highaltitude.log.20120716

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[06:46] <UpuWork> morning
[06:47] <jcoxon> morning
[06:47] <UpuWork> H&S say no ?
[06:48] <jcoxon> sadly so
[06:48] <UpuWork> damn
[06:48] <UpuWork> ok I'll have to do a video or something
[06:48] <jcoxon> its sort of unsuprising
[06:48] <UpuWork> well we have a school work experience person here
[06:48] <jcoxon> do everything apart from turning it on?
[06:49] <UpuWork> and they only thing they baulked at him doing was soldering
[06:49] <UpuWork> well not carrying it through london if we aren't using it but I'll come up with something
[06:50] <jcoxon> just updated the wiki a bit more
[06:50] <UpuWork> yeah it was a quick cut and paste job
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[07:04] <daveake> Morning all
[07:04] <daveake> Recovery of PIE1/uAVA and BUZZ8 - http://youtu.be/Ui_wejYGVu0
[07:05] <UpuWork> nice didn't realise we were being recorded :)
[07:06] <daveake> lol
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[07:06] <UpuWork> that parachute is ace been wanting to use that for ages
[07:08] <UpuWork> ceremonial sniffing of the latex
[07:09] <daveake> :D
[07:10] <UpuWork> inflation video looks windy
[07:12] <daveake> Wasn't too bad - most of my recent ones have been a bit more gusty
[07:12] <daveake> Good job I don't have a video of the pAVA recovery ...
[07:12] <Darkside> why aren't you on hackaday yet :P
[07:13] <daveake> Because I haven't finished the write-up :)
[07:14] <Darkside> :P
[07:14] <Darkside> we still need to do writeups for horus 24, 25, 26 and 27
[07:14] <daveake> lol
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[07:18] <number10> what do you mean instead of doing what number 10 said daveake
[07:19] <number10> I just plugged the numbers into the predictor as you asked ;)
[07:19] <daveake> ah lol
[07:19] <daveake> No it was just the predictor sent us up a junction instead of staying where we were!
[07:20] <number10> :)
[07:20] <UpuWork> hahaha
[07:20] <daveake> It seemed wrong to us, but who are we to argue with a predictor? :)
[07:20] <daveake> I think I'll have a go at having the payload do its own prediction
[07:21] <daveake> Then I can get my car program to pick that up and do a route for us
[07:22] <number10> I dunno - pleading on the channel for a prediction then blame the messenger ;)
[07:22] <daveake> lol
[07:22] <daveake> Exactly!
[07:22] <number10> lol
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[08:47] <griffonbot> @AnthonyStirk: Write up on this weekends successful launches here : http://t.co/0jbNJicP #ukhas [http://twitter.com/AnthonyStirk/status/224787407759872000]
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[09:06] <MrScienceMan> could anyone suggest a portable APRS tracker? Some other than what byonics has
[09:09] <oh7lzb> opentrackers are open
[09:09] <oh7lzb> argentdata.com
[09:14] <Darkside> bloody expensive
[09:19] <MrScienceMan> 80$ and it needs to be connected to a radio
[09:20] <craag> Darkside: I've been meaning to ask you, have you published your micronut designs?
[09:20] <Darkside> nope
[09:20] <oh7lzb> https://www.argentdata.com/catalog/product_info.php?cPath=22&products_id=148 - $40
[09:20] <oh7lzb> got one of those, works
[09:21] <Darkside> no radio, no battery, etc
[09:21] <Darkside> no gps
[09:21] <oh7lzb> no, just the tracker
[09:21] <Darkside> no, just the APRS modulator
[09:22] <oh7lzb> and demodulator :)
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[09:25] <navrac_> well 1 day of decent weather - back to solid rain again
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[09:36] <MrScienceMan> http://rpc-electronics.com/rtrak-hab.php
[09:36] <MrScienceMan> somebody made a complete package
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[09:40] <nosebleedkt> Ok guys, this thursday is the day !
[09:41] <MrScienceMan> \o/
[09:41] <nosebleedkt> CAA can't get me a NOTAM because there is no law. So I can just fly it.
[09:41] <UpuWork> how much ?
[09:41] <nosebleedkt> No restrictions
[09:41] <UpuWork> wow
[09:41] <costyn> nosebleedkt: nice :)
[09:42] <UpuWork> good luck nosebleedkt
[09:42] <kokey> I dreamt last night that I did a launch and only realised afterwards that I didn't have a notam
[09:42] <nosebleedkt> lol
[09:42] <nosebleedkt> well, if anyone got a radio receiver at 144.8mhz
[09:42] <nosebleedkt> i would like to know if you caught mt signal
[09:42] <nosebleedkt> my*
[09:43] <costyn> nosebleedkt: what power are you using? are we going to be ableto hear it here in western europe? :)
[09:43] <kokey> I wonder if you could just bend some of the coils on a old transistor FM set to get it to tune up to 144.8mhz
[09:43] <nosebleedkt> costyn: 300mw
[09:43] <nosebleedkt> :)
[09:43] <costyn> thatis quite a lot hehe
[09:43] <kokey> megawatts, nice
[09:43] <nosebleedkt> i know, but for first i want to use that
[09:44] <nosebleedkt> costyn, still in africa?
[09:44] <costyn> nosebleedkt: no Netherlands, I moved from Kenya in 1997
[09:44] <nosebleedkt> lol, who the hell is in africa then?
[09:44] <nosebleedkt> someguy here
[09:45] <costyn> nosebleedkt: samsilver
[09:45] <nosebleedkt> ah yea
[09:45] <nosebleedkt> sorry
[09:45] <nosebleedkt> i consfuse you
[09:45] <kokey> nosebleedkt: I know hundreds of people in South Africa, which is probably of no use to you
[09:45] <nosebleedkt> costyn: got receiver at 144.8mhz?
[09:45] <LazyLeopard> costyn: You were in Kenya? Why? ;)
[09:45] <costyn> nosebleedkt: I have a FT817, it should receive 144 yes
[09:45] Action: LazyLeopard was born there...
[09:46] <costyn> LazyLeopard: my dad had his work there. I lived there from 1980 to 1997
[09:46] <costyn> LazyLeopard: did you live there too?
[09:46] <nosebleedkt> costyn: If you want try to listen, I would like to know how far it got
[09:46] <costyn> nosebleedkt: well I can't right now, I'm at work unfortunately
[09:46] <nosebleedkt> not know
[09:46] <nosebleedkt> now*
[09:46] <nosebleedkt> on thursday
[09:46] <nosebleedkt> :)
[09:46] <costyn> nosebleedkt: i can have a listen later today if you want, but maybe the people with proper antenna's are better to ask
[09:46] <LazyLeopard> Yep. On the edge of the game park a short way down the Magadi road...
[09:47] <costyn> LazyLeopard: cool
[09:47] <costyn> LazyLeopard: when?
[09:47] <LazyLeopard> My mother and brother (+ family) are still there.
[09:47] <LazyLeopard> We moved there in 1966
[09:47] <costyn> LazyLeopard: how old are you?
[09:47] <LazyLeopard> Before that we were out to the north of Nairobi.
