highaltitude.log.20150512

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[02:29] <KM4FSW> anyone know how to update habhub to show my balloon?
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[03:53] <KM4FSW> !flights
[03:53] <SpacenearUS> 03KM4FSW: Current flights: 03SP3OSJ 437.7MHz RTTY100/470/7n2 10(d9ee), 03JACKAL3P 10(18a6), 03SP9UOB - 144.250 MHz (434,500 where ham not allowed) 10(a1e1)
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[06:02] <edmoore> morn
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[07:38] <tweetBot> @crispSV: #J43VHF HAB dramatic launch footage https://t.co/0RkjCYhbWs and SSB pileup https://t.co/bkVnl1QlD1 #amsat #hab #ukhas #hamr #hamradio
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[07:57] <tweetBot> @crispSV: #J43VHF op center. Light rain and wind gusts during SSB pileup https://t.co/2qMAGqOIxq #amsat #ukhas #hamr #hamradio
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[08:51] <Vaizki> ok what is going on in that video..
[08:51] <edmoore> which video?
[08:51] <edmoore> share share share
[08:51] <fsphil> the one that claims dramatic launch footage but has someone watching aprs.fi and HF radio in the background
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[08:52] Nick change: fl_0|afk -> fl_0
[08:52] <fsphil> https://www.youtube.com/watch?v=z0_xW73ba-g
[08:52] <fsphil> oh there is actually a launch video. missed that
[08:54] <edmoore> fairly chunky payload box
[08:54] <fsphil> huge antenna
[08:55] <fsphil> wind is picking up
[08:55] <fsphil> drama!
[08:55] <fsphil> they need to do the Steve launch method
[08:56] <edmoore> have it break?
[08:56] <fsphil> lol
[08:56] <craag> That 'Portal-WebTV' logo looks familiar...
[08:56] <fsphil> have someone upwind hold the balloon
[08:56] <fsphil> it's good to copy
[08:57] <fsphil> https://www.youtube.com/watch?v=4fbwSb3KauM
[08:57] <fsphil> this is the video I saw first
[09:00] LunarWork (~kevin@pc32-338.physik.uni-osnabrueck.de) joined #highaltitude.
[09:00] <LunarWork> hello
[09:00] <craag> morning LunarWork
[09:01] <LunarWork> thanks
[09:01] <LunarWork> how's life?
[09:01] <craag> good ta, you?
[09:01] <LunarWork> same here
[09:03] <edmoore> what are tou working on LunarWork ?
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[09:12] Nick change: fl_0 -> fl_0|afk
[09:14] <LunarWork2> ah university, ed
[09:14] <LunarWork2> currently plotting yesterday's epr spectra
[09:14] <LunarWork2> (that's why other PC)
[09:17] <edmoore> epr?
[09:18] <LunarWork2> electron paramagnetic resonance
[09:18] <LunarWork2> a form of microwave spectroscopy in which electron spins are excited, as they have different energies due to the outer magnetic field the sample is in
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[09:22] <edmoore> any more habbing LunarWork2?
[09:27] <Laurenceb__> LunarWork2: very interesting
[09:28] <Laurenceb__> I was at EPR2013
[09:28] <Laurenceb__> http://www.dartmouth.edu/~eprctr/meetings/EPR2013.shtml
[09:28] <LunarWork2> cool!
[09:28] <LunarWork2> edmoore: yes, that is also running along
[09:28] <LunarWork2> but today, my lab room is being electro-safety tested
[09:28] <LunarWork2> which won't keep me from coding what I wanted to do later
[09:28] <LunarWork2> :)
[09:30] <Laurenceb__> http://uk.mouser.com/ProductDetail/Techspray/1638-54G/?qs=sGAEpiMZZMvJqaFk9BIivz97Mkiy9G9ykN%2fNGMSxnUs%3d
[09:30] <Laurenceb__> muh flux remover
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[09:34] <LunarWork2> done here
[09:34] <LunarWork2> :)
[09:34] <LunarWork2> bbl
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[09:45] <Laurenceb__> https://www.youtube.com/watch?v=5cKpzp358F4
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[09:47] <edmoore> it's pretty cool that that happened
[09:47] <edmoore> shame it was nearly 50 yrs ago
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[10:08] <Laurenceb__> oops http://i.imgur.com/wyuzAin.png
[10:08] <Laurenceb__> vibration transfer function of ambulance chassis to patient lying in the back
[10:08] <Laurenceb__> thats not good news
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[10:38] <michal_f> are you in ambulance with an accelerometer ? :)
[10:38] <Laurenceb__> yes
[10:38] <Laurenceb__> http://www.kvh.com/Commercial-and-OEM/Gyros-and-Inertial-Systems-and-Compasses/Gyros-and-IMUs-and-INS/Fiber-Optic-Gyros/DSP-1760.aspx
[10:38] <Laurenceb__> nice
[10:38] <edmoore> how much Laurenceb__ ?
[10:39] <Laurenceb__> cant see a price
[10:39] <edmoore> they like it that way
[10:40] <infaddict> http://www.bbc.co.uk/news/technology-32690000
[10:40] <amell> so who is doing the expenses paid trip to spain? :)
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[10:54] <edmoore> amell, context?
[11:00] <amell> the posting to ukhas mailing list.
