highaltitude.log.20150526

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[00:24] <SpacenearUS> New vehicle on the map: 03VK5QI_chase - 12http://tracker.habhub.org/#!qm=All&q=VK5QI_chase
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[01:40] <SpacenearUS> New vehicle on the map: 03VK5ARG-1 - 12http://tracker.habhub.org/#!qm=All&q=VK5ARG-1
[02:14] <SpacenearUS> New vehicle on the map: 03HORUSLORA - 12http://tracker.habhub.org/#!qm=All&q=HORUSLORA
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[02:26] <Darkside> right, chase car reporting in
[02:27] <fsphil> ooh a horus launch
[02:27] <fsphil> been a while
[02:28] <Darkside> yeah
[02:28] <Darkside> i know right
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[02:28] <Darkside> we're getting ahead of the balloonl
[02:29] <Darkside> launch in maybe 20 min, not sure
[02:30] <Darkside> they're still filling
[02:31] <Darkside> just had a phone call
[02:31] <Darkside> vk5akh: this multiple desktop thing is awesome
[02:32] <vk5akh> aww yah
[02:32] <vk5akh> works wekk
[02:32] <Darkside> yuyp
[02:33] <Darkside> laptop is shaking around a bbit
[02:33] <vk5akh> that is why it has an SSD in it
[02:44] <Darkside> yes..
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[03:08] <PsionicOz> yah I see my QTH in the RX list
[03:10] <PsionicOz> but I dont get on the map :(
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[03:10] <PsionicOz> Darkside: yes multiple desktop thing is awesome
[03:11] <Darkside> oh that ascent rate does not look too good
[03:11] <Darkside> i think they underfilled
[03:11] <Darkside> ngarkat here we come
[03:11] <PsionicOz> Umm.. yes you're in for a long drive my friend !
[03:11] <PsionicOz> pullup pullup... dang it !
[03:12] <Darkside> yup
[03:12] <Darkside> hopefully the ascent rate goes up
[03:12] <Darkside> sometimes its a bit slow at lower altitudes
[03:12] <PsionicOz> dude that is just getting longer and longer... better get the driver to hit the gas.
[03:12] <PsionicOz> opps Accellerator
[03:13] <Darkside> yeah 3m/s not looking good
[03:14] <PsionicOz> dang dude that is just getting worse... VK3
[03:14] <Darkside> yep
[03:14] <Darkside> b ig desert
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[03:14] <Darkside> not good
[03:14] <PsionicOz> yeah we're watching.
[03:15] <Darkside> aim right now will be to figure out the landing point
[03:15] <PsionicOz> better call the VK3's EMDRC
[03:15] <Darkside> and then asserss recovery
[03:15] <PsionicOz> you have a RAV ?
[03:15] <Darkside> ?
[03:15] <PsionicOz> 4WD go anywhere
[03:15] <Darkside> yeah not quite
[03:15] <vk5akh> rav4s do the border track all the time
[03:15] <Darkside> we may have to look at doing HF skeds at some point
[03:15] <vk5akh> rav4 should be good in sand
[03:16] <PsionicOz> drop tire pressure first !
[03:16] <vk5akh> um yeah
[03:16] <Darkside> dont have a compresso
[03:16] <vk5akh> just the day to buy one
[03:16] <PsionicOz> doesn't matter... drop tire pressure on sand.. drive slowly back to nearest town to repump.
[03:17] <PsionicOz> however if it drops in Ngarkat about now... there is a bitumen road between bordertown and pinaroo
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[03:18] <Darkside> the trtick is going to be the burst altitude
[03:18] <Darkside> i need to recalculate
[03:20] <Darkside> mmk 22km burst
[03:20] <Darkside> not too different
[03:23] <PsionicOz> yes this is frightningly familiar this ascent rate
[03:23] <Darkside> yeeeahh
[03:23] <Darkside> not a hwoyee this time tho
[03:24] <PsionicOz> ah ok.. then you've half a chance
[03:28] <Darkside> ok we are going to go down via keith
[03:28] <Darkside> and across
[03:28] <PsionicOz> good choice...
[03:28] <PsionicOz> you're estimating 22km burst ?
[03:31] <Darkside> yeah
[03:31] <Darkside> the burst on the map is 20km
[03:32] <PsionicOz> Darkside: highbury seems to have gone offline
[03:32] <PsionicOz> can't see you're process in htop anymore
[03:32] <Darkside> ok
[03:32] <Darkside> wil check
[03:33] <PsionicOz> k.. BB is watching !