[09:48] <costyn> I'm wondering if we've ever met :)
[09:48] <costyn> the muzungu population is not that big in Nairobi
[09:48] Action: LazyLeopard can remember the Apollo 1 fire.
[09:48] <costyn> okay :)
[09:49] <LazyLeopard> You were at school out there?
[09:49] <costyn> LazyLeopard: yea intl school
[09:49] Action: LazyLeopard left uni in 1980
[09:49] <LazyLeopard> Right. My sister taught at Hillcrest for a while.
[09:49] <costyn> ah ok
[09:50] <LazyLeopard> What was your dad working on?
[09:50] <LazyLeopard> (Possibly ought to go to PM with this...)
[09:50] <costyn> yea lets
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[10:08] <navrac_> ping upu
[10:08] <UpuWork> hi navrac
[10:08] <navrac_> hiya
[10:08] <UpuWork> morning
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[10:25] <sergata> Hello, high altitude society :)
[10:26] <nick_> hi
[10:26] <sergata> I have asked you for assistance before on a project that we are developing here in Bulgaria and now I once again need a little help
[10:26] <sergata> https://www.facebook.com/PhoenixSat
[10:27] <sergata> we are launching a helium balloon with a HD camera and a microcontroler on board carrying out a little experiment
[10:27] <sergata> but still have no communicational module
[10:27] <nick_> What experiment?
[10:27] <Darkside> sergata: when are you planning on launching
[10:27] <sergata> measurement of temperature, accelaration
[10:28] <sergata> the purpose is mostly to learn how to do it
[10:28] <Darkside> well, the most common transmit system used by UKHAS launches is RTTY, with the NTX2
[10:28] <sergata> well intentionally we were planing for 29.07 but the person responsible for the communication bailed, so now we need to find another way
[10:29] <Darkside> what radio receivers do you have
[10:29] <sergata> well we plan to use APRS radio
[10:29] <sergata> and basicly what I need assistance for is "what parts to buy"
[10:29] <Darkside> that doesn't tell me anything
[10:29] <Darkside> what radio are you using to receive
[10:30] <sergata> we have nothing for now
[10:30] <Darkside> then you'll need something
[10:30] <sergata> what would you recomend us?
[10:31] <Darkside> i suggest you get hold of some kind of radio scanner that can support USB/LSB modes on 434MHz
[10:31] <Darkside> that will let you use the NTX2 radio module for transmit
[10:31] <Darkside> its also very reliable
[10:31] <Darkside> will also get your balloon plotted on spacenear.us/tracker/
[10:33] <Darkside> i use an Icom IC-R10, but they aren't made any more
[10:33] <Darkside> there are other options
[10:34] <sergata> well having in mind that we have nly a little experience, we need something like "almost ready to use" system
[10:34] <Darkside> ugh
[10:34] <Darkside> ok
[10:34] <Darkside> is there an APRS network in your country
[10:35] <Darkside> and do you have people with amateur radio licenses
[10:35] <Darkside> because you can get an all-in-one APRS tracker for a few hundred dollars that would work
[10:35] <sergata> trying to get ahold of a person that has experience with APRS
[10:35] <kokey> sergata: which country?
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[10:36] <Darkside> bulgaria kokey
[10:36] <sergata> but we'd like to make a decision before that
[10:36] <kokey> oh, bulgaria
[10:36] <sergata> Bulgaria
[10:36] <sergata> and yes, there is an APRS network
[10:36] <kokey> I still think the ntx2 or rfm option and using the ISM band will do good for you in bulgaria
[10:37] <kokey> mainly because it's quite a tried and tested way, at least around the UK
[10:37] <sergata> ok, I'll start researching it
[10:37] <Darkside> the ukhas wiki has a lot on it
[10:37] <sergata> let me ask you this, and sorry for the dul question, but what kind of equipment do we need exactly
[10:37] <kokey> and to get more people set up to receive it is fairly easy
[10:38] <sergata> an anthena, receiver, trasmitter and ... ?
[10:38] <Darkside> sergata: and a lot of coding
[10:38] <Darkside> and practice
[10:38] <Darkside> and testing
[10:39] <kokey> http://ukhas.org.uk/guides:radio_modules and http://ukhas.org.uk/communication:protocol and even this... http://ukhas.org.uk/guides:sdr_tracker
[10:39] <Darkside> do NOT rely on the SDR tracker
[10:39] <Darkside> we don't know its performance yet
[10:40] <kokey> sdr tracker is only ok for testing I'm sure
[10:40] <Darkside> yes
[10:40] <kokey> as in, in the house, without a scanner
[10:40] <kokey> at least that's what I was thinking of using it for
[10:41] <kokey> once I've gotten around the problem of Upu's rfm22 breakout board being as wide as my breadboard, hehe
[10:42] <UpuWork> yeah I do need to look at that
[10:44] <kokey> I think I can probably get around with just sticking the wires in first, and then plugging in the module
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[10:49] Action: kokey is looking at how daveake solders his stuff together
[10:49] <daveake> oh
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[10:49] <sergata> very thankful for the tips guys, I'll do some researching to make questions more adequate
[10:49] <kokey> ok I better get a proper soldering iron the one I have is junk
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[10:51] <kokey> just soldering some pins on my pro mini felt like soldering RS232 cables into plugs with the wrong solder
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[10:54] <joph> get weller :D
[10:55] <kokey> actually, I had a small bottom of the range weller with a little temp adjuster before and it worked loads better than other soldering irons
[10:55] <kokey> but that said, I might just go for a hakko fx-888
[10:55] <Darkside> YES
[10:56] <Darkside> do that
[10:56] <Darkside> i love mine
[10:56] <kokey> Darkside: what makes it extra good?
[10:57] <Darkside> uhm
[10:57] <Darkside> its a hakko
[10:57] <Darkside> nuff said
[10:57] <Darkside> :P
[10:58] <kokey> hehe
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[11:47] <nick_> I got the ublox spewing data at me :)
[11:48] <nick_> Is there a simple message I can use to tell it to stop spewing?
[11:48] <daveake> http://ukhas.org.uk/guides:falcom_fsa03
[11:50] <nick_> Ah, so I need to send it a bunch of messages?
[11:51] <daveake> Dunno if there's a "shut up stop sending me NMEA please" message
[11:51] <nick_> The protocol spec is fairly epic
[11:52] <Darkside> there is daveake
[11:52] <Darkside> hold
[11:52] <Darkside> Serial.println(F("$PUBX,40,GLL,0,0,0,0*5C"));
[11:52] <Darkside> Serial.println(F("$PUBX,40,ZDA,0,0,0,0*44"));
[11:52] <Darkside> Serial.println(F("$PUBX,40,GSV,0,0,0,0*59"));
[11:52] <Darkside> Serial.println(F("$PUBX,40,GSA,0,0,0,0*4E"));
[11:52] <Darkside> Serial.println(F("$PUBX,40,RMC,0,0,0,0*47"));
[11:52] <Darkside> Serial.println(F("$PUBX,40,GGA,0,0,0,0*5A"));
[11:53] <Darkside> Serial.println(F("$PUBX,40,VTG,0,0,0,0*5E"));
[11:53] <Darkside> whoops
[11:53] <UpuWork> lol
[11:53] <UpuWork> nick http://ava.upuaut.net/store/wiki/doku.php?id=levelconvertor
[11:53] <UpuWork> thx for beer was very nice
[11:54] <nick_> Cool
[11:54] <nick_> So basically to set it up to be quiet I need to send it "B56206...."