[11:01] <Darkside> i should apply
[11:01] <Darkside> :P
[11:01] <Darkside> wouldnt mind an all expenses paid trip to europe
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[11:12] <edmoore> sounds awful
[11:12] <edmoore> these madcap schemes in foreign countries are often not worth it
[11:13] <edmoore> unless they're actually paying you early as a contractor
[11:13] <edmoore> Laurenceb__, looking through an old external hdd
[11:13] <edmoore> http://i.imgur.com/e6Likvo.jpg
[11:14] <craag> Is that the parachute-glider?
[11:14] <craag> thingy
[11:15] <edmoore> rogallo
[11:15] <edmoore> another pic coming
[11:15] <edmoore> (slowly as upload link saturated by work atm)
[11:15] <Vaizki> DSP-1750: $4000(Single Axis, Dual axis is $8000)
[11:15] <Vaizki> very cheap these FOGs
[11:17] <edmoore> i was a nice job tho
[11:17] <edmoore> compared to some of the earlier Laurenceb__ mechanical designs :)
[11:19] <edmoore> http://i.imgur.com/rO7PuJl.jpg
[11:20] <Vaizki> and you dropped that from where?
[11:20] <craag> Neat
[11:20] <mattbrejza> is that a picaxe programming cable?
[11:21] <craag> programming at the launch site? never!
[11:21] <Vaizki> unimaginable
[11:22] <daveake> I do all mine at my launch site :p
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[11:28] <LunarWork> :D
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[11:36] <x-f> how did it perform?
[11:36] <x-f> what year was this?
[11:36] <x-f> what is that thing behind the laptop screen?
[11:37] <x-f> what is that black switch on the payload box for?
[11:37] <mattbrejza> usb serial converter i think
[11:38] <x-f> pretty huge compared to today's FTDI's..
[11:38] <x-f> was it autonomous or RC controlled when closer to the ground?
[11:40] <craag> iirc it stored a profile of the wind as it ascended, and then applied that against it's desired path to allow it to land autonomously.
[11:41] <craag> also iirc, it had some trouble with rigging knots that meant it never got to work properly.
[11:42] <x-f> there is an RC RX between the GPS and the servo, and a TX on the table, which is why i'm wondering
[11:42] <craag> Ah ok
[11:43] <edmoore> so many questions x-f
[11:43] <edmoore> come to the conf
[11:43] <edmoore> giving the talk on the early history of ukhas
[11:43] <craag> ^^ +!
[11:43] <craag> +1
[11:43] <x-f> aww
[11:43] <fsphil> we can have burgers again
[11:43] <fsphil> mmm
[11:43] <craag> yum
[11:44] Action: daveake just made abcon/egg buttie for lunch
[11:44] <mattbrejza> not sure youll want to travel ucl -> greenwich for burgers though
[11:44] <daveake> fix for typos ^
[11:44] <fsphil> oh yes, different location
[11:45] <adamgreig> maybe we should book a restaurant this time lol
[11:45] <fsphil> I gotta remember that when booking the train
[11:45] <mattbrejza> fairly sure danielsaul is throwing a bbq for everyone afterwards ;)
[11:45] <fsphil> woo-hoo!
[11:45] <adamgreig> ah good work danielsaul ;)
[11:45] <daveake> Does he know yet?
[11:46] <mattbrejza> not sure
[11:46] <adamgreig> hah
[11:46] <mattbrejza> not sure a garden is a thing in central london student houses though
[11:47] <fxmulder> what is abcon?
[11:47] <fxmulder> sounds like a conference for people with six packs
[11:48] <adamgreig> doubt you'll get many six packs from abcon butties
[11:49] <x-f> if Lunar is coming, i too will try to make it this year
[11:49] <edmoore> fxmulder, bacon
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[11:50] <edmoore> LunarWork, come to the conference
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[11:57] <craag> Lunar is coming
[11:57] <craag> At least he's said he will
[11:58] <danielsaul> I have a balcony... with room for about 2 people :P
[11:58] <craag> Or 1 person + a bbq?
[11:59] <danielsaul> True
[12:03] <Laurenceb__> back
[12:03] <Laurenceb__> aaah im on the internet
[12:04] <Vaizki> would be great to attend your conference but I don't have much hope of making it without relocating my last vacation week to london
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[12:05] <Vaizki> and that would cost me thousands in wife-related shopping accidents
[12:05] <Laurenceb__> x-f: 2009
[12:06] <Laurenceb__> and its not using picaxe lol :P
[12:06] <Laurenceb__> I just abused a picaxe cable as I liked it
[12:06] <mattbrejza> i thought that was the case
[12:07] <Laurenceb__> atmega168 iirc
[12:09] <edmoore> it was a nice bit of work Laurenceb__
[12:10] <Laurenceb__> thanks
[12:10] <Laurenceb__> pity about the knot issues, but at least it demonstrated stable flight
[12:10] <Laurenceb__> nice ~300m circles at ~3.8 glide ratio most of the way down
[12:11] <edmoore> should try again
[12:12] <Laurenceb__> yeah... at this years conference everyone will find out why I dont have enough spare time for that...
[12:12] <Laurenceb__> due to even more outrageous projects
[12:15] <Laurenceb__> mlx90609 is surprisingly good
[12:15] <Laurenceb__> only twice the drift of max21000
[12:15] <edmoore> i'm sure they'll enjoy the talk
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[12:16] <Laurenceb__> it might be a bit depressing
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[12:16] <edmoore> it won't be
[12:16] <edmoore> provided it gets to a flight
[12:16] <Laurenceb__> unless i manage to pull something good off in the next few weeks
[12:16] <Laurenceb__> yeah, some motivation for me to get some work done :D
[12:17] <edmoore> yep
[12:17] <edmoore> deadlines are the only way
[12:19] <Laurenceb__> may too much "3D printing" involved in the current design
[12:19] <Laurenceb__> I'll call it SLS to avoid maker connotations
[12:19] <edmoore> might get other rocket connotatiosn tho
[12:20] <Laurenceb__> haha almost as bad
[12:20] <Laurenceb__> interestingly the rocket part is the easy bit
[12:20] <Laurenceb__> the apparently obvious spinny bit is the headache
[12:22] <edmoore> the rpms for the least power?
