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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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djellison
post Oct 5 2007, 09:06 PM
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Well - my idea of a front-door peep hole lens to get fish-eye for the GMC isn't going to work. On both the old catcam, and the new 3 MP cameras - they're FOV is too large to crop into the round FOV from the lens. So it's a WAM technique that'll have to work.

The normal cameras come apart fairly easily and I was able to hard-solder them to a housing and run them off 2 C cells instead of the two AA's that fit internally. I was also able to strip the flash and it's capacitor off the circuitboard with no ill effect - and I've been able to remove and re-attache the ribbon that drives the LCD with no problems as well. The shutter is actually on a tiny PCB of its own and that will be fine in terms of wiring something up. The trigger circuit that I thought would do the trick may not be up to it - it actually takes a 12v supply which seems excessive.

Current plan for imaging.
  • Find a new triggering mechanism
  • Wire up cat-cam as it is for C-Cell operation (it will happily do image after image at whatever interval I ask for as long as I want all on it's own...I'm not bothered about getting GMC and the other cameras in sync) and do some life-testing of a 4000 mAh C-cell with it - pointing at trees and clouds (appropriate target)
  • Shout at the postal service because I don't have my wide angle mirrors, parachute, radio or half my order of electronic bits and pieces.
  • Carve up these new polystyrene gondola's to make them an appropriate size, glue with a hot glue gun and then find some alu tape and possibly further insulation.
  • Calibrate GMC and normal cameras. (let's call them FOC - Flight Observation Cameras - FOC A, B, C...from top to bottom) Find their FOV's and figure out a means to mount them. The way the l see it - A can mount in a side wall, C in the floor - but B is more difficult without cutting a lot of polystyrene or putting the camera almost outside.
Gizmo has a thing for Elysium and Chryse... she reached up like a Mearcat and pulled the pin I put in at the V1 landing site smile.gif

Doug
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- djellison   High altitude balloon payload   Sep 26 2007, 11:16 PM
- - helvick   I'm definitely on board for this but I'm i...   Sep 27 2007, 06:32 AM
|- - dvandorn   QUOTE (helvick @ Sep 27 2007, 01:32 AM) I...   Sep 27 2007, 03:26 PM
- - Paolo Amoroso   QUOTE (djellison @ Sep 27 2007, 01:16 AM)...   Sep 27 2007, 09:39 AM
- - djellison   That's what WAM means - Wide Angle Mirror - yo...   Sep 27 2007, 10:06 AM
|- - Paolo Amoroso   QUOTE (djellison @ Sep 27 2007, 12:06 PM)...   Sep 27 2007, 01:34 PM
- - djellison   A starter for 10: Powershot A570IS (IS would be a...   Sep 27 2007, 02:15 PM
- - helvick   Things to bear in mind. Not all digital cameras...   Sep 27 2007, 04:20 PM
|- - ElkGroveDan   QUOTE (helvick @ Sep 27 2007, 08:20 AM) A...   Sep 28 2007, 04:46 AM
|- - jamescanvin   QUOTE (helvick @ Sep 27 2007, 05:20 PM) I...   Sep 28 2007, 02:04 PM
- - nprev   Well, here's something for that; not cheap, th...   Sep 28 2007, 12:10 AM
|- - helvick   QUOTE (nprev @ Sep 28 2007, 01:10 AM) Wel...   Sep 28 2007, 08:14 AM
- - Juramike   This is an absolutely excellent idea. I'll vo...   Sep 28 2007, 04:33 AM
- - djellison   I saw 'kit' and thought 'great- I...   Sep 28 2007, 07:40 AM
- - djellison   The smartphone is a genius idea - it would make an...   Sep 28 2007, 11:38 AM
