highaltitude.log.20110511

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[08:19] <SamSilver> bbl
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[08:27] <Josh_> Hi everyone
[08:27] <jonsowman> hi Josh_
[08:28] <Josh_> looking for some advice.....looking at a secondary camera for my payload....doesn't need to be anything fancy but needs to record for 2 hoursish continuosly, be fairly light (100g) and fairly cheap
[08:29] <Josh_> any suggestions on where to buy from?
[08:29] <jonsowman> photo/video?
[08:29] <Josh_> might even be able to incorporate the cdhk software if i have time
[08:29] <Josh_> either or
[08:29] <Josh_> preferably video i guess
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[08:35] <Josh_> just a cheap and cheerful camera will do as a backup incase the primary camera has a problem
[08:35] <jonsowman> ebay I guess
[08:35] <jonsowman> we used IXUS 40s on Apex II
[08:35] <jonsowman> the Canon A560 is quite cheap and very good
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[08:36] <Josh_> ok thanks
[08:37] <Josh_> i've also been looking at those 'spy' cameras
[08:38] <Josh_> they seem to fit the bill but not sure how good image quality would be
[08:40] <fsphil> they tend to have a rolling shutter, so any movement gets 'warped'
[08:41] <fsphil> if the payload is moving about a lot the video just turns to jelly
[08:41] <Josh_> ahhh i see!]
[08:41] <Josh_> thanks
[08:42] <fsphil> they're very light and can be got quite cheap though, could be worth it :)
[08:43] <Darkside> man, contact is a freaking awesome moie
[08:43] <Darkside> movie*
[08:43] <fsphil> agreed++
[08:43] <Darkside> i'm also reading the book at the moment
[08:44] <fsphil> second dvd I ever bought
[08:44] <Darkside> book is far better than the movie imo
[08:44] <fsphil> and more than makes up for the first dvd I bought
[08:44] <Darkside> in the movie they kind of soften teh whole atheism aspect
[08:44] <Darkside> which is pretty strong in the book
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[09:00] <futurity> Morning, does anyone know if jcoxon managed to get his payload of of the tree in the end?
[09:01] <jonsowman> don't think so
[09:01] <futurity> oh dear
[09:02] <futurity> i take it that this payload would have been the one launched on Saturday?
[09:02] <jonsowman> yes
[09:10] <Randomskk> he may recover it yet
[09:13] <NigelMoby> Chop the tree down :p
[09:21] <fsphil> they might just do that
[09:22] <cuddykid> if its in the middle of nowhere you could probably get away with it lol
[09:22] <fsphil> they have permission from the land owner
[09:22] <Josh_> chuck a bit of rope around the nearest branch and climb!
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[09:38] <futurity> if they have permission thats good
[09:38] <futurity> is the payload working well enough though to launch on Saturday>
[09:38] <jonsowman> unlikely
[09:39] <futurity> is that due to the gps module used do you think?
[09:39] <jonsowman> hard to say
[09:39] <jonsowman> it should have been fine, since it's a uBlox 5
[09:39] <jonsowman> as long as it's kept in nav mode, it should cope
[09:39] <jonsowman> but the fact it cut out just below 18km is a huge coincidence
[09:41] <futurity> yep
[09:41] <futurity> where did it land in the end?
[09:46] <fsphil> that happened on jcoxon once before didn't it? the ublox5 cutting out?
[09:48] <jonsowman> yeah
[09:48] <jonsowman> bh5?
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[10:18] <cuddykid> anyone flown a Hwoyee balloon here?
[10:19] <jonsowman> ATLAS yesterday was a 1000g hwoyee
[10:20] <cuddykid> with the 7.7cm neck diameter does a custom filler have to be made?
[10:20] <jonsowman> we used our normal filler + cable ties and gaffa tape
[10:21] <jonsowman> as long as it seals it's fine, the pressure difference is negligible
[10:21] <cuddykid> ahh, ok, thanks
[10:21] <cuddykid> so just wrap the extra neck around filler then cable tie etc?
[10:21] <jonsowman> yup
[10:22] <jonsowman> duct tape round the bottom to seal
[10:22] <cuddykid> good stuff
[10:25] <fsphil> that also works well for a standard hosepipe + totex
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[10:38] <cuddykid> what is the standard (or best for HAB) diameter for cable ties? around 5mm?
