highaltitude.log.20060911

[01:00] <HenryH> night gang
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[20:37] <jcoxon> hey rocketboy
[20:37] <rocketboy> hi
[20:37] <jcoxon> i got an email from some guys who are putting together a payload asking about radios etcf
[20:37] <jcoxon> etc*
[20:37] <jcoxon> do you mind if i give them your email address?
[20:38] <rocketboy> no problem
[20:38] <jcoxon> cool
[20:38] <jcoxon> yesterday sounded like it went well
[20:38] <rocketboy> the radio system I made for Laurence worked really well - I estimate it would work over about 300Km
[20:39] <rocketboy> yeah - both Saturday and Sunday were a great sucess
[20:40] <jcoxon> wow
[20:40] <jcoxon> if i wanted to put together a similar radio system how would i go about it?
[20:43] <rocketboy> I'll write somthing up on the Wiki shortly - you can either write the software and make the hardware yourself (but you will need a D2A) - or i could give you a programmed PIC and you could make a copy of the system I have - or I'm thinking of making a kit of bits
[20:45] <jcoxon> oooo well i think the software part would be over my head
[20:45] <jcoxon> however i really don't want to burden you
[20:45] <jcoxon> you've already given me so much help
[20:46] <rocketboy> its no problem - as I see it you guys are helping me out by debuging the system I'm going to be using anyway
[20:47] <rocketboy> It saves me using balloons/helium testing
[20:47] <jcoxon> :-)
[20:47] <jcoxon> thats half the fun!
[20:47] <jcoxon> what are your eventual plans?
[20:47] <rocketboy> yeah - its fun for me too
[20:48] <rocketboy> I'd like to do a Rockoon at some time (that was always the plan)
[20:48] <jcoxon> :-)
[20:48] <jcoxon> well i'm onboard if you want some help
[20:48] <rocketboy> but in the short term I'd just like to do a flight to take some pics.
[20:49] <rocketboy> thanks
[20:49] <jcoxon> i guess my work on stabalisation will help
[20:49] <jcoxon> i've ordered an i2c dig compass
[20:51] <rocketboy> Ah ok - is it like this one - http://www.rapidonline.com/productinfo.aspx?kw=compass&tier1=Electronic+Components&tier2=Sensors+%26+Transducers&tier3=Strain+Gauges&tier4=CMPS03+magnetic+compass&moduleno=60297
[20:51] <jcoxon> thats the one
[20:52] <jcoxon> paid the same price as well
[20:52] <rocketboy> thats reassuring
[20:52] <jcoxon> got it from activerobots i think
[20:52] <rocketboy> I don't think I have seen it cheaper
[20:52] <jcoxon> hopefully it should arrive tomorrow
[20:52] <jcoxon> i'm thinking though that it really needs its own space in the payload
[20:53] <jcoxon> away from the other bits and bobs (magnets etc)
[20:53] <rocketboy> yes - you could even mount it in a stick suspended below the payload
[20:54] <jcoxon> i'm struggling with this payload design
[20:54] <jcoxon> i'm really want an adaptable reusable one
[20:54] <rocketboy> mind you I cant think of any major problems - perhaps the batteries may cause a problem
[20:55] <jcoxon> speakers in the phone i guess
[20:55] <rocketboy> yeah - speakers (remove)
[20:55] <jcoxon> hehe
[20:56] <rocketboy> less weight
[20:56] <jcoxon> this is the thing about hte payload case
[20:56] <rocketboy> remove case, speakers microphone, LCD display keyboard ....
[20:56] <jcoxon> i sort of can't work out whether its worth having a large box to allow more or less to be added
[20:56] <jcoxon> or perhaps a small case
[20:57] <jcoxon> which can have bits added to it
[20:57] <rocketboy> personally I'd go for small - sort of modular - like NOVA
[20:58] <jcoxon> was nova modular?
