highaltitude.log.20100510

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[02:11] Action: juxta sighs
[02:11] <juxta> telephone carriers are terrible here. I've been trying to provision a landline for about a month now
[02:13] Action: SpeedEvil forgets where juxta is.
[02:19] <juxta> SpeedEvil: australia
[02:22] <SpeedEvil> Ah - I remember now.
[02:22] Action: SpeedEvil needs more sleep. Or less sleep. Or something.
[02:23] <SpeedEvil> I would suggest satellite phone - but that is pretty much laughably expensive.
[02:23] <juxta> haha
[02:23] <juxta> I don't even want a landline
[02:23] <juxta> I just need it for DSL
[02:24] <SpeedEvil> ah
[02:24] Action: SpeedEvil wishes his DSL were better
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[02:31] <juxta> hurrah, I think I may have a positive outcome
[02:32] <juxta> finally
[02:32] <juxta> they wont connect my line sooner than Thursday, but I've managed to get them to give me free 3G internet until my DSL is up
[02:35] <SpeedEvil> In australia - that's like a hundred billion dollars?
[02:35] <SpeedEvil> :)
[02:36] <SpeedEvil> I'm happy with my 3G deal - which is 20 quid for 6 months prepaid
[02:36] <SpeedEvil> and no other fees
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[02:53] <hapt1K> hi rev
[02:53] <hapt1K> :)
[02:54] <revstray> howdy
[02:55] <hapt1K> want to send something to space
[02:55] <hapt1K> these are the guys :)
[02:56] <revstray> we were kicking around the idea of finding lost space junk (e.g. Galaxy 15) and seeing if one could establish communication with it
[02:56] <SpeedEvil> It's a bent pipe sat
[02:56] <SpeedEvil> you can generally communicate through those if you find the uplonk freq
[02:57] <SpeedEvil> uplink
[02:57] <SpeedEvil> and can overpower or find holes where other users of it are not communicating
[02:58] <revstray> nifty, I'm barely into HAM radio right now, any recommended resources for learning about sat. communication?
[03:00] <SpeedEvil> http://www.google.com/search?ie=UTF-8&oe=UTF-8&sourceid=navclient&gfns=1&q=%27bent+pipe%27+satellite+unauthorised
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[13:25] <edmoore> jonsowman or Randomskk ping
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[13:56] <Randomskk> edmoore hi
[13:57] <edmoore> ah good
[13:57] <edmoore> can i put you down as a contact on renewed notam?
[13:57] <Randomskk> sure
[13:57] <edmoore> it means you'll get calls from pilots at 7.30am
[13:57] <Randomskk> I love getting calls from pilots at 0730
[13:57] <edmoore> fine
[13:58] <jonsowman> edmoore: hi
[13:58] <jonsowman> ditto for me
[13:58] <edmoore> are you two cojoined...
[13:58] <edmoore> well, i can only put one of you down as the primary contact
[13:58] <jonsowman> nope, we just have the same stuff at the same time
[13:58] <Randomskk> sigh. I guess we'll have to have a fight to the death then
[13:59] <jonsowman> haha i don't mind
[13:59] <Randomskk> nor do I, hence the requirement for the fight
[13:59] <jonsowman> coin toss?
[14:00] <Randomskk> drawing straws more like
[14:00] <edmoore> well it's only for the next 6 months
[14:00] <jonsowman> i honestly don't mind at all
[14:00] <edmoore> I'll swap Dan for one of you two.
[14:00] <edmoore> can you pm me your phone number adam
[14:01] <Randomskk> done
[14:06] <edmoore> Randomskk how is your surname spelt?
[14:08] <edmoore> nvm
[14:11] <Randomskk> Greig if you didn't get it, brb
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[19:21] <DanielRichman> Intermediate practicals job done.
[19:25] <jonsowman> DanielRichman: nice one
[19:27] <DanielRichman> exam 24th :P
[19:28] <DanielRichman> then I take the soonest advanced exam possible: I want to operate the club callsign G4RSC (it hasn't been used in ~30 years apparently)
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[20:43] <Randomskk> DanielRichman: nice
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[22:33] <BeatJunkie> Maybe someone could answer me a question which I couldn't anser myself by using google: why aren't vents used to prevent a high altitude balloon from bursting?
[22:33] <epictetus> I've always wondered that too.
[22:34] <epictetus> like if you had a small leak where the rate of the leak was appropriate, even
[22:34] <sbasuita> this has been done
[22:34] <sbasuita> they're called zero pressure balloons, and you can get really long floats
[22:35] Nick change: SpeedEvil1 -> SpeedEvil
[22:35] <SpeedEvil> They are however rather complex
[22:35] <SpeedEvil> the vent can go wrong, or be the wrong size.
[22:36] <BeatJunkie> tanks a lot! :) Now I got my keword to look further.
[22:36] <BeatJunkie> +h
[22:36] <SpeedEvil> But - also - for the normal latex balloons, the balloon eill only last a few hours at most in the sun
[22:37] <BeatJunkie> okay - but a few hours is way more than a few minutes at high altitudes.
[22:37] <SpeedEvil> well - 'normal' balloons can ascend as slow as 2m/s or so easily
[22:38] <SpeedEvil> This gets you well over an hour over 25km
[22:39] <SpeedEvil> And what would a few hours versus an hour do for you? Other than make the balloon drift further, and be harder to recover
[22:40] <BeatJunkie> Yeah - but I'm interested in how far it can fly.
[22:41] <BeatJunkie> Around the world would be fun... ;)
[22:41] <SpeedEvil> UV is a major problem.
[22:41] <SpeedEvil> As is - for zero pressure balloons - the diurnal variation in pressures causing lift gas to migrate out
[22:42] <SpeedEvil> the alternative is superpressure balloons, but those are more complex to make
[22:42] <BeatJunkie> you could use some kind of foil for the UV thing. And a little gas supply for the gas leak. Or am I missing something?
[22:44] <SpeedEvil> Making a large foild balloon is non-trivial
[22:44] <SpeedEvil> gas cylinders are heavy
[22:44] <SpeedEvil> gas generators are unreliable
[22:45] <BeatJunkie> yeah - you're probably right. But I like the idea :)
[22:46] <SpeedEvil> There are a lot fo fun ideas.
[22:46] <SpeedEvil> Finding the cheap and easy ones is the hard bit.
[22:46] <SpeedEvil> Or getting the money for the others.
[22:48] <BeatJunkie> well, however. Thank you again very much for the provided keywords. I'm going to read on. cu.
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[00:00] --- Tue May 11 2010