[10:38] <cuddykid> just that the guy who I'm getting them off wants to know what diameter I want!
[10:40] <SpeedEvil> the diameter is the length isn't it?
[10:40] <SpeedEvil> An assorted pack is generally good - or at least some 10cm, some 15cm, some 20cm.
[10:40] <cuddykid> I meant width, sorry
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[11:35] <cuddykid> jcoxon, how's the recovery going?
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[12:18] <NigelMoby> Hmmm
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[13:33] <m1x10> Hi all
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[14:03] <griffonbot> @KB1LQC: That was a lot of sleep. Whew, the K2GXT #ARHAB RITCHIE-1 building + launch just caught up to me. I feel way better now. #hamr #hamradio [http://twitter.com/KB1LQC/status/68315240055578624]
[14:03] Action: Laurenceb_ rage at gimp
[14:03] <Laurenceb_> anyone know how to create a white rectangle?
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[14:18] <DanielRichman> Laurenceb_: select, delete, filltool with white
[14:19] <Laurenceb_> i think i needed to flatten the image
[14:19] <Laurenceb_> gimp is so annoying
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[14:58] <griffonbot> @Hamradio_Ticker: RT @KB1LQC: That was a lot of sleep. Whew, the K2GXT #ARHAB RITCHIE-1 building + launch just caught up to me. I feel way better now. #hamr& [http://twitter.com/Hamradio_Ticker/status/68329030683852800]
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[15:41] Nick change: SAIDias_ -> SAIDias
[15:49] Nick change: SAIDias -> W0OTM
[15:49] <W0OTM> Hello World
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[15:50] <Dan-K2VOL> Hey w0otm
[15:50] <W0OTM> sup sup mr Dan-K2VOL
[15:50] <Dan-K2VOL> Workin the day away here
[15:50] <Dan-K2VOL> u?
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[15:52] <W0OTM> upgrading my ESXi servers
[15:55] <eroomde> aftn'n
[15:55] <eroomde> jcoxon: hi
[15:55] <jcoxon> hey eroomde
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[16:04] <damien7579> dum question/sanity check for the lassen IQ with the ardunio uno: using double-precision positioning wont break anything?
[16:04] <damien7579> default is single which only gives lat/log to 6.5 digits
[16:04] <jcoxon> damien7579, no however arduino only does float
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[16:04] <jcoxon> its doubles are just floats
[16:04] <jcoxon> but yeah it'll be find
[16:05] <jcoxon> fine*
[16:05] <damien7579> cool as after field testing was getting location position 10-50m out due to single
[16:07] <fsphil> 5 decimal places should be well more than 10m accuracy
[16:07] <damien7579> also will extra precision work fine with spacenear.us tracker?
[16:09] <fsphil> ooh handy charge on wikipedia.. http://en.wikipedia.org/wiki/Decimal_degrees
[16:10] <fsphil> 5 decimal places gives an accuracy of 1.11 m at the equator, and better the closer to the poles you get
[16:13] <DanielRichman> Ideally there'd be no reason to use floats on a flight computer. No need really to link with the massive (4kb or something) math library.
[16:13] <fsphil> simplest way might be to just transmit the coordinates as the gps returned them
[16:13] <damien7579> cool thanks for the info. I was confused by the lassen docs too as they state :
[16:14] <damien7579> Single  Float, or 4 byte REAL has a precision of 24 significant bits, roughly 6.5 digits.
[16:14] <DanielRichman> fsphil: it's ~reasonably trivial to convert from ddmm.mm to dd.ddddd for example using ints only
[16:15] <fsphil> DanielRichman, yea, I'm doing that on hadie - no floats at all
[16:15] <DanielRichman> high five
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[16:17] <Laurenceb_> low sqrt(-four)
[16:18] <fsphil> haha
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[16:27] <eroomde> You know the 'bag of sugar' approach to ballast for trans-atlantic - where you dangle a sugar block beneath the payload and if it hits the water is dissolves away and the payload ascends
[16:27] <eroomde> well i have a better idea, also edible
[16:27] <eroomde> a giant berocca
[16:29] <Dan-K2VOL> Heh nice eroomde
[16:29] <eroomde> you'd also be making the fish healthier rather than drunk
[16:30] <DanielRichman> won't it just hit the water, some /a little of it will dissolve, it will bob up a few hundred meters, then back down again
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[16:31] <eroomde> same with the sugar
[16:31] <eroomde> though actually it's denser than water so it should sink a decent bit
[16:31] <eroomde> hopefully
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[16:32] <jonsowman> evening eroomde
[16:32] <eroomde> hello
[16:32] <jonsowman> how're things?