[03:35] <Darkside> fixed
[03:35] <PsionicOz> yep
[03:35] <Darkside> wasnt catching timeouts when uploading to aprs-is
[03:35] <PsionicOz> was watching
[03:35] <PsionicOz> so is a few people from work :)
[03:35] <Darkside> added in some exception code
[03:35] <PsionicOz> ah...
[03:35] <Darkside> so where we're going we wont have 3g coverage
[03:36] <Darkside> when we get out towards the border
[03:36] <Darkside> well, less likely
[03:36] <PsionicOz> ok.. so is the command I see in htop what you use to start it ?
[03:36] <Darkside> so once the balloon is down and we're homing in on its location, we will switch to HF
[03:36] <Darkside> yes
[03:36] <Darkside> python lora_groundstation -p /dev/ttyUSB0 --aprs --habitat
[03:36] <Darkside> will work
[03:36] <Darkside> that should have a .py in it somewhere
[03:36] <PsionicOz> ta.. have copied that in to notepad
[03:36] <Darkside> but i'm now catching all the exceptions
[03:36] <Darkside> so it should be OK now
[03:37] <PsionicOz> yes I saw you editing the script
[03:43] <PsionicOz> Darkside: fuel is cheapest in Tinti if you want to fill up close to the drop zone
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[03:46] <PsionicOz> ah you've stopped at the Shell
[03:46] <plantain> was that the forecast location
[03:46] <PsionicOz> plantain: no.. it's going a little long
[03:47] <PsionicOz> original was just south of Carcuma
[03:53] <Darkside> PsionicOz: you wouldnt happen to have any radio gear at faiths place would you?
[03:53] <Darkside> my IC-70-00 mic has a dicky PTT
[03:55] <Darkside> nvm fixed it
[03:55] <vk5akh> Darkside: take the clam shell apart and check the switch alignment
[03:55] <Darkside> yeah thats the problem
[03:55] <Darkside> ive taken the rocker out
[03:55] <Darkside> i now have direct access to the switch
[03:55] <vk5akh> the"click" sound does not come from the switch
[03:58] <PsionicOz> Darkside: no..
[04:03] <Darkside> its ok
[04:03] <Darkside> i've sorted it out
[04:03] <Darkside> so yes, recovering this may be challenging
[04:03] <Darkside> current plan is try and get the landing location as accurately as possible
[04:11] <Darkside> PsionicOz: this may very well be a mark the landing position and go recover later job
[04:11] <Darkside> you're probably the best placed to recover it
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[04:16] <PsionicOz> Darkside: get as close as you can to the park and sit still and track. Let me see where it goes and I'll advise.
[04:16] <PsionicOz> Darkside: Lora has stopped again.
[04:16] <PsionicOz> process is there but not RX
[04:17] <PsionicOz> could be too far east for me to hear from home
[04:17] <Darkside> ok the lora payload has lots gps lock
[04:17] <Darkside> lost*
[04:17] <PsionicOz> dang... has 18km bug
[04:17] <Darkside> interesting
[04:18] <Darkside> nah, this is only at 13km
[04:18] <PsionicOz> too cold?
[04:18] <PsionicOz> bah who knows
[04:18] <PsionicOz> would explain why it stopped
[04:18] <Darkside> its still transmitting
[04:18] <Darkside> and you are still RXing it
[04:18] <Darkside> its just reporting 0 sats
[04:18] <PsionicOz> habhub is not updating
[04:18] <Darkside> now it appears to have stopped entirely
[04:19] <PsionicOz> probably since it's invalid
[04:19] <PsionicOz> dang it!
[04:19] <Darkside> yeah
[04:19] <Darkside> it wont upload unless it has >4 sats
[04:19] <Darkside> oh wait its still transmitting
[04:19] <Darkside> ut yeah, not decoding well
[04:19] <PsionicOz> k.. sounds like it's frozen
[04:19] <Darkside> something definitely wrong with that payload
[04:19] <Darkside> main telemetry is going fine
[04:19] <PsionicOz> y6upe...
[04:19] <PsionicOz> good old RTTY !
[04:20] <vk5akh> RY RY RY RY
[04:20] <PsionicOz> Faith isn't in Tinti... however we can get more ground crew if you require
[04:20] <PsionicOz> RYRYRYRYRYRYRYRYRYRYRYRYRYRYR
[04:21] <PsionicOz> DE VK5ZM BTW OM !
[04:21] <PsionicOz> K
[04:21] <Darkside> PSE K
[04:22] <Darkside> so now we hope for an early burst
[04:22] <Darkside> which is probably unlikely
[04:22] <Darkside> PsionicOz: any suggestions for RX locastions?
