So the first should probably be mounted so that the image centre is pointed somewhat at the horizon (maybe a little below). Hence the bottom edge of the lower camera will be at 60-65 degrees, hopefully low enough so that with a few fortuitous swings we get some direct nadir imaging.

If you can do the tests on the field of view and get an idea of what frame rate we can manage (power, memory), I'll examine some images from other projects to try to get some better statistics on the expected gondola motion and then I'll run some more simulations.


Oh, and about mixing units - I now know who I'll be blaming when we loose it on EDL! rolleyes.gif

James


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ustrax
post Oct 19 2007, 10:33 AM
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Man...you need an haircut... tongue.gif


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Posts in this topic
- djellison   High altitude balloon payload   Sep 26 2007, 11:16 PM
- - djellison   Tonight I'll try and do a little vodcast thing...   Oct 12 2007, 07:14 AM
- - AndyG   Can't beat a few Ents at the end of the garden...   Oct 12 2007, 12:38 PM
- - djellison   Well - the course remains once you're stopped ...   Oct 12 2007, 12:42 PM
|- - marsbug   The only contribution I've got to make to this...   Oct 12 2007, 12:51 PM
- - nprev   Yes...Ad astra per scientiam, Doug! ...and ple...   Oct 12 2007, 01:55 PM
- - djellison   Some more bits and pieces have arrived - but there...   Oct 14 2007, 11:32 PM
- - elakdawalla   Time to start a naming contest yet? To make thin...   Oct 14 2007, 11:41 PM
|- - jamescanvin   QUOTE (elakdawalla @ Oct 15 2007, 12:41 A...   Oct 15 2007, 11:09 AM
- - lyford   elakdawalla will doug let us really do haiku named...   Oct 15 2007, 04:27 AM
- - djellison   Just popped home - the mirrors have arrived - that...   Oct 15 2007, 01:03 PM
|- - ngunn   QUOTE (djellison @ Oct 15 2007, 02:03 PM)...   Oct 15 2007, 08:06 PM
- - djellison   PICAXE AHOY Got a few relays, and a buzzer, and ...   Oct 15 2007, 05:23 PM
- - djellison   IT WORKS I did a simple CODEmain: high 0 ...   Oct 15 2007, 07:43 PM
- - djellison   Mr & Mrs Latex.   Oct 15 2007, 09:26 PM
- - ElkGroveDan   I'm hoping that somewhere obvious on it will b...   Oct 15 2007, 09:39 PM
- - djellison   One of the payloads that they let aloft from Cambr...   Oct 15 2007, 09:58 PM
- - ElkGroveDan   Better include Bjorn's contact info, just in c...   Oct 15 2007, 10:03 PM
- - djellison   Just contacted the CAA ( UK's version of the F...   Oct 15 2007, 10:24 PM
- - djellison   Video Update 1 - Envelope, Parachute, Gondola ht...   Oct 19 2007, 07:39 AM
- - mchan   Good show! All you need is a whiteboard that ...   Oct 19 2007, 08:21 AM
- - AndyG   A short piece in the Guardian newspaper this week ...   Oct 19 2007, 09:34 AM
- - jamescanvin   Good show Doug. Parafoils - Genius! Coming ...   Oct 19 2007, 10:11 AM
|- - ustrax   Man...you need an haircut...   Oct 19 2007, 10:33 AM
|- - AndyG   QUOTE (jamescanvin @ Oct 19 2007, 11:11 A...   Oct 19 2007, 01:14 PM
|- - djellison   QUOTE (jamescanvin @ Oct 19 2007, 11:11 A...   Oct 19 2007, 01:51 PM
|- - AndyG   I thought the parafoil's quote came from James...   Oct 19 2007, 02:06 PM