[16:32] <SpeedEvil> Just make a weight out of francium.
[16:32] <eroomde> good. finally got everything sorted for blimp flying today
[16:32] <jonsowman> :)
[16:32] <jonsowman> nice
[16:33] <SpeedEvil> :)
[16:33] <eroomde> and i just ate an entire parmesan
[16:33] <SpeedEvil> <====>
[16:33] <eroomde> so things are really pretty good, all told
[16:36] <jonsowman> a whole one?
[16:36] <eroomde> well, the supermarket standard chunk
[16:37] <jonsowman> that's still a lot of cheese
[16:37] <eroomde> a segment of angle maybe 60 degrees and radius 15cm?
[16:37] <jonsowman> gosh
[16:37] <jonsowman> are you feeling alright? :P
[16:37] <eroomde> cheese is my nemesis and my friend
[16:38] <jonsowman> more the former when you eat that much, I'd've thought
[16:38] <eroomde> that's not much!
[16:38] <eroomde> gosh i'd have about 1kg/day in fraNCE
[16:38] <eroomde> this was barely 200g
[16:38] <jonsowman> haha
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[16:39] <eroomde> http://bash.org/?835030
[16:39] <eroomde> this is I suspect my favourite ^
[16:40] <eroomde> or this one: http://bash.org/?244321
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[16:42] <jonsowman> lol
[16:45] <SamSilver> on that light note i bid you fair well
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[16:48] <cuddykid> 100m of braided nylon cord on the way! :)
[16:49] <imrcly> Dan-K2VOL: https://sites.google.com/site/colinord/Home/diy-3d-scanner/2009 100% cheaper than the david scanner software
[16:50] <Dan-K2VOL> the david software has a free version
[16:50] <kd0mto> not high altitude but awesome http://www.newsdesk.umd.edu/bigissues/release.cfm?ArticleID=2424
[16:50] <imrcly> free trial
[16:50] <kd0mto> human powered helicopter!
[16:51] <fsphil> "Live Stream (requires Silverlight Plugin)"
[16:51] <fsphil> there goes that idea
[16:51] <Dan-K2VOL> Will take a look later imrcly
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[16:53] <BrainDamage> I've got moonlight, and doesn't even work with that
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[17:27] <NigeyS> !top10
[17:27] <HAMBotty> Top10(words): 1. NigeyS(1253) 2. fsphil(1216) 3. eroomde(1083) 4. Randomskk(984) 5. jonsowman(901) 6. MNSP(745) 7. jcoxon(716) 8. Dan-K2VOL(575) 9. ejcweb(447) 10. Laurenceb(363)
[17:27] <NigeyS> :o you're sliping Randomskk :p
[17:28] <fsphil> hmm, I see I have a need to write some more words in order to regain my lead position in the fine chart of words typed into an irc channel
[17:28] <NigeyS> lol
[17:29] Action: LazyLeopard hmmms....
[17:29] <cuddykid> No longer in top 10 :'(
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[17:29] <Dan-K2VOL> Jeez I didn't think I even talked that much
[17:29] <LazyLeopard> How long an interval is it counting?
[17:29] <BrainDamage> I wouldn't say it's necessarily a bad thing :p
[17:30] <NigeyS> LazyLeopard, their live stats
[17:30] <NigeyS> so its constantly updating
[17:31] <NigeyS> http://nigey.co.uk:8033
[17:31] <NigeyS> for the full reports
[17:31] <cuddykid> lol
[17:31] <fsphil> my new notam arrived today, begins after the weekend, typically
[17:31] <NigeyS> lol sods law phil
[17:32] <fsphil> don't think the weather's to be too nice this weekend anyway so probably for the best
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[17:32] <cuddykid> glad you've got one fsphil, still haven't heard about mine yet :S
[17:32] Action: LazyLeopard remembers a USEnet group to which monthly posting stats were posted. A few folks started to compete for the top poster position, and demonstrated, along the way, that quantity and quality are not related. ;)
[17:32] <NigeyS> :o you killed the bot
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[17:32] <cuddykid> haha lazyleopard
[17:33] <fsphil> cuddykid, this one was suppose to be for a few weeks ago
[17:33] Action: NigeyS must fix that bug
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[17:33] <cuddykid> fsphil, when did you apply for the notam?