[20:58] <jcoxon> didn't really get a chance to examine hte payload
[20:58] <jcoxon> was holding the balloon
[20:59] <rocketboy> yes sort of - I had a section to build the transmitter in (they sent it though the post) - and this was then taped on to the rest on Saturday
[20:59] <jcoxon> oh right
[20:59] <rocketboy> the sections slotted together
[21:00] <rocketboy> we just had to make (burn) a hole between the sections to thread the wires through
[21:01] <jcoxon> interesting
[21:02] <rocketboy> hang on I'll send a photo
[21:03] <rocketboy> just emailed one
[21:05] <jcoxon> thanks - i get it
[21:05] <jcoxon> i'll see what i can think of
[21:05] <jcoxon> right i'll bbl
[21:06] <rocketboy> ok
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[22:19] <HenryH> hi all
[22:21] <jcoxon> hey HenryH
[22:21] <jcoxon> nice site
[22:21] <jcoxon> just got hte link that robert sent
[22:21] <jcoxon> phatmonkey, you around?
[22:21] <HenryH> ah cool
[22:21] <HenryH> the .co.uk address is working now
[22:21] <phatmonkey> for a bit
[22:21] <HenryH> www.cuspaceflight.co.uk
[22:22] <HenryH> Carl wanted me to take down the link to the public photo gallery because of some weird publicity reason but you can see all the stuff that's not directly linked from the main site at http://www.cuspacegflight.co.uk/press/
[22:22] <HenryH> ehh
[22:22] <HenryH> http://www.srcf.ucam.org/~hmh33/cuspaceflight/press/
[22:22] <HenryH> I still need to fix that domain
[22:23] <jcoxon> so which link do you need changed?
[22:23] <HenryH> in the wiki?
[22:23] <HenryH> could just have it point at www.cuspaceflight.co.uk
[22:23] <HenryH> we'll link everything from the homepage there
[22:23] <jcoxon> okeydokey
[22:23] <HenryH> cheers
[22:25] <jcoxon> ben can you change it on the actual ukhas site?
[22:26] <phatmonkey> ah yes, ok
[22:26] <phatmonkey> shall i sort out your password?
[22:27] <phatmonkey> hmm
[22:27] <jcoxon> hehe
[22:27] <jcoxon> only if you have time
[22:27] <jcoxon> HenryH, well i'm very impressed
[22:28] <HenryH> the website is nearly all Carl's work
[22:28] <jcoxon> especially with the new projects, meteor and martlet
[22:28] <HenryH> martlet is my baby, meteor is rob's
[22:28] <HenryH> early days yet
[22:28] <phatmonkey> new password emailed to jac208 cam ac uk
[22:28] <jcoxon> thanks
[22:28] <phatmonkey> apparently.....
[22:30] <jcoxon> got it
[22:30] <phatmonkey> great
[22:30] <jcoxon> haha
[22:30] <jcoxon> guess what
[22:30] <jcoxon> my browser still had my old password cached
[22:35] <jcoxon> HenryH, shall i change your comment as well
[22:35] <jcoxon> or perhaps delete it and you can add another
[22:45] <HenryH> ok sure
[22:45] <jcoxon> right i've updated all the links on the wiki and the main site
[22:45] <jcoxon> just do mine and then i'm done
[22:46] <phatmonkey> night all
[22:46] <HenryH> night
[22:46] <jcoxon> night phatmonkey
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[22:51] <jcoxon> brb
[22:52] <jcoxon> back
[23:06] <HenryH> hi Steve
[23:06] <rocketboy> hi henry
[23:07] <rocketboy> I found the NOVA 1 log so I'm jsut running it through the landing spot prediction code
[23:15] <HenryH> that should be interesting
[23:15] <HenryH> what did you write the code in?
[23:17] <jcoxon> http://wiki.ukhas.org.uk/ideas:landing_spot_prediction
[23:18] <jcoxon> ooo laurence has temp graphs up
[23:19] <rocketboy> Henry - at the moment its in excel
[23:20] <HenryH> okay
[23:20] <jcoxon> on laurences temp graphs you can see where it passed through the tropopause
[23:21] <jcoxon> and entered the increasing in temp stratosphere
[23:21] <HenryH> we have been working on website and publicity stuff today but I'll try to write some kind of launch/telemetry analysis program over the next few days
[23:21] <HenryH> cool
[23:24] <HenryH> it would be great to just drop a video camera in foam from 30km
[23:24] <HenryH> Laurence proved it would survive
[23:26] <rocketboy> yeah - a bit like when they crash land a space probe into a planet
[23:28] <HenryH> have you seen one of those powers-of-10 videos?
