highaltitude.log.20090211

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[00:31] <Laurenceb> yo
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[11:12] <SpeedEvil> natrium42: DX order changed status - most of my stuff is now ready to ship. (and yes, >1 month is screwy)
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[11:50] <edmoore> hi oy
[11:51] <SpeedEvil> edmoore: I don't suppose you've any idea of the retail pricing of that prepeg?
[11:52] <edmoore> absolutely none I'm afriad
[11:52] <SpeedEvil> np
[11:52] <edmoore> I'm just thankful they can find stuff to give us
[11:54] Action: SpeedEvil wishes for local prepreg and liquid gas vendors.
[11:57] <edmoore> :)
[11:57] <edmoore> what's the plan?
[11:58] <edmoore> jcoxon is good at planning
[11:58] <edmoore> often at launches there's a familiar 'Ok. The plan here is: ...'
[11:58] <edmoore> James has Everything Under Control
[12:03] Action: SpeedEvil wants to make an orbital rocket.
[12:04] <SpeedEvil> Scalable stages - 1 part structure/guidance, 3 parts fuel, 1 part payload or recovery device.
[12:04] <SpeedEvil> each stage can be flown multiple times as a single stage, before being stacked and orbited.
[12:05] <SpeedEvil> total mass of 5Kg, 25Kg, 125Kg, 625Kg, ...
[12:06] <SpeedEvil> 4 stages LEO, 6 stages the moon, 8 stages mars!
[12:23] <SpeedEvil> amazon recommended --
[12:23] <SpeedEvil> They keep sending me emails about cheap GPS navigators.
[12:23] <SpeedEvil> As I have a couple of books on GPS on my wishlist.
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[17:51] <Laurenceb> hi
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[18:27] <SpeedEvil> hi
[18:37] <Hiena> http://www.youtube.com/watch?v=t-XC0dxerYs&feature=related
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[18:39] <jcoxon> evening all
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[18:54] <jcoxon> evening edmoore_
[18:58] <natrium42> h
[18:58] <natrium42> hi
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[19:23] <Laurenceb> hi all
[19:23] <natrium42> hey lb
[19:24] <Laurenceb> I've got mfsk64 doing... something
[19:24] <SpeedEvil> Playing tunes?
[19:24] <Laurenceb> yeah
[19:24] <Laurenceb> seems to be jarbage atm
[19:24] <Laurenceb> its probably endianess somewhere
[19:30] <Laurenceb> http://www.qsl.net/zl1bpu/MFSK/FECcoder.htm
[19:30] <Laurenceb> I'm trying to work out how the shift register indexing works
[19:30] <Laurenceb> is 0 the earliest or latest bit on the register?
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[19:43] <Xenion> Guten Abend folks
[19:43] Action: SpeedEvil ABENDS.
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[19:49] <rjharrison> Evening all
[19:49] <Laurenceb> hi
[19:49] <Laurenceb> ABENDS?
[19:50] <SpeedEvil> http://en.wikipedia.org/wiki/Abnormal_Ending
[19:50] <SpeedEvil> (though /me wasn't old enough)
[19:50] <SpeedEvil> An ABEND (also abnormal end or abend) is an abnormal termination of
[19:50] <SpeedEvil> software, a crash.
[19:50] <SpeedEvil>
[19:50] <SpeedEvil> This usage derives from an error message from the IBM OS/360 operating
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[21:01] <edmoore> jcoxon: yo
[21:01] <rjharrison_> he's very qrt
[21:01] <rjharrison_> how is ed
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[21:02] <edmoore> good
[21:03] <edmoore> hard at work as ever
[21:03] <edmoore> you?
[21:03] <Laurenceb> any upcoming launches?
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[21:03] <edmoore> not this weekend
[21:04] <rjharrison> Ok
[21:04] <rjharrison> Cool
[21:04] <edmoore> there be a spring ball at churchill
[21:04] <rjharrison> Sorry fell out for a second
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[21:10] <Laurenceb> brb
[21:11] <rjharrison> The w/e is out for launching me thinks due to the weather
[21:11] <rjharrison> I'm basically set for the next clear w/e
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[21:35] <Laurenceb> well it sounds nice an modemy
[21:35] <Laurenceb> - mfsk64
[21:36] <Laurenceb> fergusnoble: do you have dominoex working?