- - djellison   You need a shave   Oct 19 2007, 11:28 AM
|- - ustrax   QUOTE (djellison @ Oct 19 2007, 12:28 PM)...   Oct 19 2007, 11:54 AM
- - ugordan   Hahahah... buuuuurn!   Oct 19 2007, 11:52 AM
- - jamescanvin   Actually my comment did come from Doug talking abo...   Oct 19 2007, 02:34 PM
- - djellison   Gizmo may well be involved in the final part of th...   Oct 19 2007, 04:11 PM
- - lyford   I am assuming that since this is UMSF we don't...   Oct 19 2007, 06:19 PM
- - djellison   Part the Third http://uk.youtube.com/watch?v=U0IJM...   Oct 19 2007, 11:00 PM
- - ElkGroveDan   Does the data from the GPS device include ALTITUDE...   Oct 20 2007, 01:56 AM
|- - djellison   QUOTE (ElkGroveDan @ Oct 20 2007, 02:56 A...   Oct 20 2007, 07:49 AM
|- - ElkGroveDan   QUOTE (djellison @ Oct 19 2007, 11:49 PM)...   Oct 20 2007, 03:20 PM
- - nprev   It should. Most standard GPS devices output data i...   Oct 20 2007, 03:16 AM
|- - ElkGroveDan   QUOTE (nprev @ Oct 19 2007, 07:16 PM) How...   Oct 20 2007, 06:30 AM
- - nprev   It's too bad that there's not a compact di...   Oct 20 2007, 01:08 PM
|- - RJG   I have no specific knowledge of lightweight DGPS k...   Oct 20 2007, 01:26 PM
- - nprev   Ah! Did not consider active antennas, just pas...   Oct 20 2007, 02:02 PM
- - djellison   If I can log temp, pres and GPS with a second Pica...   Oct 20 2007, 03:39 PM
|- - ElkGroveDan   QUOTE (djellison @ Oct 20 2007, 07:39 AM)...   Oct 20 2007, 03:45 PM
|- - tedstryk   QUOTE (ElkGroveDan @ Oct 20 2007, 03:45 P...   Oct 21 2007, 12:58 PM
- - hendric   Doug, For a test flight, have you considered a k...   Oct 23 2007, 07:08 PM
- - djellison   http://www.aria.co.uk/SuperSpecials/Other+...produ...   Oct 23 2007, 07:13 PM
- - hendric   Closest thing I could find is the 3.1 MP version o...   Oct 25 2007, 08:52 PM
|- - rlorenz   QUOTE (hendric @ Oct 25 2007, 03:52 PM) C...   Dec 21 2007, 10:47 PM
- - djellison   The 1.3 MP VistaQuest is what the GMC is. Doug   Oct 25 2007, 09:30 PM
- - paxdan   High ALtitude Object - HALO 30k balloon. This guy...   Oct 27 2007, 08:33 AM
|- - JRehling   [...]   Oct 28 2007, 07:16 AM
- - djellison   I don't think what you describe would work. T...   Oct 28 2007, 08:41 AM
|- - JRehling   [...]   Oct 29 2007, 07:17 AM
- - djellison   Yup - for one of those utterly enormous balloons t...   Oct 29 2007, 08:13 AM
- - rlorenz   QUOTE (djellison @ Sep 26 2007, 07:16 PM)...   Nov 3 2007, 01:50 PM
|- - djellison   QUOTE (rlorenz @ Nov 3 2007, 01:50 PM) , ...   Nov 3 2007, 07:49 PM
|- - rlorenz   QUOTE (djellison @ Nov 3 2007, 02:49 PM) ...   Nov 4 2007, 12:29 PM
- - jamescanvin   I know Ralph was trying to plug non-imaging data b...   Nov 5 2007, 09:23 AM
- - djellison   That's quite a heavy and data-expensive way of...   Nov 5 2007, 10:27 AM
- - djellison   I have a Picaxe data logger working - with Temp, L...   Nov 10 2007, 12:19 AM
- - djellison   An overnight run. Blue line is the LDR - you can ...   Nov 10 2007, 10:45 AM
- - djellison   Just an update - things have been slow, real life ...   Nov 28 2007, 02:45 PM
|- - rlorenz   QUOTE (djellison @ Nov 28 2007, 09:45 AM)...   Dec 16 2007, 04:56 PM