- - AndyG   Here's a more-or-less self-explanatory table o...   Sep 28 2007, 12:06 PM
- - jamescanvin   Great info AndyG. Looking at some of the other fo...   Sep 28 2007, 12:41 PM
- - djellison   At that level it's a little bit about luck - b...   Sep 28 2007, 12:57 PM
|- - ustrax   Hey Doug...what do you think of this first approac...   Sep 28 2007, 01:43 PM
- - nprev   Nice logo, ustrax! Just a general engineeri...   Sep 28 2007, 02:05 PM
- - djellison   Payload wouldn't be thermally 'controlled...   Sep 28 2007, 02:23 PM
|- - nprev   QUOTE (djellison @ Sep 28 2007, 07:23 AM)...   Sep 28 2007, 03:57 PM
|- - JRehling   [...]   Sep 28 2007, 05:36 PM
- - jamescanvin   One more stitching test using the SABLE-3 images. ...   Sep 28 2007, 02:38 PM
|- - ustrax   You know how this guys are Doug... Seing those ...   Sep 28 2007, 02:43 PM
- - djellison   Storage, Volume, Mass, Power, Money If you can ...   Sep 28 2007, 03:13 PM
- - scalbers   Hi - this link has a nice high altitude photo from...   Sep 28 2007, 04:51 PM
- - Juramike   One possibility might be to put all the batteries ...   Sep 28 2007, 04:51 PM
- - djellison   Actually - the altitude will be limited by the env...   Sep 28 2007, 05:55 PM
- - nprev   Good point, Doug. However, ascent velocity is stil...   Sep 28 2007, 06:08 PM
|- - Astrophil   Here's an idea for a future mission: re-enact ...   Sep 29 2007, 11:02 AM
- - dvandorn   Have y'all thought about where you'd want ...   Sep 29 2007, 05:22 AM
- - djellison   Actually - the FAA ( and I'm looking up the UK...   Sep 29 2007, 11:10 AM
- - djellison   Just a bit of fun using Google Sketchup. Never use...   Sep 29 2007, 09:52 PM
|- - ElkGroveDan   QUOTE (djellison @ Sep 29 2007, 01:52 PM)...   Sep 29 2007, 10:04 PM
- - djellison   I think it just lets you interface with other form...   Sep 29 2007, 10:10 PM
- - ngunn   I really hope you guys pull this off. Unfortunatel...   Sep 30 2007, 07:54 AM
- - remcook   Cool project! How much would a weather balloon...   Sep 30 2007, 09:30 AM
|- - ugordan   QUOTE (remcook @ Sep 30 2007, 11:30 AM) I...   Sep 30 2007, 09:58 AM
- - remcook   By the way, did this link get mentioned? http://w...   Sep 30 2007, 09:43 AM
- - Juramike   The twin balloon idea is pretty good. Launching t...   Sep 30 2007, 02:50 PM
|- - ugordan   QUOTE (Juramike @ Sep 30 2007, 04:50 PM) ...   Sep 30 2007, 03:11 PM
- - djellison   Plus -two of everything to buy (and in this case, ...   Sep 30 2007, 03:18 PM
|- - nprev   QUOTE (djellison @ Sep 30 2007, 08:18 AM)...   Sep 30 2007, 06:33 PM
|- - dvandorn   QUOTE (djellison @ Sep 30 2007, 10:18 AM)...   Oct 1 2007, 04:39 AM
- - dvandorn   Well... considering the fact that Voyagers 1 and 2...   Oct 1 2007, 04:37 AM
|- - ugordan   QUOTE (dvandorn @ Oct 1 2007, 06:37 AM) W...   Oct 1 2007, 08:27 AM
|- - tedstryk   QUOTE (dvandorn @ Oct 1 2007, 04:37 AM) W...   Oct 4 2007, 09:23 PM
- - AndyG   Is there an issue with expanded polystyrene at ver...   Oct 1 2007, 11:12 AM
|- - djellison   QUOTE (AndyG @ Oct 1 2007, 12:12 PM) Is t...   Oct 1 2007, 12:20 PM
- - djellison   Status update : Proposal : <2kg payload - on t...   Oct 1 2007, 09:43 PM
- - volcanopele   I would seriously look at the design of Huygens as...   Oct 1 2007, 10:01 PM
- - djellison   I was having similar thoughts, how controlled can ...   Oct 1 2007, 10:48 PM
- - nprev   Weight distribution would also be very important f...   Oct 1 2007, 11:59 PM
- - djellison   The problem isn't a million miles from MER ter...   Oct 2 2007, 06:25 AM
- - jamescanvin   I don't think controlling the rotation is goin...   Oct 2 2007, 09:45 AM
- - djellison   Discovered the FM transmitter may be a no-no in th...   Oct 2 2007, 11:11 AM