[11:54] <nick_> ?
[11:55] <UpuWork> basically what Darkside said
[11:55] <nick_> The setNav data that overflows my screen.
[11:57] <UpuWork> get your code to issue it
[11:58] <nick_> So if I send it the commands Darkside gives it will be quiet then I can send it $PUBX,00*33" to poll for a standard string with the info I probably want?
[11:59] <Darkside> yup
[11:59] <Darkside> the PUBX string contains all the info you need
[11:59] <Darkside> the response, i mean
[12:01] <nick_> Hmm
[12:01] <nick_> I send those commands but it's still spewing out stiff
[12:01] <nick_> Is there an acknowledge message it will send back?
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[12:02] <Darkside> not sure
[12:03] <UpuWork> if you use the code here : http://ava.upuaut.net/store/wiki/doku.php?id=levelconvertor
[12:03] <UpuWork> ç// THE FOLLOWING COMMANDS DO WHAT THE $PUBX ONES DO BUT WITH CONFIRMATION
[12:03] <nick_> I'm not using an arduino
[12:03] <UpuWork> doesn't matter sure you can convert the code to what your using
[12:05] <nick_> Ah, stupid c+ped type
[12:05] <nick_> typo
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[12:15] <WillDuckworth> nick_ how's the beard?
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[12:33] <nick_> Same as ever
[12:33] <nick_> Maybe sligtly longer than yesterday
[12:33] <fsphil> more experienced
[12:33] <UpuWork> someone did comment on the video chat, "with a beard like that you know you're in safe hands"
[12:35] <WillDuckworth> i chuckled at that - good skills :)
[12:37] <WillDuckworth> has the pi launch been picked up anywhere on the interwebs yet?
[12:38] <daveake> Just finishing the blog now :)
[12:38] <Darkside> then submit it to hackaday awap
[12:38] <Darkside> asap
[12:38] <daveake> And yes I have added caching software to the Wordpress installation
[12:38] <daveake> asap?
[12:38] <Darkside> as soon as possible
[12:38] <daveake> yes, but why asap?
[12:38] <Darkside> before someone else launches ap i :P
[12:38] <daveake> Before you go to bed?
[12:38] <Darkside> you never know what those US people are doing
[12:38] <daveake> lol
[12:38] <daveake> yeah
[12:39] <daveake> Nearly done
[12:39] <Darkside> GO GO GO GO GO GO GO GO GO
[12:39] <WillDuckworth> do it
[12:41] Action: fsphil has made the live page not-live :)
[12:41] <daveake> lol
[12:41] <kokey> live page?
[12:42] <daveake> I was going to link to my flickr set actually, to save your server from overheating again :)
[12:42] <fsphil> http://www.sanslogic.co.uk/ssdv/live
[12:42] <fsphil> that'll do nicely
[12:42] <Darkside> so what power supply were you using for the pi?
[12:42] <fsphil> as I'm still not sure what melted it
[12:42] <fsphil> brb, lunch!
[12:43] <daveake> The wrong one
[12:43] <kokey> an SMD thorium reactor
[12:43] <daveake> Just a 5V LDO
[12:43] <Darkside> oh dear
[12:43] <daveake> And 6 AA energizers
[12:43] <Darkside> OH DEAR
[12:43] <daveake> Yeah, it got hot
[12:43] <Darkside> yeah
[12:43] <Darkside> no shit
[12:43] <Darkside> hahah
[12:43] <daveake> The switched mode ones I ordered didn't arrive
[12:43] <Darkside> oh god
[12:43] <Darkside> that woudl have got VERY hot
[12:44] <daveake> It partly melted some of the insternal insulation
[12:44] <Darkside> don't need to worry about cold temperatures when you have that in the box
[12:44] <Darkside> hah
[12:44] <Darkside> fly one with a switchmdoe and see if it fails
[12:44] <daveake> And it had an aura of "she's gonna blow!"
[12:44] <daveake> I used 10mm thick EPX 'cos I knew it didn't need much insulation
[12:44] <BrainDamage> can't you simulate the atmosphere with a vacuum pump?
[12:45] <daveake> It was over an hour after landing before I opened it, which didn't help
[12:45] <Darkside> was there a temp sensor in there?
[12:45] <daveake> ^^ It got hot in normal atmosphere
[12:45] <daveake> No
[12:45] <kokey> BrainDamage: hmmm, that's an idea, for testing pico battery configurations
[12:45] <daveake> Will do next time
[12:45] <nick_> OK, so I've got some of the messages to stop
[12:46] <nick_> UpuWork: where do I find the codes to send to stop various messages?
[12:46] <kokey> sounds like a ublox
[12:47] <BrainDamage> I'm thinking something like a big plastic box, like those portable insulated storage boxes for camping,glueing in a tube hose, and a pump, perhaps even manual, you should be able to get down to 10^3Pa or so
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[12:56] <nick_> OK, so I think I've found the releavent part of the ublox docs
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[13:09] <daveake> Here you go ... http://www.daveakerman.com/?p=592
[13:13] <WillDuckworth> good stuff :)
[13:14] <daveake> Let me know about any typos, missing stuff etc etc
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[13:15] <Darkside> the operating system is busy take a photo from the webcam.
[13:16] <daveake> ta. fixed
[13:16] <daveake> Done the hackaday thing
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[13:21] <number10> daveake: if the operating system is busy take a photo from the webcam
[13:21] <fsphil> same line, is busy takinge a photo
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[13:21] <daveake> damn :)
[13:21] <daveake> fixed :) (again!)
[13:21] <number10> ops sorry didnt see Darkside already pointed it
[13:21] <daveake> :D
[13:23] <fsphil> see this is why I don't have a blog. This would be "Flight successful, here's the pics" if I'd wrote it :)
[13:23] <daveake> Tempting - that took way too much effort!
[13:25] <nick_> OK, spew stopped
[13:26] <fsphil> I like that there's a pie chart
[13:27] <WillDuckworth> :D
[13:29] <daveake> :)
[13:29] <daveake> Now you know why I asked for the data :)
[13:31] <daveake> Have pie can make pie chart
[13:32] <number10> daveake: Here are am emerging, successful,
[13:32] <daveake> ta
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[13:33] <number10> nice to see you didnt slag me off in the article - only on youtube ;)
[13:33] <UpuWork> lol
[13:33] <UpuWork> great write up
[13:34] <UpuWork> you know it was sunny all day in Yorkshire as well
[13:34] <number10> was good
[13:34] <daveake> number10 lol
[13:34] <number10> :D
[13:34] <daveake> Not your fault, despite how itmay have sounded :)
[13:35] <number10> I know!
[13:35] <daveake> Fixed. Also added an extra pic
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[13:38] <daveake> And added a link to your write-up UpuWork ...