[17:33] <cuddykid> oh dear, Miller needs to get his act together!
[17:33] <fsphil> this one, 14th March !
[17:33] <cuddykid> :O!!
[17:34] <cuddykid> that is shocking
[17:34] <fsphil> it is normally 28 days, no idea why this one took so long
[17:34] <NigeyS> bank holidays prolly phil
[17:34] <NigeyS> they tend to royally cock things up :/
[17:34] <fsphil> I applied for a couple at around the same time, he might have put the second one into a queue
[17:34] <cuddykid> lol NigeyS
[17:34] <fsphil> still, I do like bank holidays :)
[17:34] <fsphil> got one at the end of the month
[17:35] <fsphil> so another potential launch day
[17:35] <cuddykid> good good
[17:35] <NigeyS> fsphil, might launch pico around the same time
[17:35] <NigeyS> need a new launch site though, away from all those nasty power cables!
[17:35] <cuddykid> got until beginning of July for my launch
[17:35] <fsphil> wonder if we could do a balloon <> balloon communications thing
[17:36] <NigeyS> it'd work in theory
[17:36] <BrainDamage> what for? setup as repetitors?
[17:36] <NigeyS> i like the repeater stuff that W0OTM does on his
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[17:37] <fsphil> a data repeater, yea
[17:37] <fsphil> I'm doing an FM repeater too next month
[17:37] <NigeyS> yey
[17:38] <fsphil> hopefully if the winds are right anyway
[17:38] <NigeyS> that with the 869mhz ?
[17:38] <fsphil> want it to drift as far as possible
[17:38] <fsphil> the repeater will be on 433, but the 869 will be doing telemetry on that flight
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[17:38] <NigeyS> ahh sweet
[17:39] <fsphil> probably no camera, keep things simple
[17:39] <NigeyS> yeah nice and simple on a first flight
[17:40] <fsphil> it'll need a big yagi to hear it I bet
[17:40] <fsphil> but should be fun hearing if anyone uses it
[17:41] <NigeyS> oh aye, send some emails round to the ham clubs and you should get a fair few on it
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[17:50] <W0OTM> .
[17:51] <NigeyS> ..
[17:52] <NigeyS> how's you Marshall ?
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[17:56] <W0OTM> im good
[17:56] <W0OTM> you?
[17:57] <NigeyS> very well thanks :D
[17:58] <NigeyS> forgot to ask, how did the new trailer perform in the latest launch ?
[17:58] <W0OTM> really nicely
[17:58] <W0OTM> love it :)
[17:58] <NigeyS> sweet! it's a lovely bit of kit
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[17:59] <NigeyS> btw you should seal the pvc tube at one end, stop the critters getting in there! lol
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[18:13] <eroomde> jonsowman: un-be-f*cking-lievable
[18:13] <NigeyS> hmm.. hi eroomde *hides*
[18:15] <eroomde> some stuff on the cusf mailing list
[18:15] <NigeyS> oo
[18:16] <eroomde> a group we are working with just politely wondered if they for PR purposes could edit out the kid's logo on a teddies-in-space picture and photoshop in their own logo, just for their purposes
[18:16] <NigeyS> :o oh yeah, like that's really fair isnt it!
[18:16] <eroomde> as in, photoshop the teddies space suits
[18:17] <NigeyS> pardon the pun but i imagine that idea's gone down like a lead balloon
[18:17] <eroomde> you betcha
[18:17] <eroomde> brazen piss-taking
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[18:17] <NigeyS> that's putting it mildly
[18:17] <NigeyS> aren't those pictures (c) CUSF anyway ?
[18:17] <eroomde> yep
[18:18] <eroomde> we said they could use them for their publicity though
[18:18] <NigeyS> ahh but if you didnt say they could modify them....