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[21:45] <Laurenceb> hey edmoore
[21:45] <edmoore> yo
[21:45] <Laurenceb> did you get dominoex working>
[21:46] <edmoore> yep
[21:46] <Laurenceb> cool
[21:46] <edmoore> not personally
[21:46] <edmoore> but it works
[21:46] <Laurenceb> I'm working on mfsk64 but its a bit of a pain
[21:46] <edmoore> but in a slighly bodgey way
[21:46] <Laurenceb> maybe dominoex is a better idea
[21:46] <edmoore> i think that is a little ambitious and complex
[21:46] <edmoore> and less robust
[21:46] <Laurenceb> mfsk is faster
[21:47] <Laurenceb> and has better performance
[21:47] <edmoore> for sure, but that's the only advantage, and comes with a non trivial list of disadvantages
[21:47] <Laurenceb> with noise and multipath, but needs to be tuned
[21:47] <Laurenceb> yes
[21:47] <Laurenceb> the biggest disadvantage is documentation.. still havent got a clue if I've dont it right
[21:48] <Laurenceb> there looks to be much better dominoex documentation
[21:48] <edmoore> if it decodes in fldigi, it's probably done right
[21:48] <Laurenceb> it doesnt :P
[21:48] <Laurenceb> and theres only about a 1% chance of me getting it right like this
[21:48] <Laurenceb> so many ways to interpret the docs
[21:49] <Laurenceb> sounds nice and is quite fast tho
[21:49] <Laurenceb> ~20% faster than RTTY @ 300 baud
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[21:51] <Laurenceb> guess I might as well write a dominoex encoder while I'm at it to see if the hardware works
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[22:00] <Laurenceb> dominoex looks very simple, just convert to varicode nibbles then add each nibble +2 and take mod 18 to get the tone
[22:00] <Laurenceb> if I understand correctly ?
[22:09] <Laurenceb> or (last_tone-nibble+2)%18 even
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[22:44] <SpeedEvil> Funky! http://www.fibretech.com/products_fibrecore.htm
[22:45] <SpeedEvil> oops, I mean
[22:45] <edmoore> yeah neat stuff
[22:45] <SpeedEvil> actually no - that was the page I meant.
[22:46] <SpeedEvil> Stupid idea.
[22:46] <SpeedEvil> That could have been done in 1900
[22:46] <SpeedEvil> take a tank of molten metal
[22:46] <SpeedEvil> brimming full
[22:46] <SpeedEvil> rotate a grooved cooled roller at the meniscus
[22:46] <SpeedEvil> out shoots metal filliment
[22:46] <SpeedEvil> Now _that's_ what patents are for.
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[23:28] <fergusnoble> edmoore: boo!
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[23:45] <hallam> hey chaps
[23:45] <hallam> you guys hear about the collision?
[23:47] <Laurenceb> hi hallam
[23:47] <Laurenceb> particle collision?
[23:47] <hallam> satellite collision
[23:47] <Laurenceb> e+ + e- ?
[23:47] <Laurenceb> what the...
[23:47] <hallam> operational Iridium commsat vs defunct Russian something or other
[23:47] <Laurenceb> crazy, where?
[23:47] <Laurenceb> wow
[23:47] <hallam> highish LEO
[23:48] <hallam> http://www.satobs.org/seesat/Feb-2009/index.html#end
[23:50] <Laurenceb> http://www.space.com/news/090211-satellite-collision.html
[23:51] <natrium42> whoa
[23:51] <natrium42> it better not impact their service :P
[23:51] <shellevi1> Boom!
[23:52] Action: shellevi1 can't rememer other collisions of actual things.
[23:52] <shellevi1> not things and bits
[23:53] <Laurenceb> hallam: how goes the gps?
[23:53] <hallam> haven't worked on it in a week, been visiting Boston
[23:53] <hallam> shellevi1: do you count Cerise vs upper stage as things or bits?
[23:54] <natrium42> boston massachusetts?
[23:56] <hallam> yes
[23:56] <shellevi1> wasn't that an impact with its own booster?
[23:56] <shellevi1> hallam:
[23:57] <hallam> google says it was an ariane, but not its own
[23:57] <shellevi1> Ah.
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[23:58] <G0WXJ> Anyone about?
[23:58] <shellevi1> I was meaning I seem to recall various collisions with boosters, and debris to satellites - but not hot sat-on-sat action.
[23:59] <hallam> hi G0WXJ
[23:59] <G0WXJ> Evening all
[23:59] <Laurenceb> hello
[23:59] <G0WXJ> my first venture on here, so be gentle
[00:00] --- Thu Feb 12 2009