[13:38] <griffonbot> @AnthonyStirk: Raspberry Pi at the edge of space : http://t.co/AnWiC9eX @raspberry_pi #ukhas Dave's excellent write up of the days proceedings [http://twitter.com/AnthonyStirk/status/224860633466802178]
[13:39] <UpuWork> and vice versa
[13:39] <griffonbot> @darksidelemm: RT @AnthonyStirk: Raspberry Pi at the edge of space : http://t.co/AnWiC9eX @raspberry_pi #ukhas Dave's excellent write up of the days pr ... [http://twitter.com/darksidelemm/status/224860701074784257]
[13:39] <UpuWork> now if they retweet that
[13:39] <UpuWork> you're going to get alot of hits
[13:39] <UpuWork> and yes I know its not the edge of space
[13:39] <UpuWork> don't hate me
[13:39] <daveake> lol
[13:39] <UpuWork> I doing social media bullshit and lying is all part of it
[13:40] <daveake> :)
[13:40] <Randomskk> lying is what social media is all about
[13:42] <fsphil> antisocial media
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[13:46] <Upu> how much bandwidth do you get on your site package Dave ?
[13:46] <griffonbot> Received email: David Akerman "Re: [UKHAS] Launches this Sat 14/07/2012"
[13:46] <daveake> Well, it died last time but I have installed Total Cache since then
[13:49] <UpuWork> see how it goes
[13:52] <craag> Have you got any tracking installed on it?
[13:52] <griffonbot> @kokey: RT @AnthonyStirk: Raspberry Pi at the edge of space : http://t.co/AnWiC9eX @raspberry_pi #ukhas Dave's excellent write up of the days pr ... [http://twitter.com/kokey/status/224864153981042689]
[13:53] <craag> If you use google analytics realtime, you'll know very quickly if it gets retweeted ;)
[13:53] <daveake> :)
[13:53] <nick_> Are we trying to crash daveake's server?
[13:53] <daveake> Yeah the server has Webalizer on it
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[13:56] <daveake> Just going through some of the stats screens seeing where they are right now :)
[13:57] <craag> Ok, if you have any issues with BW I've got a VPS with nginx/php and 800GB of bandwidth left this month.
[13:57] <nick_> OK, lets see if the g+ gang can help too
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[14:23] <daveake> email back from hackaday - should be in tomorrow
[14:26] <griffonbot> @thecraag: RT @AnthonyStirk: Raspberry Pi at the edge of space : http://t.co/AnWiC9eX @raspberry_pi #ukhas Dave's excellent write up of the days pr ... [http://twitter.com/thecraag/status/224872663863136256]
[14:32] <WillDuckworth> nick_ what's your g+ ?
[14:33] <kokey> daveake: cool :)
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[14:35] <WillDuckworth> got ya nick + re posted
[14:35] <griffonbot> @willduckworth: RT @AnthonyStirk: Raspberry Pi at the edge of space : http://t.co/AnWiC9eX @raspberry_pi #ukhas Dave's excellent write up of the days pr ... [http://twitter.com/willduckworth/status/224875017672982528]
[14:40] <griffonbot> Received email: Anthony Stirk "[UKHAS] ARHAB Altitude Records"
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[14:43] <hitman_> daveake: thts amazing
[14:46] <UpuWork> hey Hitesh I sent you a mail
[14:52] <griffonbot> @daveake: RT @AnthonyStirk: Write up on this weekends successful launches here : http://t.co/0jbNJicP #ukhas [http://twitter.com/daveake/status/224879089935319040]
[14:52] <griffonbot> @daveake: RT @AnthonyStirk: Raspberry Pi at the edge of space : http://t.co/AnWiC9eX @raspberry_pi #ukhas Dave's excellent write up of the days pr ... [http://twitter.com/daveake/status/224879111586316288]
[14:54] <nick_> WillDuckworth: I'm Nick Ryder
[14:54] <nick_> My picture has a beard....
[14:55] <nick_> https://plus.google.com/ripple/details?url=http%3A%2F%2Fwww.daveakerman.com%2F%3Fp%3D592&context=z134zx1yoznic5src04cjzahfqjnybiitic
[14:55] <nick_> Can people see that?
[14:55] <daveake> yup
[14:56] <nick_> Anyone know who Deb Johnson is?
[14:57] <WillDuckworth> i saw the beard and knew it was you
[14:58] <nick_> I should put a real photo on there
[14:58] <UpuWork> thats not a real photo ?
[15:00] <nick_> My logo photo is an "artist"'s impression
[15:00] <daveake> For your first flight, get it to send down artist's impressions of what it sees :)
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[15:01] <fsphil> fly that descriptive camera someone developed
[15:01] <fsphil> although that needs internet access :)
[15:01] <daveake> "It's dark up here. And cold"
[15:02] <daveake> "Oh, I see a plane"
[15:02] <nick_> "It's cold but I'm melting"
[15:02] <nick_> "HELP! Aliens!
[15:02] <daveake> Too accurate
[15:02] <nick_> "
[15:02] <fsphil> "That's a moon"
[15:02] <daveake> That's NOT a moon
[15:03] <fsphil> I did mistake the moon for a piece of latex in that burst video
[15:03] <UpuWork> lol
[15:03] <UpuWork> yes
[15:03] <daveake> lol
[15:03] <daveake> So did I first time
[15:03] <UpuWork> "theres something following the payload down"
[15:03] <UpuWork> "its the moon Phil"
[15:03] <daveake> LOL
[15:03] <nick_> I'm a fool, I should have actually included the Raspberry Pi page in the post
[15:06] <WillDuckworth> maybe some tags - dunno how you do that in g+ - same as twitter?
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[15:07] <craag> I think it is the same.
[15:07] <nick_> YOu can tag with #x
[15:07] <nick_> Or metion people with +x
[15:10] <WillDuckworth> got someone who is followed on g+ by raspberry pi to repost
[15:10] <daveake> :)
[15:11] <nick_> Are there any other HAB people on g+?
[15:11] <nick_> WillDuckworth's currently lonely in my HAB circle..
[15:11] <WillDuckworth> :D
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[15:11] <Darkside> nick_: i'm on g+
[15:11] <Darkside> Mark Jessp
[15:11] <Darkside> Mark Jessop *
[15:12] <UpuWork> My foray in to Twitter is the nearest I get
[15:12] <nick_> Darkside: any distinguishing features?
[15:13] <nick_> Or could you send me a link to your profile?
[15:14] <daveake> There, I've added you :)
[15:14] <daveake> not that I actually use g+
[15:16] <nick_> g+ is neat if you know how to use it.
[15:17] <nick_> Think of it like an awesome version of IRC, not a lonely version of Facebook.
[15:17] <daveake> lol :)
[15:18] <nick_> Meaning that it's not the way to hear inane stuff from your friends, it's a way to hear interesting stuff from people you share interests with.
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[15:20] <daveake> Nice blog comment ... "This is truly very inspiring, and definitely my favourite Raspberry Pi project to date.