- - ngunn   Doug - I wanted to reply to your paragraph about o...   Oct 2 2007, 11:15 AM
- - djellison   For stereo to work - you either have to have a ver...   Oct 2 2007, 11:27 AM
|- - JRehling   [...]   Oct 2 2007, 05:40 PM
|- - ngunn   QUOTE (JRehling @ Oct 2 2007, 06:40 PM) W...   Oct 2 2007, 08:04 PM
- - ngunn   OK this is getting off topic and I won't keep ...   Oct 2 2007, 11:56 AM
- - AndyG   Thirty Thousand Metres Via A Plastic Bag The abo...   Oct 2 2007, 12:47 PM
- - djellison   The envelope itself is arguably the easy part. Bu...   Oct 2 2007, 12:55 PM
- - jamescanvin   OK a few simulations of camera coverage. Two came...   Oct 2 2007, 02:19 PM
- - djellison   Now that's cunning - and even though the data ...   Oct 2 2007, 02:44 PM
- - jamescanvin   Your wish is my command... In each of these I...   Oct 2 2007, 05:22 PM
- - jamescanvin   4) Three cameras all in landscape with elevations ...   Oct 2 2007, 05:43 PM
- - djellison   Well - I've just ordered three very VERY cheap...   Oct 2 2007, 08:31 PM
- - helvick   Stunning work with those coverage sims James. Th...   Oct 2 2007, 09:46 PM
- - djellison   Well - I think with these cheap cameras I've g...   Oct 2 2007, 10:22 PM
|- - JRehling   [...]   Oct 3 2007, 06:02 AM
|- - AndyG   QUOTE (djellison @ Oct 2 2007, 11:22 PM) ...   Oct 3 2007, 08:57 AM
- - ElkGroveDan   If Helvick can't come up with another unit, I ...   Oct 2 2007, 11:12 PM
- - djellison   Someone else can drown their cameras intentionally...   Oct 3 2007, 07:00 AM
- - djellison   A 90p thermistor's great...BUT....you need som...   Oct 3 2007, 09:15 AM
|- - JRehling   [...]   Oct 3 2007, 05:59 PM
|- - centsworth_II   QUOTE (JRehling @ Oct 3 2007, 01:59 PM) I...   Oct 4 2007, 10:31 PM
- - AndyG   Monitoring various sensors sounds exactly like a m...   Oct 3 2007, 10:02 AM
- - volcanopele   Someone suggested donating a Treo. There might be...   Oct 4 2007, 10:37 PM
- - helvick   Re Treo's and other potential offerings. They ...   Oct 5 2007, 12:13 AM
|- - ElkGroveDan   QUOTE (helvick @ Oct 4 2007, 04:13 PM) Re...   Oct 5 2007, 04:12 AM
|- - Greg Hullender   QUOTE (helvick @ Oct 4 2007, 05:13 PM) . ...   Oct 5 2007, 11:51 PM
- - volcanopele   It is sad because I refuse to use a Windows Mobile...   Oct 5 2007, 12:30 AM
- - djellison   Will it work in the UK do you think? Quad/Tri band...   Oct 5 2007, 08:27 AM
|- - ElkGroveDan   QUOTE (djellison @ Oct 5 2007, 12:27 AM) ...   Oct 5 2007, 03:03 PM
- - djellison   Got my three very very cheap cameras and the polys...   Oct 5 2007, 04:38 PM
- - djellison   Well - my idea of a front-door peep hole lens to g...   Oct 5 2007, 09:06 PM
- - lyford   I have nothing to offer this project except encour...   Oct 6 2007, 03:24 AM
- - djellison   These crap 3 megapixel cameras will happily record...   Oct 6 2007, 11:00 AM
|- - JRehling   [...]   Oct 6 2007, 07:10 PM
|- - djellison   QUOTE (JRehling @ Oct 6 2007, 08:10 PM) I...   Oct 6 2007, 09:33 PM
- - paxdan   I have been following this thread pretty closely. ...   Oct 6 2007, 11:07 AM
- - djellison   Their wiki doesn't have many details on the ti...   Oct 6 2007, 02:29 PM
- - DEChengst   This sounds pretty exciting In my mind this can ...   Oct 8 2007, 05:19 PM
|- - djellison   QUOTE (DEChengst @ Oct 8 2007, 06:19 PM) ...   Oct 8 2007, 08:22 PM
- - nprev   Really! What kind of sensor is used to detect ...   Oct 9 2007, 03:27 AM
|- - ElkGroveDan   QUOTE (nprev @ Oct 8 2007, 07:27 PM) Real...   Oct 9 2007, 04:29 AM
|- - JRehling   [...]   Oct 9 2007, 05:34 AM
- - djellison   The 144.8 Mhz FM APRS kit arrived. I need to get ...   Oct 12 2007, 12:17 AM
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