[04:22] <Darkside> or just get as close as possible
[04:23] <PsionicOz> Your in Coonalpyn
[04:23] <Darkside> nearly
[04:24] <Darkside> 4km out
[04:24] <PsionicOz> Your about 45 mins from Keith
[04:24] <Darkside> yeah i dont think we want to go that far south
[04:24] <Darkside> depends when it bursts
[04:24] <Darkside> im thinking iu'm going to wantr to head inland soon
[04:25] <PsionicOz> I'd get to Tinti.... in the middle of town is a cross road.. turn left towards Germanium...
[04:25] <PsionicOz> head out of town to the airport... stop there somewhere and track to ground with a beam if you have one.
[04:25] <Darkside> i have a beam, yes
[04:25] <Darkside> airport is high elevation?
[04:25] <PsionicOz> North of town it's flat and wide open-ish
[04:26] <Darkside> RRR
[04:26] <PsionicOz> https://www.google.com.au/maps/place/35%C2%B052'05.5%22S+140%C2%B004'31.3%22E/@-35.868205,140.075362,968m/data=!3m2!1e3!4b1!4m2!3m1!1s0x0:0x0!6m1!1e1
[04:27] <Darkside> yeah i see the airport on ozi
[04:27] <Darkside> no probs
[04:27] <Darkside> hopefully we get an unclean burst and this thing plummets
[04:27] <Darkside> that'd make things easier..
[04:27] <PsionicOz> looks like it will get to burst
[04:27] <PsionicOz> it's not slowing
[04:28] <Darkside> yeah
[04:30] <Darkside> having problems decoding here
[04:30] <Darkside> lost of fluttering
[04:30] <PsionicOz> it's behind yoyu !
[04:30] <PsionicOz> sorry
[04:30] <Darkside> may have to stop and pull out the yagi
[04:31] <Darkside> VK5ZRL is decoding it well
[04:31] <PsionicOz> ZRL has a good decode keep going and get into position
[04:31] <Darkside> yep
[04:31] <Darkside> now, problem is the predictor is assuming a 5m?s descent
[04:31] <Darkside> its going to be higher than that
[04:31] <Darkside> more like 6-7m/s
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[04:31] <Darkside> or more if the balloon bursts uncleanly
[04:32] <Darkside> cmonnn burst
[04:32] <PsionicOz> Faith is on her way home since the power is out in Meningie until 7:30pm so if you stop and wait you can get a cup of coffee
[04:33] <Darkside> hah
[04:33] <Darkside> cmonnnnnn burst dammit
[04:33] <PsionicOz> Darkside: just in case -35.886465, 140.054224
[04:33] <Darkside> i need to send VK5ZRL a bottle of wine or something
[04:34] <Darkside> PsionicOz: coffee stop?
[04:34] <PsionicOz> yupe
[04:34] <Darkside> cool
[04:34] <vk5akh> we need to get HFC on aprs
[04:34] <PsionicOz> she's only 30 mins out from tinti via the backroads
[04:34] <PsionicOz> we need to get HFC to get her license again
[04:34] <PsionicOz> she's not paid it in a while
[04:35] <PsionicOz> jeezus this thing's still holding on
[04:36] <PsionicOz> ah through the jet stream and slowing down
[04:36] <Darkside> yes much slower up here
[04:37] <PsionicOz> that is good
[04:38] <Darkside> damn, apart from the GPS not working, the other payload is performing increedibly well
[04:38] <Darkside> im decoding it perfectly down here
[04:38] <Darkside> problem is i'm decoding it perfectly, and its saying 0 sats
[04:38] <Darkside> ugh
[04:38] <PsionicOz> humph
[04:38] <Darkside> but yeah, FEC is wonderful
[04:39] <PsionicOz> can you still see it at my place ?
[04:39] <Darkside> uhm
[04:40] <Darkside> hmm some errors
[04:40] <Darkside> strill getting some packets through
[04:40] <Darkside> yeah its decoding still
[04:40] <Darkside> ffs 22.7km
[04:40] <Darkside> burst
[04:40] <Darkside> damit
[04:44] <PsionicOz> on the good side it's getting closer to the bitumen road that goes up the middle
[04:44] <Darkside> yes
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[04:52] <PsionicOz> Darkside: what is this balloon doing... it's just going freakin vertical and fast
[04:52] <PsionicOz> ooh burst !
[04:53] <Darkside> right
[05:00] <PsionicOz> Darkside that payload is recoverable provided it doesn't move too much further east.
[05:01] <Darkside> mmk
[05:01] <Darkside> 4wd track
[05:01] <Darkside> rav4 suitable?