[15:20] <daveake> Many many thanks sharing :-)"
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[15:20] <Darkside> lol
[15:20] <daveake> Guess the others were shit then :)
[15:21] <daveake> Oh and now he's following me on twitter
[15:21] <daveake> Something else I don't really use
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[15:26] <kokey> most people use Raspberry Pi devices as, well, PCs
[15:27] <daveake> Yeah. mine has only seen a monitor (well, the TV) once and that was to watch it boot the first time
[15:28] <craag> I had to borrow a TV to enable the SSH server..
[15:28] <daveake> Which distro?
[15:29] <craag> one of the early archlinux builds.
[15:29] <daveake> Ah
[15:29] <daveake> On Debian you can just rename a file in the FAT partition
[15:29] <craag> They all have it by default now
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[15:30] <craag> Yeah, I've had to start backing up network configs though, as I'm trying to get it to use a 3G dongle for network, and when I fail it's inaccessible!
[15:30] <daveake> lol
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[15:30] <craag> Put SD card back in laptop, change network config, put it back in pi and repeat :)
[15:30] <daveake> Plug a USB-TTL adapter into the serial port
[15:31] <craag> I've got a MAX-6 sitting on the uart atm :P
[15:31] <daveake> OK, you've comprehensively shot yourself in the foot then :p
[15:31] <craag> Yep!
[15:31] <daveake> Or ....
[15:31] <craag> Got hold of a Composite video => usb adaptor over the weekend though.
[15:32] <daveake> ... a USB-serial adapter into the USB port?
[15:32] <craag> Should make things a lot easier from now on!
[15:33] <craag> That would work.. hopefully I won't need it once I have 3G + dyndns set up.
[15:34] <UpuWork> getting some nice comments on there daveake
[15:35] <daveake> yep
[15:35] <daveake> "Thanks for showing us everything" ... well, aside from it melting, for example :)
[15:36] <craag> Btw, what FEC/ratio did you use with the Pi-TV?
[15:36] <daveake> I phoned a friend
[15:36] <daveake> ping fsphil
[15:36] <UpuWork> lol
[15:36] <craag> It came through really well even on an rtl-sdr and 70cm dipole.
[15:36] <UpuWork> its documented on the Wiki
[15:36] <craag> Ah ok, I'll check it out, cheers.
[15:36] <fsphil> Reed Solomon codes
[15:37] <fsphil> 32 bytes at the end of each packet, can correct up to 16 byte errors
[15:39] <craag> It worked really well at coping with QRM bursts.
[15:39] <craag> Packets still came through 100%
[15:40] <kokey> what software to receive with?
[15:40] <daveake> I was really pleased with the near zero packet loss
[15:40] <craag> sdr# piped through 'stereo mix' into dl-fldigi
[15:40] <fsphil> in the end most of the packet loss was due to the server turning to goo
[15:40] <daveake> I think aside from when it was down, and when the server melted, it was 100%
[15:42] <fsphil> the server will be going on a diet soon, should fix that problem
[15:43] <daveake> I might do SSDV again next launch, planned for the 28th
[15:44] <fsphil> would you make any changes?
[15:45] <daveake> This time, only to leave the images on the SD card
[15:46] <daveake> A better image-choosing algoirithm sometime
[15:46] <daveake> Perhaps some tweaks like when it starts to ascend, take a picture ~200m up and send that immediately
[15:46] <fsphil> it did better at choosing them than I expected-- I though it would be all cloud
[15:47] <daveake> Yes it did
[15:47] <daveake> Though it did seem to like ones with lots of cloud and not too much black sky
[15:47] <daveake> But not as much as I thought
[15:50] <kokey> oh, fldigi does sstv?
[15:51] <fsphil> sadly no
[15:51] <kokey> I mean ssdv
[15:52] <fsphil> not fldigi upstream, only the hab version dl-fldigi
[15:52] <kokey> ah ok, so dl-fldigi does it?
[15:53] <fsphil> yea
[15:59] <daveake> http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=10552 ... see the last 3 posts :)
[16:00] <WillDuckworth> daveake - have you seen timz method? http://www.timzaman.com/?p=1310&lang=en
[16:00] <craag> Hmm, sounds like you might need some more server BW!
[16:00] <craag> Congrats!!
[16:00] <daveake> lol
[16:01] <daveake> WillDuckworth No - but I'll take a look. nick_ suggested some software that could be "taught" to rate images on how they compare to some sample good and bad ones
[16:02] <WillDuckworth> it seems quite good - did a test run on my original wdhab photos and it did pic the better ones
[16:02] <daveake> Yes, looks good from that
[16:03] <WillDuckworth> though to be fair - your run of photos didn't really have any blurry ones or with too much whiteout
[16:03] <daveake> No, they were good. Of course I don't know how bad the rejected ones were!
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[16:47] Action: nick_ can't seem to find any satelites
[16:47] <nick_> :(
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[17:10] <nick_> Although it must have seen some at some point given that the time was correct...
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[17:50] <nick_> UpuWork: my supervisor liked your videos
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[17:57] <fsphil> oooh, conference is go
[17:59] <nick_> GPS is now hanging out the window
[17:59] <fsphil> don't let it jump!
[18:01] <nick_> It looks happy
[18:01] <nick_> I'm more worried about the birds flying around getting curious about the flashing LEDs
[18:05] <nick_> If the weather was better I'd go sit on the roof with it.
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[18:08] <fsphil> what type of module is it?
[18:10] <nick_> ublox
[18:10] <nick_> with a sarantel antenna
[18:10] <nick_> Maybe I'll go get a battery and see if I can pick up some satelites on my way home.
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[18:11] <fsphil> yea, they are normally very sensitive
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[18:15] <J0rd4n> Hi. Today we sent our second attempt at a weather balloon into space. We've been relying on an android phone and google latitude along with an app called droid locator to give us locations but two years in a row we've had problems finding it. Any tips?
[18:16] <Upu> yeah use a radio telemetry instead :)
[18:16] <Upu> what country are you in ?
[18:16] <J0rd4n> UK
[18:16] <nick_> OK, I'll see what I can pick up on my way home
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[18:16] <number10> J0rd4n: you may find the GPS in the phone doesnt work at high altitudes
[18:17] <Upu> nor will it have a signal
[18:17] <J0rd4n> Yah, we got a location of King's Lynn
[18:17] <Upu> personal project or a school one ?
[18:17] <J0rd4n> But the idea is when it lands it can use the mobile network
[18:17] <J0rd4n> School
[18:17] <Upu> it could land outside the gsm signal
[18:17] <J0rd4n> To calculate location (if no 3g)
[18:17] <J0rd4n> Well we did get a location back
[18:17] <Upu> before the next launch come speak to us
[18:17] <J0rd4n> Both times
[18:18] <Upu> wouldn't it be better to know where it is all the time though ?
[18:19] <J0rd4n> Yah, we tried but couldn't get it working
[18:19] <Upu> are you the teacher or the student ?