|- - lyford   QUOTE (rlorenz @ Dec 16 2007, 08:56 AM) A...   Dec 16 2007, 07:39 PM
|- - rlorenz   QUOTE (lyford @ Dec 16 2007, 02:39 PM) An...   Dec 18 2007, 12:37 AM
|- - lyford   Woo hoo! Between AGU proceedings and the US D...   Dec 18 2007, 01:38 AM
- - James Sorenson   I have been wanting to build my own balloon, and I...   Jan 5 2008, 02:49 AM
|- - grahamh   QUOTE (James Sorenson @ Jan 5 2008, 02:49...   Jan 9 2008, 05:10 PM
|- - jamescanvin   QUOTE (grahamh @ Jan 9 2008, 05:10 PM) Ho...   Jan 10 2008, 03:51 PM
|- - grahamh   QUOTE (jamescanvin @ Jan 10 2008, 03:51 P...   Jan 11 2008, 12:25 PM
|- - djellison   QUOTE (grahamh @ Jan 11 2008, 12:25 PM) p...   Jan 11 2008, 12:29 PM
|- - grahamh   QUOTE (djellison @ Jan 11 2008, 12:29 PM)...   Jan 11 2008, 12:41 PM
|- - marsbug   I'm in the UK, manchester to be exact, and I...   Jan 11 2008, 12:59 PM
- - James Sorenson   I had not yet read till now the technical specific...   Jan 10 2008, 12:16 PM
- - jamescanvin   I'm certainly still very interested in seeing ...   Jan 11 2008, 03:47 PM
- - djellison   Just so no one thinks I've totally forgotten a...   Feb 10 2008, 06:58 PM
|- - djellison   QUOTE (djellison @ Feb 10 2008, 07:58 PM)...   Apr 24 2008, 09:53 PM
- - Vladimir R   Can someone explain me (on easy way) why 'burs...   Feb 24 2008, 04:31 AM
- - djellison   The balloon grows as the atmospheric pressure outs...   Feb 24 2008, 09:59 AM
|- - Vladimir R   QUOTE (djellison @ Feb 24 2008, 10:59 AM)...   Feb 26 2008, 07:17 AM
|- - helvick   Local gravity at 33km altitude is less than it is ...   Feb 26 2008, 08:42 AM
- - djellison   The difference in gravity is negligible. The radi...   Feb 26 2008, 08:35 AM
|- - Vladimir R   QUOTE (djellison @ Feb 26 2008, 09:35 AM)...   Feb 27 2008, 02:46 AM
- - centsworth_II   I'm no expert, but it looks like there is a mi...   Feb 26 2008, 03:58 PM
|- - djellison   QUOTE (centsworth_II @ Feb 26 2008, 03:58...   Feb 26 2008, 04:22 PM
|- - Vladimir R   WIKIPEDIA QUOTE Altitude Gravity decreases with...   Feb 27 2008, 02:31 AM
|- - nprev   The key to understanding this is free-fall, Vladim...   Feb 27 2008, 03:27 AM
- - dvandorn   Free fall is the key way of describing it. A sate...   Feb 27 2008, 03:52 AM
|- - Vladimir R   QUOTE (dvandorn @ Feb 27 2008, 04:52 AM) ...   Feb 27 2008, 04:07 AM
|- - centsworth_II   QUOTE (Vladimir R @ Feb 26 2008, 11:07 PM...   Feb 27 2008, 07:06 AM
|- - Juramike   QUOTE (centsworth_II @ Feb 27 2008, 03:06...   Feb 27 2008, 07:38 AM
|- - RJG   There's a transatlantic balloon attempt underw...   Apr 6 2008, 09:14 AM
- - tfisher   Look on the bright side for that spirit of knoxvil...   Apr 6 2008, 12:40 PM
- - Juramike   (OMG, it's coming right for me! ) It is...   Apr 6 2008, 07:02 PM
- - remcook   I think the 967 number is meters, it says 3172 ft ...   Apr 6 2008, 08:11 PM
- - djellison   And...looking at the imagery ( which is very cool ...   Apr 24 2008, 10:36 PM
|- - AndyG   QUOTE (djellison @ Apr 24 2008, 11:36 PM)...   Apr 25 2008, 08:59 AM
- - jamescanvin   Hmm. I think the lesson I'm taking away from...   Apr 25 2008, 09:00 AM
- - djellison   To be fair - they really did set up that camera to...   Apr 25 2008, 09:09 AM
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