[23:28] <rocketboy> how much did NOVA1 weigh? and how big was the chute
[23:28] <HenryH> 1150g, 45"
[23:28] <rocketboy> ta
[23:34] <icez> jcoxon, did you ever get temperature data from one of the Pegasuses?
[23:34] <jcoxon> nope
[23:34] <jcoxon> never had a temp sensor
[23:34] <jcoxon> cause i'm useless at electronics
[23:34] <rocketboy> henry - predicted landing spot:- http://www.streetmap.co.uk/newmap.srf?x=587760&y=271903&z=4&sv=587760,271903&st=4&ar=Y&mapp=newmap.srf&searchp=newsearch.srf&ax=587760&ay=271903
[23:34] <icez> ohh
[23:35] <jcoxon> though with the creation of this 555 timer i reckon i'm on my way to becoming a circuit wizard
[23:35] <rocketboy> from apogee data
[23:35] <HenryH> hehe
[23:35] <HenryH> that's pretty impressive Steve
[23:35] <HenryH> where was it at apogee?
[23:35] <icez> jcoxon, a friend once told me: if you can make a LED flash, you can do anything :)
[23:36] <jcoxon> rocketboy, pretty damn good
[23:36] <jcoxon> icez, well there you go
[23:36] <icez> well i did once make a LED flash, but in the process i burned 3 LEDs and 1 microprocessor
[23:36] <icez> :\
[23:37] <HenryH> :D
[23:37] <rocketboy> hang on - your right henry - I didn't quite use the right apogee - let me re-calculate
[23:37] <HenryH> also that map is crazy, there's no water near the landing site
[23:37] <HenryH> but the position is very close
[23:37] <jcoxon> HenryH, yes there was
[23:38] <jcoxon> saw it when we were in the village just before we stopped
[23:38] <HenryH> oh right yes I can see it now on google earth
[23:38] <HenryH> good job it missed the lake
[23:38] <jcoxon> hehe
[23:38] <jcoxon> i had string to fish it out
[23:39] <HenryH> when I have the next gen tracker working really well I'll pot it in epoxy so it's waterproof
[23:40] <rocketboy> nah - it woun't make much difference - my prediction stands - apogee at 15:13:00 52.261032 0.606521 32255.3
[23:40] <HenryH> worth doing when it costs about £100 for the parts
[23:40] <jcoxon> i thought we weren't meant to talk about epoxy
[23:40] <HenryH> heh
[23:41] <jcoxon> rocketboy, i'm still impressed
[23:41] <HenryH> landing site was 12km from apogee
[23:41] <rocketboy> good huh
[23:41] <HenryH> definitely
[23:41] <HenryH> that's easily good enough for danger zone / sea avoidance purposes
[23:42] <HenryH> can it get even better if you include data from the descent up to loss of signal at ~3km?
[23:42] <rocketboy> you do need to accuratly profile the parachute drag
[23:42] <HenryH> right
[23:42] <HenryH> well we have the data to do that now
[23:42] <jcoxon> rocketboy, i guess the more launches we do the better that data will be
[23:42] <HenryH> brb
[23:44] <rocketboy> yeah - that relativly easy to add
[23:45] <rocketboy> yes - to get the best results the same parachute/box size combination needs to be re-flown
[23:46] <rocketboy> need to get data on the combined parachute/box drag
[23:47] <rocketboy> I gotta go now - talk to u alls tomorrow
[23:47] <HenryH> ok cheers steve
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[23:55] <jcoxon> hey rikstah
[23:55] <rikstah> hey
[23:56] <HenryH> hi
[00:00] --- Tue Sep 12 2006