[18:19] <J0rd4n> I'm neither, just helped the school with the project
[18:19] <number10> there is a lot of information here http://ukhas.org.uk/
[18:19] <Upu> ok
[18:20] <J0rd4n> Thanks
[18:20] <J0rd4n> We can only hope the farmers find it now :P
[18:20] <number10> and lots of people on this irc will help you
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[18:20] <Upu> as a school come speak to us its likely someone will come along and lend you a radio transmitter
[18:20] <J0rd4n> The next one will likely be next year but just wanted to see where it went wrong. Thanks.
[18:21] <fsphil> it can be good practice to track other peoples launch
[18:21] <fsphil> launches*
[18:22] <fsphil> if you can do that, then it makes things simpler for your own if you decide to use a radio tracker
[18:23] <J0rd4n> Okay, ty for the answers :)
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[18:27] <navrac> .
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[18:44] Nick change: daveake_ -> daveake
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[19:14] <Upu> http://i.imgur.com/aupc3.jpg *cough*
[19:14] <fsphil> That's no moon!
[19:14] <daveake> Can't hear your coughing, on account of a loud jet engine :)
[19:17] <fsphil> thankfully pilots don't need RF car keys
[19:17] <Upu> can you imagine
[19:17] <Upu> "this is your pilot speaking we are currently unable to unlock the cockpit"
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[19:22] <MrScienceMan> heh, awesome picture
[19:24] <daveake> lol
[19:24] <daveake> Upu had to put pAVA in my smoker BBQ so he could unlock his car :)
[19:25] <daveake> Closest I've got to a Faraday cage
[19:25] <Upu> yeah should have unlocked it before I glued the payload up :/
[19:26] <mattbrejza> Upu: did you work out why the signal wasnt as strong as it perhaps should have benen?
[19:26] <Upu> on pava ?
[19:26] <Upu> probably because the antenna was crap
[19:26] <Upu> and/or RFM22B
[19:27] <fsphil> yea, that was a good bit down on usual - I had no chance of a decode at all
[19:27] <Upu> I don't think 11db is actually 11db
[19:27] <mattbrejza> hmm gotta check my pico can be heard at range
[19:27] <mattbrejza> across the desk is barely a test
[19:27] <fsphil> we need a field strength meter
[19:27] <Upu> I would be tempted to start running them higher, the NTX2's are noticably more powerful
[19:28] <mattbrejza> spectruim analyser tbh
[19:28] <mattbrejza> the NTX2s put out pretty much 10dBm spot on
[19:28] <mattbrejza> dunno about anything else
[19:28] <fsphil> for those that have access to them yea :)
[19:28] <mattbrejza> yea the slight issue
[19:29] <Upu> with the tracking network I don't think one packet was lost
[19:29] <Upu> but yeah it wasn't as strong
[19:29] <mattbrejza> i would like to test my pico but the moment has passed :(
[19:30] <mattbrejza> also we may end up launching mine at early hours (before the airport opens), so we will need to hear it ourselves
[19:30] <mattbrejza> also if we cant noone else will have a chance
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[19:37] <Upu> where you launching from and what time ?
[19:41] <mattbrejza> all to be decided, but there was a 6.15am from uni plan
[19:41] <mattbrejza> i tihnk the airport opens at 6.30
[19:41] <mattbrejza> mind you could goto the new forest where it wouldnt matter
[19:41] <mattbrejza> but then have to transport He
[19:41] <Upu> pico ?
[19:41] <Upu> under foil ?
[19:42] <mattbrejza> pico under latex
[19:42] <mattbrejza> so itll go up rather then drift over flight paths
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[19:43] <Upu> ok
[19:43] <Upu> so it will get high then
[19:44] <mattbrejza> hopefully :)
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[19:44] <Upu> whens your NOTAM say you can launch ?
[19:45] <mattbrejza> well the balloon will stay under 2m
[19:45] <daveake> latex?
[19:46] <daveake> small one?
[19:46] <jonsowman> did you go for the 100g mattbrejza?
[19:46] <mattbrejza> yep to all
[19:46] <jonsowman> they are very tiny
[19:46] <daveake> ok :0
[19:46] <daveake> :)
[19:46] <Upu> how high do they go ?
[19:46] <mattbrejza> 18km acording to spec sheet
[19:47] <daveake> Interesting
[19:47] <Upu> very interesting
[19:47] <mattbrejza> there are 45g ones too
[19:47] <jonsowman> surprised they're not used more often really
[19:47] <Upu> be interested to see if they float
[19:47] <daveake> ditto
[19:47] Last message repeated 1 time(s).
[19:47] <Upu> under fill it :)
[19:47] <mattbrejza> i cant see them doing it, unless they were made by howyee
[19:48] <jonsowman> are they the totex ones?
[19:48] <daveake> I have a tracker I want rid of :)
[19:48] <mattbrejza> i think so
[19:48] Action: Upu lols
[19:48] <Upu> do it
[19:48] <mattbrejza> tbh try with party balloons
[19:48] <mattbrejza> you can get some pretty big ones
[19:48] <Upu> well daveake got pava back
[19:48] <jonsowman> the 45g totex can't be much bigger than a party balloon
[19:48] <mattbrejza> i would have thought the latex would be thinner
[19:49] <mattbrejza> and how much of that is the neck?
[19:49] <jonsowman> yeah
[19:49] <jonsowman> got a link to the spec sheet to hand?
[19:50] <mattbrejza> http://www.myhoskin.com/newsletters/PDF/TypeTA.pdf
[19:50] <jonsowman> ta
[19:52] <jonsowman> the 100gs can lift 300g
[19:52] <jonsowman> loads
[19:52] <daveake> hmmm
[19:52] <daveake> Only need 30g lift
[19:53] <daveake> for a tiny tracker
[19:53] <jonsowman> the 20g ones have just under 30g free lift
[19:53] <jonsowman> 60g lift from the 30g balloons
[19:53] <daveake> Underfilling a 100 might be fun
[19:53] <jonsowman> yeah
[19:54] <daveake> or a 30 possibly
[19:54] <jonsowman> be very interesting to see how they behave
[19:54] <daveake> Who sells these?
[19:54] <mattbrejza> well i have a 11g of electronics + battery payload
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[19:54] <mattbrejza> 15g pico + TA20...
[19:54] <nick_> I got a fix on my GPS on the way home
[19:54] <Upu> evening nick
[19:54] <nick_> But then I left it on the side while I had dinner, etc and lost power :(
[19:54] <jonsowman> daveake: i think you could get them direct from totex
[19:55] <daveake> ok ta
[19:55] <mattbrejza> it wouldnt go up very quick
[19:55] <jonsowman> daveake: steve might be interested in getting a load in if lots of people want them
[19:55] <mattbrejza> any idea of ascent rate from free lift and payload mass?
[19:55] <jonsowman> or if you want lots
[19:55] <mattbrejza> i think steve got these for us btw
[19:55] <daveake> jonsowman yes
[19:55] <jonsowman> might be worth an email to the list
[19:55] <daveake> indeed
[19:56] <daveake> a few people have nice light trackers now
[19:56] <jonsowman> yeah
[19:56] <jonsowman> i can see the 100s being popular
[19:56] <mattbrejza> in the end was anyone interested in 1.8V GPSes?
