highaltitude.log.20090822

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[00:31] <Laurenceb> hello
[00:31] <DanielRichman> hi
[00:33] <natrium42> aloha
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[00:50] <Laurenceb> hallam: you know much about supersonic drag?
[00:52] <Laurenceb> is a drag coefficient of 0.3 at mach 9 feasible
[01:40] <Laurenceb> http://www.rocketry.org/software/softwareDetails.php?mainID=344 <- looks useful
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[02:07] <ShellEvil> http://webcache.oslo.dnmi.no/verportal/verportal.map?LAYERS=background%2Ch20.Nedbor_1t%2Cnordic.current%2Ccoastlines&FORMAT=image%2Fpng&EXCEPTIONS=application%2Fvnd.ogc.se_xml&SERVICE=WMS&VERSION=1.1.1&REQUEST=GetMap&STYLES=&SRS=EPSG%3A41000&TIME=2009-08-22T01%3A00&BBOX=0.989192%2C6255.700439%2C1251.931441%2C7506.642689&WIDTH=512&HEIGHT=512
[02:07] <ShellEvil> hmm
[02:08] <ShellEvil> sea currents
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[11:02] <rjharrison_home> hi edmoore
[11:02] <edmoore> morning rjharrison_home
[11:02] <rjharrison_home> Good effort yesterday
[11:03] <rjharrison_home> How hard was it to interface the radio module
[11:03] <edmoore> interface which bit? it's also an 8051 cpu so basically it it was the entire thing
[11:04] <edmoore> it's a tiny wee package
[11:05] <rjharrison_home> cool
[11:05] <rjharrison_home> must dash
[11:05] <rjharrison_home> another time
[11:05] <edmoore> ok
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[11:59] <edmoore> Hi Matt_APEX
[11:59] <edmoore> how's progress?
[12:00] <edmoore> i won't ask about the dreaded 'E' word
[12:00] <Matt_APEX> hey
[12:00] <Matt_APEX> yea not bad
[12:00] <Matt_APEX> e as in exam?
[12:00] <edmoore> maybe
[12:00] <Matt_APEX> i dont mind talking about that :)
[12:01] <edmoore> happy results then?
[12:01] <Matt_APEX> yep, now off to southampton to do electronics :)
[12:02] <Matt_APEX> jon_apex got into selwyn
[12:02] <edmoore> SUCF...
[12:02] <edmoore> oh great, another CUSF recruit
[12:03] <Matt_APEX> tep
[12:03] <edmoore> he obviously has no choice in the matter
[12:03] <Matt_APEX> yep
[12:03] <Matt_APEX> and possibly sucf
[12:03] <edmoore> that'd be awesome
[12:03] <Matt_APEX> there is another member of apex going to soton
[12:03] <edmoore> the JS would take you from SUCF over to us
[12:03] <Matt_APEX> sorry JS?
[12:04] <edmoore> jetstream
[12:04] <Matt_APEX> oh
[12:04] <edmoore> we could provide a pickup service
[12:04] <Matt_APEX> well yea we have more england to land in
[12:05] <Matt_APEX> jon could return them when we see him
[12:05] <Matt_APEX> maybe one day we could land one at your launch site :p
[12:07] <Matt_APEX> anyway apex's pcb design is almost finished
[12:07] <Matt_APEX> some parts for it need ordering
[12:07] <Matt_APEX> and im working on our little program
[12:08] <edmoore> awesome
[12:08] <edmoore> what's the cpu based on?
[12:08] <Matt_APEX> PIC
[12:08] <Matt_APEX> more specifically PICAXE
[12:09] <edmoore> aaaarghh
[12:09] <edmoore> this is an AVR camp :p
[12:09] <russss> heh
[12:10] <Matt_APEX> yea well this is nice and simple :)
[12:11] <Matt_APEX> no point in learning a new micro for a project
[12:11] <edmoore> that's completely true
[12:11] <edmoore> well, am looking forward to listening to it
[12:11] <edmoore> right, it's time for me to get off
[12:11] <edmoore> see you later
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[15:16] <edmoore> jontyw: where is the london hackerspace atm?
[15:36] <edmoore> and or russss
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[16:05] <neontube> afternoon all
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[16:08] <edmoore> hi neontube
[16:09] <neontube> hey edmoore, whats new
[16:09] <edmoore> launched yesterday, taking today easy
[16:10] <neontube> sweet
[16:10] <neontube> launch details?
[16:10] <edmoore> uplink!
[16:10] <edmoore> that's about it. was testing new uplink-capacble board
[16:10] <neontube> what data did you send up ?
[16:11] <edmoore> we managed to get about 170km range out of it, which is plenty, and that's without any forward error correction
[16:11] <edmoore> just ascii strings, which it would then re-boradcast
[16:11] <neontube> handy
[16:12] <neontube> what ground transmitter are you using?
[16:12] <edmoore> eventually it'll be useful commands
[16:12] <edmoore> my ic-7000
[16:13] <neontube> power out?
[16:13] <neontube> (sorry all of this has probs already been chatted about on here)
[16:13] <ShellEvil> edmoore: 170km - was the earth in the way at that point?
[16:13] Nick change: ShellEvil -> SpeedEvil
[16:14] <edmoore> not quite
[16:14] <edmoore> but we did here it over the horizon
[16:15] <edmoore> we heard it at 250km when its horizon distance was 150km
[16:15] <edmoore> Sporadic E
[16:15] <SpeedEvil> have you estimated what that makes the sensitivity at?
[16:15] <SpeedEvil> -?dBm
[16:16] <neontube> been a few years since i did RF stuff at uni, but am i right in remebering that radio horizon is alot further than visual (depending on frquencys etc)
[16:16] <edmoore> no
[16:16] <edmoore> yes - there is some refraction
[16:16] <SpeedEvil> I was assuming you'd get quite a lot off the waves leading to a sort of ducting.
[16:17] <SpeedEvil> under a few MHz it bounces off the ionospher
[16:17] <SpeedEvil> e
[16:18] <SpeedEvil> over that it goes striaght through - but may be refracted due to atmospheric effects - mirages - or diffracted along the ground surface
[16:19] <edmoore> Sporadic E supposedly lets you get some VHF ducting
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[16:26] <neontube> question to all licence holders: Good first radio ?
[16:31] <Matt_APEX> depends how much you want to spend and what you want it to do
[16:32] <Matt_APEX> im guessing ull want SSB in the UHF band for recieving balloon?
[16:32] <Matt_APEX> data
[16:36] <neontube> I've not got my licence yet, doing it over next few weeks, yes the balloon stuff would be good
[16:36] <neontube> And clearly 10w limit for fondation licence
[16:36] <neontube> £200 ish spend limit
[16:42] <Matt_APEX> well most
[16:42] <Matt_APEX> ..
[16:42] <Matt_APEX> most UHF radios are fm only
[16:43] <Matt_APEX> so it would be hard to find a new radio which did SSB on UHF for <£200
[16:43] <Matt_APEX> my brother spent £190 on his handheld VHF/UHF FM radio
[16:44] <Matt_APEX> ft-60
[16:44] <Matt_APEX> good radio tho
[16:44] <Matt_APEX> although only 5W
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[16:48] <edmoore> back
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[00:00] --- Sun Aug 23 2009