[05:01] <PsionicOz> That N/S track is accessable
[05:01] <PsionicOz> provided you come in from the bottom of the park yes
[05:01] <Darkside> ok
[05:01] <Darkside> tyres?
[05:01] <PsionicOz> The first 300m of that entrance is the toughest
[05:02] <PsionicOz> you can leave your tyres up
[05:03] <PsionicOz> you're in a good spot to receive it too less than 1000m
[05:03] <PsionicOz> like 200-3400
[05:03] <PsionicOz> gah 200-300
[05:03] <Darkside> ok we're heading back to the parks south entrance
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[05:04] <Darkside> http://www.malleehighway.com.au/images/maps/ngarkat-map-large.gifhttp://www.malleehighway.com.au/images/maps/ngarkat-map-large.gif
[05:04] <Darkside> will be entering from the left
[05:04] <Darkside> then going up the north tracfk
[05:04] <PsionicOz> enter from here.. -35.924397, 140.489672
[05:04] <PsionicOz> go north
[05:05] <PsionicOz> Take the Emu Flat Rd coming out of Keith, go behind the show ground and don't miss the left turn off around the dairy's
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[05:06] <Darkside> PsionicOz: what about through mt rescue
[05:06] <Darkside> much more diorect
[05:06] <PsionicOz> -36.074585, 140.433876
[05:07] <PsionicOz> you mean coming in from Coobme
[05:07] <Darkside> theres an entrance fof emu springs road
[05:07] <PsionicOz> ah that is not the place for a RAV
[05:08] <Darkside> oh?
[05:08] <Darkside> humm
[05:08] <PsionicOz> I've been through there recently... deep ruts and exposed roots all the way to the turn off.
[05:08] <Darkside> crap
[05:09] <PsionicOz> much of the veg scrapes my lux
[05:09] <PsionicOz> I'd go down to Keigh on the Hwy and then truck in North.
[05:09] <PsionicOz> keith on the Hwy
[05:09] <PsionicOz> on that track the first 300m is a little soft and the rest is a doddle for a RAV
[05:10] <Darkside> ok matt we need a high spot
[05:10] <PsionicOz> You'll spend 2hrs going through that part of the park.
[05:11] <PsionicOz> There isn't any around there... it's all pretty flat
[05:11] <PsionicOz> there's one hill north of Keith
[05:11] <PsionicOz> but that is about it.
[05:11] <Darkside> ok wont get there in time
[05:11] <Darkside> we are going to wait here
[05:12] <Darkside> and track to ground
[05:12] <PsionicOz> yupe that's what I'd be doing
[05:12] <Darkside> any further we go puts us further away
[05:12] <Darkside> will bring out the beam in a bit
[05:12] <PsionicOz> Coombe is about as far as you can go
[05:13] <vk5akh> Darkside: do you want me to get the SANPCPA guys listening for you on 7.100
[05:14] <Darkside> PsionicOz: its going to land south of box flat
[05:14] <Darkside> fair way away from that north-south track
[05:15] <Darkside> PsionicOz: means we may need to approach from north
[05:15] <PsionicOz> umm... that is coming in hot
[05:15] <Darkside> predicted 7m/s landing rate
[05:15] <Darkside> thats OK
[05:16] <PsionicOz> you might find it easier to go up to Germanium and come back down.
[05:16] <PsionicOz> It's a long way through that park from here.
[05:16] <PsionicOz> there
[05:16] <Darkside> yeah
[05:17] <Darkside> need to head in from the north
[05:17] <PsionicOz> the airport road takes you towards germanium... but mobiles don't work out there at all.
[05:20] <PsionicOz> Darkside: call me when it goes to ground
[05:20] <Darkside> not far away
[05:21] <PsionicOz> no
[05:21] <Darkside> 1.1km
[05:21] <PsionicOz> you should hold it to 200m
[05:21] <PsionicOz> or less
[05:23] <PsionicOz> WTF lora woke up
[05:23] <vk5akh> yeah
[05:24] <Darkside> yeah
[05:24] <Darkside> i just started decoding it
[05:24] <Darkside> thast was on a NR-770HB
[05:24] <Darkside> it decoded it at 246m!
[05:24] <Darkside> tharts awesome
[05:24] <Darkside> RTTY died halfway through another packet
[05:24] <PsionicOz> right well it's down
[05:25] <Darkside> yes
[05:25] <Darkside> -35.68591, 140.39012
[05:25] <Darkside> is the last position i have
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[05:26] <PsionicOz> Darkside: give me a ring on the phone
[05:31] <baird_> Seems there's a geocache nearby: http://geocaching.com.au/cache/gc4ee8h .. Possible access instructions.