[12:22] <Laurenceb__> the rpms without ripping itself apart from vibration
[12:23] <Laurenceb__> supercritical bearings are a pita
[12:25] <Laurenceb__> turns out bearing frictions can effectively give negative damping in some conditions
[12:25] <Laurenceb__> *-s
[12:26] <Laurenceb__> its why horrifying stuff like this exists
[12:26] <Laurenceb__> http://gasturbinespower.asmedigitalcollection.asme.org/data/Journals/JETPEZ/931173/gtp_137_05_052506_f005.png
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[12:39] <km4fsw> Hey can somebody add my balloon to habhub?
[12:39] <km4fsw> Callsign JB-1
[12:40] <adamgreig> do you have the flight ID?
[12:43] <km4fsw> ??? Flight ID?
[12:43] <km4fsw> Its on aprs.fi under JB-1
[12:43] <lz1dev> !aprs info JB-1
[12:43] <SpacenearUS> 03lz1dev: No matches found
[12:43] <lz1dev> is an object isn't it?
[12:45] <lz1dev> its not
[12:45] <lz1dev> intreasting
[12:46] <lz1dev> !aprs ping jb-1
[12:46] <SpacenearUS> 03lz1dev: No matches found
[12:48] <km4fsw> http://aprs.fi/#!call=a%2FJB-1&timerange=3600&tail=3600
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[13:01] <LunarWork> yeah craag already said that I am looking into making it this time :)
[13:03] <daveake> woah
[13:03] Action: fsphil sits down
[13:07] <km4fsw-1> Sorry i stepped away, so no chance having my balloon display on habhub?
[13:08] <craag> km4fsw-1: It looks like the aprs.fi API isn't working properly for it, I think lz1dev is looking into it.
[13:08] <km4fsw-1> Awesome thanx craag
[13:10] <SpacenearUS> New position from 03sp9uob after 0320 hours silence - 12http://tracker.habhub.org/#!qm=All&q=sp9uob
[13:13] <LunarWork> :)
[13:16] <Laurenceb__> ooh wow
[13:16] <Laurenceb__> long float
[13:16] <lz1dev> craag: no idea why JB-1 not showing up
[13:16] <lz1dev> nothing in the logs
[13:17] <Laurenceb__> K6RPT-11 heading for Hawaii
[13:18] <lz1dev> !whereis k6rpt-11
[13:18] <SpacenearUS> 03lz1dev: 03K6RPT-11 was over 03North Pacific Ocean 10(32.37749,143.53709) at 0313093 meters about 03a day ago
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[13:18] <Laurenceb__> according to hysplit should be there tomorrow
[13:18] <chris_4x1rf> Hi All!
[13:19] <chris_4x1rf> succesfully decoded SP9UOB now: $$sp9uob,79,131609,28.73854,30.19870,8906,8602,157,67,2,32608,241,111,60b,9,*282e
[13:19] <chris_4x1rf> Congrats to the SP9UOB team!
[13:24] <SpacenearUS> New vehicle on the map: 03N1ME-11 - 12http://tracker.habhub.org/#!qm=All&q=N1ME-11
[13:25] <SpacenearUS> New position from 03KB1YOF-11 after 0313 days silence - 12http://tracker.habhub.org/#!qm=All&q=KB1YOF-11
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[13:54] <km4fsw-1> !aprs ping JB-1
[13:54] <SpacenearUS> 03km4fsw-1: No matches found
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[14:12] <mimo> hey! how much rope do i need for 1600g balloon
[14:13] <Ian_> 15m of a train and rigging for the package - Balloon to chute 10m, chute to package 5m
[14:14] <craag> Other way round Ian_
[14:14] <Ian_> OK, thanks on that craag
[14:14] <craag> ;)
[14:14] <daveake> yeah, and don't use actual rope :)
[14:15] <Ian_> 2mm braided nylon?
[14:15] <daveake> 1.5 is ample
[14:15] <daveake> Best to keep the strength down
[14:16] <Ian_> Don't want to reel in a jumbo jet on finals :)
[14:17] <Ian_> Or pull trees down getting the package from the canopy in the forrest
[14:17] <mimo> so what do you think about 4mm polypropylene
[14:19] <Ian_> It's not braided and it's too heavy
[14:19] <mimo> what means braided
[14:19] <daveake> and too strong
[14:20] <Ian_> Braiding means that there is no tendency of for the rope to cause spin under tension - braided means woven
[14:20] <daveake> Just get some 1.5mm braided nylon.
[14:22] <mimo> im in shop right now and they have polypropylene and polyester ropes
[14:23] <mimo> i gotta get something from here
[14:23] <adamgreig> what's the thinnest they have?
[14:23] <adamgreig> 4mm is a bit chunkier than you need and quite heavy, so 1mm or 1.5mm would be better
[14:24] <daveake> It needs to be braided
[14:24] <daveake> And 2mm max
[14:24] <Laurenceb__> SpeedEvil: http://www.extremerc.com.au/estore/index.php?main_page=product_info&cPath=146_11_195_252&products_id=1218
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[14:24] Action: Laurenceb__ wonders about a vertical ascent vehicle using one
[14:27] <mimo> they have 1.7 and 2.2mm polyester one which is used for ribbedcurtains or however this word is in eng :)
[14:28] <adamgreig> 1.7 should be fine; is it braided?