[19:56] <Upu> pava is 15g with a AAA
[19:56] <jonsowman> Upu: did you use a chute/
[19:56] <jonsowman> ?
[19:56] <Upu> mattbrejza don't think so however if you do still want some let me know
[19:57] <Upu> well in the config we sent it up it was 65g
[19:57] <mattbrejza> Upu: dw, we just got some from AM
[19:57] <mattbrejza> but for future stuff
[19:57] <Upu> however we think the balloon tore
[19:57] <mattbrejza> £12 is a bit steep for shipping
[19:57] <Upu> and acted like a parachute
[19:57] <Upu> yeah
[19:57] <mattbrejza> you think it 'did a pop'?
[19:57] <jonsowman> lol
[19:57] <Upu> it went theough the motions of a burst
[19:58] <Upu> however at 25km it was doing 2.5m/s decent
[19:58] <mattbrejza> pop as in soton pop project
[19:58] <mattbrejza> dunno if you saw the image
[19:58] <Upu> I saw it
[19:58] <Upu> and possibly
[19:58] <Upu> most of the latext was still with it when Dave recovered
[19:58] <mattbrejza> 1.3m/s descent was crazy
[19:58] <mattbrejza> did it have another paracute?
[19:59] <Upu> yes
[19:59] <Upu> 12"
[19:59] <Upu> plastic estes
[19:59] <griffonbot> Received email: Mervyn "RE: [UKHAS] ARHAB Altitude Records"
[20:00] <mattbrejza> is a parachute needed for a pico, we were thinking we wouldt bother
[20:00] <mattbrejza> with balloon fragments and all
[20:01] <jonsowman> you shouldn't really rely on that
[20:01] <jonsowman> but i agree in most cases it does appear to be sufficient
[20:01] <mattbrejza> might put the whole thing in a block of polystrene/foam as well...
[20:02] <griffonbot> Received email: Anthony Stirk "Re: [UKHAS] ARHAB Altitude Records"
[20:02] <Upu> without a chute
[20:02] <Upu> the 65g payload didn't fall faster than 5 m/s
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[20:03] <mattbrejza> and lighter payload means slower fall...?
[20:03] <mattbrejza> but it is more dense :/
[20:03] <mattbrejza> maybe foam then
[20:05] <Upu> thats what I wrapped pava up in
[20:05] <Upu> put 2 x AA incase it floated
[20:05] <Upu> http://imgur.com/OYmdP
[20:06] <mattbrejza> currently i have a 3d printed case, foam will probably be needed for insulation, reduce damage on imact and reduce descent rate
[20:06] <mattbrejza> also the antenna doent look that bad
[20:10] <Upu> it was fine till the radial broke and I had to resolder it :)
[20:14] <mattbrejza> oh
[20:14] <Upu> http://www.youtube.com/watch?v=BxbvysNy1sc&feature=youtu.be
[20:14] <Upu> with sound
[20:14] <jonsowman> :D
[20:14] <jonsowman> also :O
[20:16] <Upu> I've heard 2 others close proximity to the payload but the lense was misted up
[20:18] <mattbrejza> now why does the ublox decide it wants to lose its settings so many seconds after they have been set :/
[20:18] <Upu> got it in power saving ?
[20:19] <mattbrejza> cyclic yea
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[20:19] <Upu> has it got a lock ?
[20:19] <mattbrejza> nope
[20:19] <mattbrejza> oh does it reset :/
[20:21] <Upu> bingo
[20:21] <Upu> http://ukhas.org.uk/guides:ublox_psm
[20:22] <mattbrejza> oh lol
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[20:27] Nick change: pjm -> pjmm
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[20:48] <WillDuckworth> just perusing your pics on flickr daveake - not sure 6 screens is enough - plus that cat takes up a lot of room
[20:48] <Upu> lol
[20:48] <Upu> I couldn't find the mouse pointer at one point
[20:49] <WillDuckworth> :D
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[20:53] <choppyhorse> so I got this gps unit, hooked it up to my tracker, and it didn't work. So I hooked it up to my arduino so I could read the sentences coming out of it - it seems to work fine, sees 10 satellites indoors and 16 outdoors, but never transmits a valid fix
[20:53] <choppyhorse> so I contact the company and eventually they send me a replacement, that they say is "tested," and I just hooked it up and it does the same thing
[20:54] <choppyhorse> I am going crazy
[20:54] <nick_> I'm not seeing any satelites :(
[20:55] <choppyhorse> get some binoculars
[20:55] <choppyhorse> haha
[20:55] <nick_> :'(
[20:55] <choppyhorse> maybe you need to attach an antenna to your gps
[20:56] <choppyhorse> mine has some built in patch antenna
[20:56] <choppyhorse> which for some reason is a giant chunk of cermaic
[20:56] <nick_> i have one
[20:57] <nick_> I got a fix when I was walkig around outside
[20:57] <nick_> And I guess I can see some satelites because It eventually sets the time indoors
[20:57] <nick_> But I haven't got a fix indoors.
[20:58] <jonsowman> why are you expecting it to get a fix indoors?
[20:58] <Upu> it may get a fix near a window
[20:58] <choppyhorse> I mean, if it says it can see 10 satellites, that is more than enough to get a fix. Also, my cell phone works indoors
[20:58] <jonsowman> even then, depending on the construction of the house and where you live
[20:58] <choppyhorse> I mean my cell phone gps
[20:58] <Upu> cell phones have active antennas and assistance
[20:58] <jonsowman> indoor fixes might never happen
[20:59] <nick_> I'm not expecting it to, but it would make my testing easier :)
[20:59] <jonsowman> well i wouldn't waste time waiting for it
[20:59] <jonsowman> get some fake GPS data to test your parser with
[21:00] <nick_> I should have played with it when I had a fix
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[21:00] <nick_> Or maybe I'll stick it out the window again
[21:00] <jonsowman> which gps/antenna is it?
[21:01] <nick_> ublox max6 + sarantel?
[21:01] <jonsowman> mm well that's probably your best chance of a fix indoors
[21:01] <Upu> its one of my boards
[21:01] <WillDuckworth> ah - make sure the antenna is properly soldered and glued for good measure
[21:01] <Upu> it is :)
[21:01] <WillDuckworth> of course
[21:01] <WillDuckworth> i never doubted
[21:01] <jonsowman> :)
[21:01] <Upu> does it get time near a window ?