[18:19] <eroomde> hell no
[18:20] <NigeyS> easy solution, threaten them with a copyright infringement case if they go ahead :D
[18:22] <eroomde> oh i'm sure they won't
[18:22] <eroomde> we're helping them actually do this
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[18:22] <NigeyS> :D btw slightly OT .. how is the processing going from the blimp data?
[18:22] <eroomde> NigeyS: difficult
[18:22] <NigeyS> oh
[18:22] <eroomde> trying to extract features from snow fields is proving challenging
[18:23] <NigeyS> blimey, that doesnt even remotely sound easy!
[18:23] <eroomde> one has to add extra parameters into the optimisation problem, which was already very high dimensional
[18:23] <SpeedEvil> I was browsing ebay for stuff, and find it amusing to come across jet engine blades.
[18:23] <eroomde> and that slows things down by a power each time you do it
[18:23] <SpeedEvil> Each one saying 'not for use as spares'
[18:24] <NigeyS> eroomde, a bit over my technical head but that doesnt sound ideal :(
[18:24] <eroomde> it's tough basically
[18:25] <NigeyS> SpeedEvil, how the hell did you come across those? lol
[18:25] <SpeedEvil> NigeyS: I was idly wondering if people sell RC jet engines on ebay cheap.
[18:25] <SpeedEvil> They don't.
[18:25] <eroomde> the clusters doing the optimisation are pegged at 100%
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[18:25] <NigeyS> blimey talk about maxed out
[18:25] <eroomde> also there are stupid things like shadows of people which move
[18:25] <NigeyS> SpeedEvil, no such thing as cheap rc blades :(
[18:25] <eroomde> so having to make the algorithm more robust
[18:25] <eroomde> hey, it's interesting research!
[18:26] <NigeyS> ahh yes, shadows will cause issues, i can see that! but hey if it was easy ...........
[18:26] <SpeedEvil> NigeyS: yeah - I wasn't expecting itt o be.
[18:26] <SpeedEvil> Features from snow-fields?
[18:26] <SpeedEvil> Surely this is a trivial problem.
[18:26] <SpeedEvil> After all - every snowflake is unique.
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[18:26] <NigeyS> snowflakes amaze me.. to be perfectly honest
[18:27] <SpeedEvil> Indeed.
[18:27] <SpeedEvil> Snowflakes - how do they work.
[18:27] <NigeyS> so much for nature doesnt do straight lines, it also does symmetry ! (sp)
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[18:32] <cuddykid> advice needed!! - I need to sew a loop into the top of my hexagonal parachute so I can run the cord up to the balloon, however have no idea how best to do this to minimise rip etc! Can anyone offer some advice?
[18:32] <NigeyS> find a seamstress
[18:33] <eroomde> or use one of those brass fabric ring crimps
[18:33] <Laurenceb> lol st replied to my email
[18:34] <NigeyS> hey laurenceb
[18:34] <Laurenceb> thanking me for pointing out all the errors in their datasheets
[18:34] <NigeyS> :o
[18:34] <NigeyS> theyre going to provide you with free parts for life now? :D
[18:35] <Laurenceb> i wish
[18:35] <NigeyS> hehe, scary though, when the manufacturers themselves get their own data wrong :|
[18:35] <cuddykid> ok, professional it will probably be!
[18:35] <cuddykid> eroomde: have you a link or photo of the crimps?
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[18:36] <Laurenceb> when they specify 100uF alu caps for decoupling an accel you know something is wrong
[18:38] <eroomde> cuddykid: http://www.ehow.com/how_7913214_put-eyelets-snaps-fabric-tool.html
[18:39] <cuddykid> thanks!
[18:39] <NigeyS> laurenceb eek thats a rather large cockup!
[18:39] <SpeedEvil> http://cgi.ebay.co.uk/CS-New-Design-120mm-Ducted-Fan-Unit-w-HET-935kv-7kg-/330526224781?pt=Radio_Control_Parts_Accessories&hash=item4cf4e5f18d
[18:39] <SpeedEvil> The ultimate 120mm case fan?
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[18:40] <Laurenceb> 7kg what the..
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[18:40] <Laurenceb> very expensive
[18:41] <SpeedEvil> 7Kg thrust though.