[14:28] <daveake> i.e. looks like http://www.dandsframes.co.uk/lordoftheframes/700px/3xcords-closeup.jpg
[14:31] <edmoore> PSU arrived
[14:31] <edmoore> also 100 cute e-stop switches
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[14:32] <esculca> hey guys, has anybody here played with those 433MHz modules of ebay to do CW?
[14:32] <esculca> I am not able to decode them on FLdigi
[14:33] <edmoore> which ones in particular?
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[14:33] <esculca> all I am getting is the «E» letter
[14:33] <edmoore> there are many
[14:33] <esculca> those that only allow OOK
[14:33] <esculca> cheap
[14:33] <edmoore> yes there are many
[14:33] <edmoore> but regardless, you can tell by ear if it's sounding morsey
[14:33] <edmoore> so i guess if it's not working it'll be an issue of timings of the Tx or Rx
[14:33] <esculca> yes, I can hear the tones
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[14:34] <esculca> but my fldigi only decode the letter «E»
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[14:34] <esculca> E is a dot
[14:34] <moma> http://imgur.com/rU4YYa2
[14:34] <esculca> I have the tracking enabled
[14:34] <moma> i didnt see your answers for 1.7 polyester
[14:34] <moma> phone logged out
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[14:35] <edmoore> esculca, can you take a screenshot
[14:35] <edmoore> including the waterfall
[14:36] <Ian_> [15:28] <daveake> i.e. looks like http://www.dandsframes.co.uk/lordoftheframes/700px/3xcords-closeup.jpg
[14:36] <esculca> let me try something in here edmoore
[14:37] <moma> or 3mm polyprop is better
[14:38] <daveake> I'm not sure if you've seen what was recommended to you
[14:38] <moma> righ now thinnest opinions are 1.7mm polyester and 3mm polyprop
[14:38] <Ian_> Morse on 433.92MHZ Chinese tx Best received using AM. Using an FM rx won't work and SSB is difficult. Make sure you key tone to tx
[14:38] <daveake> Get the thinnest braided "rope" that they have
[14:38] <Laurenceb__> there is another option
[14:38] <Laurenceb__> but it may remove your hands
[14:39] <Laurenceb__> dyneema
[14:39] <Ian_> Wear gloves
[14:39] <daveake> I have some dyneema for cutdowns
[14:39] <moma> well they all are braided if i understood the meaning right. look at my imgur pic
[14:40] <daveake> 1.7mm braided then
[14:40] <moma> polyester is fine?
[14:40] <daveake> I think we told you that a few times
[14:42] <moma> ty
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[14:46] <Ian_> Wow, never heard of dyneema before Laurenceb__ Now looking for Candy pink 0.55mm 45kg breaking strain sample. Sounds like awsome stuff.
[14:47] <Laurenceb__> yeah, almost good enough for a space elevator
[14:47] <Laurenceb__> of the rotovator type
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[14:48] <Laurenceb__> http://en.wikipedia.org/wiki/Momentum_exchange_tether#Rotovator
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[14:57] <esculca> this is my setup
[14:57] <esculca> https://meocloud.pt/link/23519aa6-bd1c-44c4-b34c-920f982551e6/capture2.png/
[14:57] <esculca> I am no able to decode CW
[14:57] <spiglerg> morse code? :D
[14:57] <esculca> I can hear the tones
[14:57] <craag> dat bandwidth
[14:58] <esculca> too much?
[14:58] <JR__> Hi Craag, we spoke last week re tracking using gqrx and fldigi
[14:58] <craag> From what I can see on sdr#, the 'tone' is several hundred Hx side.
[14:58] <edmoore> it's quite noise and spread out
[14:58] <craag> *Hz
[14:58] <craag> Hi JR__
[14:58] <JR__> Resolved my Pulse audio issues and almost there..
[14:58] <JR__> http://imgur.com/pYvDO6K
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[14:59] <craag> JR__: Nearly, your configured rtty shift is way off though
[14:59] <esculca> reduce the bandwidth to how much?
[14:59] <craag> JR__: Reduce the rtty shift in dlfldigi to 600hz
[15:00] <craag> (It's 910hz currently)
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[15:00] <JR__> that's right... knew there was somthing else we'd done.. trying now
[15:00] <edmoore> esculca, i think it's more than the CW module is quite unstable
[15:00] <edmoore> can you slow the CW words-per-minute right down?
[15:01] <esculca> yes i can, but the result is the same
[15:02] <esculca> well, actually I Cannot hear the tones very well
[15:02] <esculca> I heard them something life with a doppler effect
[15:02] <esculca> the tone ecreases or dcreases the frequency
[15:03] <craag> esculca: The cheap modules aren't designed to be very frequency-accurate, so they will drift a lot.
[15:03] <craag> Far too much for CW without modification.
[15:03] <JR__> better, but not consistently getting complete string http://imgur.com/Lwl9Z3l
[15:03] <esculca> what kind of modification?
[15:04] <esculca> I am basically building my backup tracking device
[15:04] <JR__> payload and sdr are only 2m apart
[15:04] <esculca> My payload has already the lora and rtty workin fine
[15:04] <craag> JR__: Ah, you appear to be listening to an 'image' in gqrx
[15:04] <esculca> this is the another arduino just doing morse over this cheap module
[15:04] <craag> esculca: A more stable crystal would be the first step.