[21:02] <nick_> It did have the time
[21:02] <j0hn> clear
[21:02] <Upu> well antenna is working
[21:02] <j0hn> sorry, wrong window
[21:02] <jonsowman> it doesn't sound like there's anything wrong with the gps
[21:02] <mattbrejza> also connect it to uCenter
[21:02] <Upu> nps j0hn
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[21:05] <choppyhorse> mine does get time indoors
[21:06] <mattbrejza> a ublox will get lock across the room from a window, but it makes it much more likely if airborne mode isnt set
[21:06] <mattbrejza> but it wont get more then 6 sats
[21:07] <jonsowman> that's not true for all rooms and all windows
[21:07] <mattbrejza> replace 'will get' with 'can get'
[21:07] <jonsowman> yeah
[21:07] <jonsowman> they are very good
[21:08] <mattbrejza> windows in labs are coated with some sort of metalic coating for eg
[21:08] <mattbrejza> might not be metallic but meh
[21:08] <jonsowman> unfortunate :P
[21:09] <jonsowman> better than the cusf lab, which is underground
[21:09] <jonsowman> no chance of gps signal
[21:10] <nick_> I stuck it out the window for a few minutes and got time pretty qiickly, but no fix
[21:10] <jonsowman> there's still your house in the way on one side
[21:10] <mattbrejza> connect it to ucenter
[21:10] <jonsowman> give it up to 10 mins and you might get a lock
[21:10] <mattbrejza> it has a jamming deteector too
[21:10] <jonsowman> good idea ^
[21:11] <mattbrejza> and shows signal strength for satellites
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[21:14] <nick_> uCenter is Windows only?>
[21:15] <jonsowman> it runs nicely under wine
[21:15] <fsphil> does indeed
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[21:16] <Lunar_Lander> hello
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[21:20] <fsphil> yo LL
[21:20] <fsphil> I'm getting a lot of google hits for "high altitude balloon" now
[21:20] <Lunar_Lander> cool
[21:20] <Lunar_Lander> fsphil, today I was able to take a photo of my board
[21:21] <Lunar_Lander> http://s.gullipics.com/image/f/t/f/5yvp1b-jaq4d9-p669/IMG0236.jpeg
[21:22] <fsphil> aaah stripboard, I remember it well
[21:22] <fsphil> my last three flight computers where built that way
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[21:27] <Lunar_Lander> yea
[21:27] <Lunar_Lander> what do you think about it?
[21:30] <Lunar_Lander> other side http://s.gullipics.com/image/t/o/0/5yvp1b-jaq4cf-2lr/IMG0238.jpeg
[21:31] <fsphil> difficult to way with stripboard, they all look the same
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[21:32] <fsphil> that and it's not finished
[21:32] <Lunar_Lander> yea
[21:33] <Lunar_Lander> we still have to install the HIH-4030, battery meter and cutdown
[21:33] <jonsowman> https://dl.dropbox.com/u/62498867/IMAG0206.jpg
[21:33] <jonsowman> :D
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[21:33] <jonsowman> component density: high
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[21:35] <Lunar_Lander> XD!
[21:35] <Lunar_Lander> hey Upu
[21:35] <Lunar_Lander> you missed the presentation
[21:35] <Upu> lucky me!
[21:35] <fsphil> wires!
[21:36] <Lunar_Lander> XD
[21:37] <Lunar_Lander> Upu,
[21:37] <Lunar_Lander> http://s.gullipics.com/image/f/t/f/5yvp1b-jaq4d9-p669/IMG0236.jpeg
[21:37] <Lunar_Lander> other side http://s.gullipics.com/image/t/o/0/5yvp1b-jaq4cf-2lr/IMG0238.jpeg
[21:37] <Upu> yeah saw that
[21:37] <Upu> does it work ?
[21:38] <Lunar_Lander> so far the green LED works and the NTX2
[21:38] <Lunar_Lander> but we get 450 Hz shift instead of 425
[21:39] <Upu> and your issue with that is ?
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[21:39] <Upu> that won't make a difference
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[21:39] <Upu> but if it really bothers you peel the sticker off the NTX2 and you can adjust it with the small pot
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[21:40] <Lunar_Lander> no just mentioning it
[21:40] <jcoxon_> evening all
[21:40] <Upu> it will be fine
[21:41] <Upu> evening jcoxon
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[21:42] Nick change: hextic_ -> hextic
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[21:52] <Lunar_Lander> hi daveake
[21:52] <Lunar_Lander> here it is
[21:52] <Lunar_Lander> http://s.gullipics.com/image/f/t/f/5yvp1b-jaq4d9-p669/IMG0236.jpeg
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[21:56] <Dan-K2VOL> nice
[21:56] <Dan-K2VOL> simple
[21:56] <Lunar_Lander> thanks
[21:56] <Lunar_Lander> today I figured out how that drill thing for disrupting tracks works
[21:57] <fsphil> I hate that thing
[21:57] <fsphil> having to do every track for a 40-pin IC (20 tracks)
[21:57] <Lunar_Lander> yea
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[21:59] <Lunar_Lander> but it was easier than I thought
[22:16] <daveake> good :)
[22:16] <Lunar_Lander> :)
[22:16] <Lunar_Lander> but my theory was right
[22:17] <Lunar_Lander> on two tracks the current can go the long way round along the power rail
[22:17] <Lunar_Lander> is that bad?
[22:18] <daveake> For the most part, no
[22:18] <Lunar_Lander> OK
[22:19] <Lunar_Lander> the rails that have the problem are the power supply of NTX2 and GPS
[22:19] <daveake> The tracks are resistors or, at high frequncy, inductors
[22:19] <Lunar_Lander> OK
[22:21] <daveake> Just use local 100nF ceramic caps where there might be a problem
[22:21] <Lunar_Lander> my problem was i.e. that I thought: what if the control lines to the NTX2 feed into the GPS?
[22:21] <Lunar_Lander> I mean you do the interruptions to seperate sections on the board
[22:21] <daveake> Really, for what we're doing, don't worry
[22:21] <Lunar_Lander> yes?
[22:21] <Lunar_Lander> but I mean
[22:21] <Lunar_Lander> it's a signal that is travelling there, right?
[22:22] <daveake> Really, for what we're doing, don't worry
[22:22] <Lunar_Lander> OK
[22:29] <fsphil> took me a while to realise that tracks can be inductors
[22:29] <fsphil> explains a lot though
[22:29] <daveake> yep
[22:32] <griffonbot> Received email: Dave "Re: [UKHAS] UKHAS Conference 2012"
[22:34] <Lunar_Lander> why exactly fsphil ?
[22:35] <Randomskk> "exactly" is a harder question
[22:35] <Randomskk> basically because all conductors are inductors
[22:35] <Randomskk> just some have much more inductance than others
[22:35] <BrainDamage> and capacitors
[22:35] <BrainDamage> and resistors
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[22:35] <Randomskk> indeed
[22:35] <BrainDamage> sometimes you can pretend you can ignore some parts
[22:35] <BrainDamage> sometimes not
[22:36] <Randomskk> usually you ignore most parts
[22:36] <BrainDamage> aren't you a physicist Lunar_Lander? you should've calculated the inductance of a straight wire and 2 coupled wires
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[22:39] <fsphil> those meddling magnetic fields
[22:39] <nick_> Magnetic fields are clearly some form of sorcery.
[22:39] <fsphil> indeed
[22:39] <nick_> Forces should not use cross products!
[22:40] <BrainDamage> meh, just change your reference frame
[22:40] Action: nick_ puts himself in a reference frame where everything is just electrical force.
[22:40] <BrainDamage> and you'll see again an e field
[22:46] <fsphil> aah physics. the more you learn the less you understand
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[22:51] <Lunar_Lander> BrainDamage, yes
[22:51] <BrainDamage> nah, everything is secretly an ( optionally harmonic ) oscillator
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[00:00] --- Tue Jul 17 2012