[18:43] <Laurenceb> only need 20 or so for hoverboards
[18:43] <SpeedEvil> Indeed. :)
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[19:05] <Elwell> sounds like dell fit those to their bladecentres
[19:06] <Elwell> iphone (yeah I iknow, highly accurate sound level meter) says ~100dB behind those racks
[19:07] <fsphil> what?
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[19:11] <Elwell> the fan
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[19:24] <Laurenceb> http://kotisivu.dnainternet.net/sakrkorh/OP/IMG_1500e.jpg
[19:24] <Laurenceb> interesting
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[19:51] Nick change: SAIDias_ -> SAIDias
[19:53] Nick change: SAIDias -> W0OTM
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[20:08] <jonsowman> eroomde: lol
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[20:10] <NigeyS> ello jonsowman
[20:10] <jonsowman> hi NigeyS
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[21:11] <Lunar_Lander> hello
[21:12] <SpeedEvil> o
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[21:22] <Lunar_Lander> hi SpeedEvil hibby fsphil NigeyS
[21:23] <fsphil> hi hi Lunar_Lander
[21:23] <Lunar_Lander> how's the life?
[21:24] <fsphil> c'est fantastique
[21:26] <W0OTM> hi hi hi hi
[21:27] <Lunar_Lander> :)
[21:27] <Lunar_Lander> donated blood on tuesday
[21:27] <Lunar_Lander> was OK
[21:28] <fsphil> "I'm here to donate some blood" ... "Someone else's"
[21:29] <fsphil> Best line from an old came, oddly enough called Blood
[21:29] <Lunar_Lander> lol
[21:30] <SpeedEvil> http://www.theonion.com/video/anonymous-philanthropist-donates-200-human-kidneys,14216/ fsphil
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[21:32] <fsphil> lol,
[21:32] <Lunar_Lander> did the guy steal them from his workplace or so?
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[21:34] <Lunar_Lander> whoa
[21:34] <Lunar_Lander> or did he kill those 100 people D:?
[21:35] <fsphil> You familiar with The Onion Lunar_Lander?
[21:35] <fsphil> UK from space, typically cloudy: http://www.flickr.com/photos/magisstra/5709198095
[21:35] <Lunar_Lander> oh yeah
[21:35] <Lunar_Lander> damn
[21:36] <Lunar_Lander> I was wondering about that next video
[21:36] <fsphil> lol
[21:36] <Lunar_Lander> with the general eating while holding a report
[21:36] <Lunar_Lander> it looked staged
[21:38] <russss> fsphil: did you see this one?
[21:38] <russss> http://twitpic.com/4v8pso
[21:38] <russss> (view full size is strongly recommended)
[21:38] <fsphil> oh sweet
[21:38] <SpeedEvil> Neat.
[21:39] <fsphil> unusual angle
[21:39] <Lunar_Lander> did you read it?
[21:39] <russss> I rotated it 90 degrees anticlockwise and put it on my desktop
[21:39] <Lunar_Lander> twitpic has the right to sell photos
[21:40] <russss> Lunar_Lander: yeah, I saw that. Doesn't matter to NASA though!
[21:40] <Lunar_Lander> true :)
[21:40] <Lunar_Lander> rather for Katy Perry
[21:40] <Lunar_Lander> http://twitpic.com/8apmu
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[21:41] <russss> I don't know where all this imagery ends up though
[21:41] <russss> the oblique stuff including space doesn't seem to end up on http://eol.jsc.nasa.gov/
[21:42] <russss> although some of them do. I see this one is on there. http://eol.jsc.nasa.gov/sseop/images/EO/highres/ISS007/ISS007-E-10807.JPG
[21:44] <russss> perhaps the search just sucks
[21:44] <Lunar_Lander> yea
[21:44] <SpeedEvil> Just look them up by the geotags. :)
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[22:05] <russss> he just posted this one, which is pretty awesome http://twitpic.com/4we7sh
[22:07] <fsphil> I would never get any work done on the ISS
[22:10] <russss> heh yeah
[22:10] <russss> me neither
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[22:30] <Lunar_Lander> good nighz
[22:30] <Lunar_Lander> *night
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[00:00] --- Thu May 12 2011