[15:04] <esculca> in case the main module fails
[15:05] <craag> esculca: Easiest thing would be to buy an NTX2B ;)
[15:05] <esculca> I Can basically use an oscillaotr
[15:06] <esculca> I have the NTX2B in here
[15:06] <esculca> theu thing is that I didn't want to use it
[15:06] <esculca> I wanted a cheap bakup
[15:06] <craag> Getting the frequency stability for CW at 434MHz is hard
[15:06] <craag> especially when you're turning the thing on and off all the time
[15:07] <esculca> I have in here a TXCO
[15:07] <craag> In the cheap module?
[15:08] <esculca> no, it's anpother one that I have in here
[15:08] <esculca> but it's 20 MHz
[15:08] <esculca> I Can use it
[15:08] <craag> It needs to be in spec for the transmitter IC..
[15:08] <esculca> it's just an oscillator
[15:08] <esculca> I will simple turn it on and off
[15:09] <craag> If it's a decent RF IC, you may get the stabilit you need
[15:10] <craag> But I doubt it.
[15:10] <craag> You might do better leaving it on and frequency-shifting it away for the key-up.
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[15:11] <craag> That way it isn't heating/cooling the whole time
[15:11] <craag> But still - gonna need a good tcxo.
[15:12] <esculca> OX-4022-EAE-1080-20M00 - Vectron
[15:12] <esculca> it's this one
[15:15] <craag> That's an ocxo..
[15:16] <esculca> i meant ocxo
[15:16] <esculca> sorry
[15:17] <craag> Bit overkill maybe.. it is in spec for the transceiver ic?
[15:17] <esculca> too much you mean?
[15:18] <craag> Yeah aren't they a bit pricey?
[15:18] <esculca> they are, but I got them for free
[15:18] <esculca> thet are pretty stable
[15:18] <craag> First though - check the transmitter/transceiver IC will actually work with that frequency.
[15:18] <esculca> the SDR?
[15:19] <craag> How are you planning to use this ocxo?
[15:19] <esculca> while I am talking with you I trying to receive the tone here in SRD
[15:19] <esculca> OOK
[15:19] <craag> right..
[15:19] <craag> how?
[15:19] <esculca> just turn the OCXOON and OFF
[15:20] <craag> Which will give a very weak signal at 20MHz...
[15:20] <esculca> with a transistor or somrthing
[15:20] <craag> Transmitting at 20MHz?
[15:20] <esculca> yes
[15:20] <craag> Is that legal for you?
[15:20] <esculca> that's another issue.... :)
[15:20] <craag> No point persuing this further if it isn't.
[15:21] Action: craag afk
[15:21] <esculca> agree...
[15:21] <esculca> :)
[15:21] <esculca> afk = ?
[15:21] <esculca> but I agree with you
[15:22] <esculca> I could nevertheless use the 27 MHz band
[15:22] <Geoff-G8DHE-M> away from keyboard - afk
[15:22] <esculca> with another oscillator
[15:22] <esculca> thanks Geoff
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[15:29] <SpacenearUS> New position from 03SP9UOB-12 after 03a day silence - 12http://tracker.habhub.org/#!qm=All&q=SP9UOB-12
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[15:40] <spiglerg> Hi everybody, I'm new to HAB but I'm trying to make a few nice tests :)
[15:40] <spiglerg> However I've been stuck on rtty transmission for a week now, and I'd really use some help :/
[15:40] <spiglerg> really quick description of my setup: arduino board + ntx2b transmitter + usb sdr dongle + gqrx & dl-fldigi (on Linux)
[15:41] <spiglerg> the transmitter works fine when I debug it with pulses on mark and space 0.5 seconds long (in order to see them in the waterfall)
[15:42] <spiglerg> however when I try to use rtty encoding (50 baud, 2 stop bits, 7 bit ascii) I can't make fldigi to decode my transmission properly :/
[15:42] <spiglerg> http://picpaste.com/Screenshot-UXEVVIDu.png
[15:42] <SpeedEvil> Laurenceb__: that is quite cheap
[15:42] <edmoore> spiglerg, have you tried hitting 'Rv' button on the bottom right?
[15:42] <daveake> spiglerg First off, try hi...
[15:42] <spiglerg> yep
[15:42] <daveake> ... ok edmoore beat me to it
[15:43] <adamgreig> spiglerg: sooo there's this one annoying issue with gqrx and dl-fldigi
[15:43] <spiglerg> daveake: I'm really sorry I tried to condense everything because I have to leave home in ~ half an hour and I'm running my last tests :(
[15:43] <adamgreig> to do with sample rates
[15:43] <adamgreig> where gqrx outputs 48000 samples-per-second audio into a 44100 samples-per-second channel in pulseaudio
[15:43] <adamgreig> and so dl-fldigi's timing is thrown off
[15:43] <spiglerg> hmm
[15:43] <adamgreig> and you cannot decode what looks like quite good data
[15:44] <spiglerg> that sounds like a very good reason for why this is not working :D
[15:44] <adamgreig> well maybe
[15:44] <adamgreig> it's a shitty reason, truth be told
[15:44] <adamgreig> and it's possible you're just not encoding the data correctly
[15:45] <adamgreig> but it's a good one to rule out
[15:45] <spiglerg> I'll try to dive into fldigi's settings to see what rate it's using ;)
[15:45] <adamgreig> edit the file /etc/pulse/daemon.conf as root
[15:45] <spiglerg> thank you so much :D
[15:45] <adamgreig> default-sample-rate = 48000
[15:45] <adamgreig> write it out, then "pulseaudio --kill" (as user)
[15:45] <adamgreig> close gqrx and fldigi first
[15:46] <adamgreig> then reopen them and give it a go
[15:46] <infaddict> adamgreig: is this a linux only issue? not had it in OSX.
[15:46] <adamgreig> infaddict: it's a pulseaudio issue
[15:46] <infaddict> ah ok
[15:46] <adamgreig> don't think gqrx or fldigi use pulse on OS X
[15:46] <infaddict> nope
[15:46] <adamgreig> I think there are probably better ways around it than this ^ brute force thing
[15:46] <adamgreig> but it's quite quick
[15:46] <adamgreig> it's very annoying that gqrx can't be told to put 44100 into pulse
[15:46] <adamgreig> i think it's gqrx's fault not fldigi as far as I know
[15:46] <adamgreig> shrug
[15:47] <adamgreig> failing that spiglerg, use fldigi to record a wav file, and also use qgrx to record a wav file, (both can record audio to wav) and upload them somewhere
[15:47] <adamgreig> you can use pulseaudio to view the data and check the bit timing yourself too which is nice
[15:47] <adamgreig> (brb)
[15:49] <spiglerg> adamgreig: yeah it's still giving some problems but it may be worth to just reboot and try again. if it still won't work I'll record the audio and post it :)
[15:50] <adamgreig> Search Google for gqrx pulse audio null sink for another nicer method of connecting them up
[15:50] <spiglerg> I'm back in 1 minute ;)
[15:50] <spiglerg> ok :)
[15:50] <spiglerg> thank you a lot :)
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[15:51] <spiglerg> back
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[15:59] <spiglerg> ok it works now!! :D I guess the problem was the different sampling rates :D
[15:59] <adamgreig> nice
[15:59] <spiglerg> thanks everybody, and thank you adamgreig :D
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[16:05] <edmoore> 10 points to adam
[16:05] <spiglerg> :D
[16:05] <spiglerg> so, where are you guys from? is there anyone from Sheffield? :D
[16:05] <adamgreig> -10 points to gqrx for being bad at this thing
[16:05] <spiglerg> :P
[16:05] <adamgreig> wish there was some better linux sdr software
[16:05] <adamgreig> guess i should put up or shut up tho
[16:06] <edmoore> spiglerg, i was in sheffield last weekend
[16:06] <LunarWork> be back later :)
[16:06] <adamgreig> it's probably gnuradio's fault anyway]
[16:06] <edmoore> i'm hoping to be again soon
[16:06] <adamgreig> gqrx is a lot better than trying to use a grc sheet :p
[16:06] <edmoore> but i live in oxford
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[16:10] <spiglerg> edmoore: hehe cool! I think that the peak district would make a nice launching location!
[16:10] <spiglerg> oh nice! :D
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[16:12] <russss> gqrx is basically unmaintained, I have spotted some pretty weird bugs in it which I think are related to it occasionally forgetting it has to process the real or complex parts of the data
[16:13] <adamgreig> lol
[16:13] <adamgreig> yea
[16:13] <adamgreig> the maintainer has basically said "sorry i'm done here" I think?
[16:13] <russss> and like, toggling various weird settings fixes it, for a while
[16:13] <adamgreig> "sorry, I'm done here" more clear perhaps
[16:13] <adamgreig> my main beef is just this stupid sampling rate issue
[16:13] <russss> then occasionally you'll retune and suddenly everything is mirrored about the centre frequency again
[16:13] <adamgreig> oh and I would like to transmit from my microphone too :P
[16:13] <adamgreig> lol
[16:14] <adamgreig> found any alternatives?
[16:14] <spiglerg> it would be awesome for fldigi to be able to sample directly from the sdr..
[16:14] <adamgreig> yes, it really really would
[16:14] <russss> nope. I'm thinking about writing something myself which basically amounts to a modular WebSDR setup
[16:15] <spiglerg> then we could use radio scanners to look up the transmission frequencies but at least the decoding software would be self contained!
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[16:15] <russss> I've got a box with a load of RTLSDRs and Raspberry Pies which is going to go on my roof, so I want to do some minimal tuning and demodulation on the Pi and then send stuff over ethernet
[16:16] <adamgreig> yea
[16:17] <russss> the RPi2 seems happy running rtl_tcp on 3 SDRs but more than that will max the ethernet out
[16:17] <adamgreig> meh, get another rpi2?
[16:17] <russss> that is a possibility
[16:17] <adamgreig> streaming the IQ seems more useful than streaming a waterfall image and interactive tuning and doing demodulation on the rpi, maybe
[16:18] <russss> but I'm curious about the capability of the Pi to demodulate what I want. I don't have any significant computing power elsewhere on my home network to do that stuff on
[16:18] <SpeedEvil> adamgreig: If you have oodles of banwidth
[16:18] <SpeedEvil> For a local system, sure
[16:18] <adamgreig> SpeedEvil: assuming a local lan
[16:18] <spiglerg> alright guys, gotta go now -- I'll be back in late evening :P
[16:18] <SpeedEvil> But the PI sucks.
[16:18] <russss> yeah I'd need to add a gigabit switch to that box if I added another Pi at the moment
[16:18] <spiglerg> bye!! and thanks again! :D
[16:19] <adamgreig> spiglerg: seeya :)
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[16:19] <adamgreig> russss: yea, fair enough to demod locally i guess. depends wha tyou're doing with it too right
[16:19] <SpeedEvil> It's constrained to one USB port - and you share the USB port with the network card, so are never going to get ~20 megabytes/s on it.
[16:19] <adamgreig> if you want ADS-B you might as well decode entirely on the pi and just send out the datagrams
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[16:20] <adamgreig> if you want to listen to old men talk on repeaters you might as well hook a markov chain up to webMD and a bad speech synth
[16:20] <daveake> I have a Pi (old B version) doing ADS-B with an SDR
[16:20] <daveake> Uses approx 30% CPU
[16:21] <russss> rtl_adsb on the new one is more like 10% of one core
[16:21] <daveake> This was feeding 1 local web page at the time, so it'd be lower without that
[16:21] <daveake> V2 B was 25% of one core
[16:22] <russss> ADS-B is not terribly interesting in London as there's plenty of flightradar coverage etc
[16:24] <adamgreig> what are you planning on using them for?
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[16:41] <tweetBot> @cheekyvimto13: #ukhas prisons groaning @seams wh frequently suicidal inmates, civil& criminal legal aid in a state of near collapse, criminal barristers
[16:42] <x-f> :|
[16:49] <prog> will it blend
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[17:07] <SpacenearUS> New vehicle on the map: 03wb2ljk_chase - 12http://tracker.habhub.org/#!qm=All&q=wb2ljk_chase
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[17:15] <Lunar_Lander> evening
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[18:10] <SpacenearUS> New vehicle on the map: 03AMFTST01 - 12http://tracker.habhub.org/#!qm=All&q=AMFTST01
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[19:01] <Tjalling_PE1RQM> Are the AMFTST01 members online here? I can receive your testsignal from the ground. Please send me a message, because I'm interested in what you guys are preparing
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[19:16] <Ian_> Close enough to drive/cycle over and take a peek - mobile tracker at the ready . . . :) Have a good evening.
[19:17] <Tjalling_PE1RQM> Thanks Ian, I do not have a mobile tracker, but I can have a look. but the position is not very well fixed :)
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[19:53] <Ian_> Looks like a lot of woods there, so the nearest open ground is what looks a bit like a school field to the SE of the road. Looks like they may have taken it back to base with the tracker running.
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[19:54] <Ian_> They might at least come up here and invite you over for beer or a HAB chinwag.
[19:58] <Ian_> It seems HABbing is breaking out all over the Netherlands and spreading outwards from Den Hague.HAB, HAB, HAB, up up and away! :)
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[19:58] <Ian_> AFK Sked
[20:05] <Tjalling_PE1RQM> He just emailed me! He lives 100m from my house!!
[20:05] <Tjalling_PE1RQM> He did a test drive with a car I think
[20:05] <Tjalling_PE1RQM> HAB is indeed gaining in popularity in NL :)
[20:06] <fsphil> hah
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[20:40] <DL7AD_> Upu: ping
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[20:41] <Upu> hey Sven
[20:43] <DL7AD_> hi anthony. quick question i will sent you by PM
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[20:43] <fsphil> parrot mail
[20:44] <DL7AD_> :D
[20:44] <nik996> Hi everyone
[20:44] <fsphil> hiya nik996
[20:45] <nik996> I've just see the text box
[20:45] <nik996> after 1 min and 7 sec hihi
[20:46] <fsphil> strange. I've not used the webchat often, but it's usually pretty fast
[20:46] <nik996> The problem is in my mind hihi
[20:47] <nik996> I have some question about U-BLOX MAX M8Q which I bought from Nevis Computer
[20:47] <fsphil> fire away
[20:48] <nik996> Fire? You mean I could write my questions?
[20:48] <fsphil> yes
[20:48] <nik996> ahahah ok sorry about my english knowledge
[20:49] <nik996> I use this module with arduino
[20:49] <nik996> I would like to know how to set some parameters with u-center
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[20:51] <nik996> because if I send a message in configuration form nothing seems to be applied to the module
[20:51] <nik996> for example the frequency
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[20:54] <fsphil> there is a way to get u-center to talk to the ublox through the arduino board, although I can't find it now
[20:54] <fsphil> even if you did that though, the ublox module won't remember the settings once its powered off
[20:54] <nik996> I know
[20:55] <DL7AD_> https://drive.google.com/file/d/0BwzVllHCGu5FbDBQbjctQjhqUlk/view?usp=sharing
[20:56] Action: DL7AD_ is working on the new pecan pico 6 tracker
[20:56] <nik996> I find a method which consist in charge some code in arduino, open a serial connection to the module and send to the module some bytes
[20:56] <fsphil> DL7AD_: ich liebe es!
[20:56] <DL7AD_> :D
[20:56] <fsphil> the DS1104Z is a fine thing
[20:57] <fsphil> nik996: yea, there are some examples of that on the ukhas wiki
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[20:58] <DL7AD_> fsphil: yes its a good one
[20:58] <DL7AD_> bought it for such cases
[20:58] <nik996> ok I'll do some other try
[20:59] <nik996> fsphil: thanks
[20:59] <fsphil> https://ukhas.org.uk/guides:ublox6
[21:02] <nik996> fsphil: many thanks
[21:02] <nik996> I found the solution in your link
[21:03] <nik996> because I would like to reduce the data transmission frequency to give some time to arduino to read serial and then to store necessary info on some variables
[21:04] <nik996> arduino uno has 2K byte of memory and it is quit small in my opinion
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[21:04] <fsphil> it's impressive what you can do with 2k ram
[21:05] <nik996> It's could also impressive what problem you can find
[21:05] <fsphil> hehe yes
[21:05] <fsphil> and unexpected problems if you use too much
[21:05] <nik996> exactly what I mean
[21:06] <nik996> I'm preparing an hub for an exam
[21:06] <nik996> I'm an italian guy
[21:06] <fsphil> but for a basic tracker, you only need some small strings buffers and a handful of integers
[21:06] <nik996> I use a gsm shield to send information
[21:06] <nik996> until i reach3/4km
[21:06] <fsphil> yea that'll use a bit more
[21:07] <fsphil> if your GSM commands don't change, consider storing them in PROGMEM
[21:07] <nik996> you mean the string?
[21:07] <fsphil> yea
[21:07] <nik996> at command string
[21:07] <nik996> ok
[21:08] <nik996> it is a good idea
[21:09] <nik996> if the module cannot see glonas during the launch
[21:10] <nik996> it cannot receive information over 12km. it is right?
[21:11] <nik996> If I understood GPS has some limits about the altitude
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[21:12] <nik996> how do you mesaure pression?
[21:13] <nik996> What does the sensor you use?
[21:14] <Jartza> 2kB sounds like huge amount of ram :)
[21:14] <daveake> 12km is not a GPS limit; it's a software limit in the receiver. For UBlox you can remove this limit by setting it to flight mode
[21:14] <nik996> Ah ok
[21:14] <daveake> Pressure is not a very useful measurement, generally
[21:15] <nik996> why not
[21:15] <nik996> what other meteo mesures are interesting?
[21:15] <nik996> I register pressure and temp
[21:15] <SpacenearUS> New vehicle on the map: 032E0EDJ - 12http://tracker.habhub.org/#!qm=All&q=2E0EDJ
[21:15] <daveake> It is almost totally dependent on altitude
[21:16] <daveake> and at high altitude most pressure sensors will not produce an accurate reading
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[21:17] <nik996> ok but tell me what other measures
[21:19] Nick change: fl_0|afk -> fl_0
[21:19] <Ian_> Humidity?
[21:21] <Ian_> Ambient light or UV?
[21:21] <fsphil> temperature is always fun
[21:21] <fsphil> nice to see how cold it is up there, or if there are inversion layers
[21:21] <Ian_> Ooops, forgot that, it is always taken as a given . . .
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[21:21] <fsphil> UV would be interesting
[21:22] <nik996> what uv sensor
[21:22] <nik996> i don't know any kind of uv
[21:22] <nik996> light I think could be difficult
[21:22] <mattbrejza> radiation
[21:22] <daveake> there are i2c uv/visible sensors
[21:23] <Ian_> How did I know that was going to be the next question> Sorry I have no idea. But diffused reading should be less difficult perhaps. Infra Red?
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[21:24] <nik996> radiation could be interesting but the problem i think is always the sensors
[21:24] <Ian_> Spin rate of package?
[21:25] <Ian_> People would always like to be able to control that and measuring it is a good half way house. Synchronising rather than controlling!
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[21:28] <nik996> I think that you can control it easily
[21:28] <nik996> it's not an interesting mesaure
[21:29] <Ian_> I think that controlling spin is an area which a number of people would like to solve simplly.
[21:31] <craag> Yep I would :)
[21:31] <nik996> but it's not a mesure
[21:32] <craag> Will be quite easy to 'measure' from the video
[21:32] <Ian_> mfa298 do you have a larger version of this https://ukhas.org.uk/_media/general:ukhas2015.png?w=200&tok=a218c7 with no background and larger format for UKHAS Conference t-shirt use - standard honey payment rate?
[21:34] <craag> Ian_: I think you're after danielsaul
[21:35] <Ian_> With a slot detector and a knowledge of where the sun was, for example on the previous rotation, it should be possible to not only average the rate between telemetry reports, but also to sync a camera to take a short exposure shot in a given relative direction.
[21:36] <Ian_> Thanks craag. I think last years graphic was produced by Mike and assumed . . .
[21:37] <Ian_> Daniel hangs out on #habhub, I'll give him a ping, Thanks.
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[21:47] <lahyouh> hi all
[21:47] <Upu> evening
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[22:38] <SpacenearUS> New vehicle on the map: 03wb2ljk_chase - 12http://tracker.habhub.org/#!qm=All&q=wb2ljk_chase
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[23:30] <Charlie_> hi :)
[23:31] <craag> Hello
[23:33] <Charlie_> Can I ask if you know any information about building balloons? Or know any resources?
[23:34] <craag> Have you seen the wiki? (Linked in title)
[23:34] <Charlie_> I have seen the pages for the B64 balloons, and was amazed, but I cannot seem to find much information about the construction, materials, etc.
[23:34] <craag> Leo doesn't post up much specific info
[23:35] <craag> but he re-used a lot of the stuff that we have on the wiki
[23:35] <Charlie_> Fantastic, thank you.
[23:35] <Charlie_> I will try and read up some more.
[23:36] <SpeedEvil> http://leobodnar.com/balloons/B-12/
[23:36] <SpeedEvil> and friends
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[23:37] <Charlie_> Thanks Speedevil, I have seen those pages and they are great! But they do not seem to share many specific information. Perhaps I just cannot see it. :)
[23:38] <SpeedEvil> there isn't much
[23:42] <Charlie_> Yes, unfortunately. :(
[23:45] <Charlie_> It is sad to see he has not done any launches in nearly a year too.
[00:00] --- Wed May 13 2015