[05:31] <baird_> http://www.geocaching.com/geocache/GC4EE8H_jimmys-sandy-hill
[05:34] Nick change: baird_ -> baird
[05:45] <Darkside> baird: yes thats right near it
[05:45] <Darkside> thanks
[05:46] Nick change: fl_0|afk -> fl_0
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[05:47] <Darkside> ok
[05:47] <Darkside> we will be going on th ejimmys well track
[05:50] <PsionicOz> have fun that is a great part of the world.
[05:50] <PsionicOz> Stay safe
[05:53] <Darkside> i will be sitting on 7100
[05:53] <PsionicOz> QSL
[05:54] <Darkside> noise is high with inverter on
[05:54] <Darkside> so will be checking on the half hour
[05:54] <Darkside> strong signals will get over it
[05:54] <Darkside> over the noise
[05:54] <PsionicOz> how about you turn inverter off, call, wait and then resume charging...
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[07:30] <number10> morning
[07:30] <number10> if latest GoT available?
[07:31] <michemto> Morning
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[08:55] <plantain> was Darkside ever heard of again?
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[10:16] <Laurenceb__> http://i.imgur.com/peTwEmj.png
[10:18] <Laurenceb__> asking to be trolled
[10:20] <gonzo_> I'll go and buy a wig
[10:20] <SpeedEvil> I think he actually wants a dog
[10:22] <gonzo_> OK, I'll get a collar instead
[10:22] <daveake> Quite likely he'll get one
[10:23] <gonzo_> (they tend to end uip costing mroe than £25/wk!)
[10:23] <gonzo_> 250
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[11:13] <Laurenceb__> can anyone recommend a program of plotting csv files
[11:13] <adamgreig> gnuplot
[11:13] <Laurenceb__> it has to be n00b friendly, run on win98+, and support multiple y axes and labelling
[11:13] <Laurenceb__> heh so not gnuplot
[11:13] <russss> a spreadsheet
[11:14] <adamgreig> lol yea, excel 98
[11:14] <Laurenceb__> oh
[11:14] <Laurenceb__> and yeah >100M rows
[11:14] <adamgreig> gtfo
[11:14] <Laurenceb__> so not spreadsheets
[11:14] <Laurenceb__> hehe
[11:14] <russss> oh, good luck then
[11:14] <Laurenceb__> ok maybe i dont care if it runs out of ram at that many
[11:14] <Laurenceb__> but it has to support a ton :P
[11:14] <adamgreig> that's what swap is for, but i don't think excel can do that
[11:14] <Laurenceb__> no it fails at 2^16
[11:15] <russss> yeah
[11:15] <russss> I think modern Excel might be able to give it a valiant attempt
[11:15] <adamgreig> 2^15 - 1 or something i thought
[11:15] <adamgreig> but yea no good
[11:15] <Laurenceb__> something like that
[11:15] <Laurenceb__> i tried datplot
[11:15] <Laurenceb__> it does everything i need, but labels are buggy
[11:16] <Laurenceb__> looking for something better
[11:17] <adamgreig> i reckon gnuplot might run on windows
[11:17] <Laurenceb__> yeah
[11:17] <Laurenceb__> hmm
[11:17] <Laurenceb__> maybe i could make a GUI for it
[11:17] <Laurenceb__> in visual basic to track the IP address
[11:17] <adamgreig> lol
[11:18] <Laurenceb__> although actually.. i cant replicate the bugs in datplot on my machine
[11:18] <Laurenceb__> i think they are trying to scroll through labelled plots.. i dont think the labels are intended to do that
[11:19] <Laurenceb__> its not a bug its a "feature"
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[11:25] <Laurenceb__> this looks nice https://kst-plot.kde.org/screenshots/sessions/
[11:25] <Laurenceb__> but not windows
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[12:02] <plantain> looks like darkside did in fact make it out of the wilderness
[12:02] <daveake> I thought he was still in Oz
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[12:05] <LunarWork> hello
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[12:10] <Oddstr13> so, uh, there's gona be a gazillion of fighter jets up and flying
[12:11] <SpeedEvil> Someone needs to launch 99 red balloons
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[13:18] <garymortimer> Ummmm
[13:19] <garymortimer> how do you go about getting a flight KML again? Jackal3 an unplanned launch because its a lovely day
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[13:40] <garymortimer> Ah found it
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[14:27] <day> i ordered a ublox today :3
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[15:09] Nick change: fl_0 -> fl_0|afk
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[15:16] <Lunar_Lander> hello
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[15:44] <michal_f> guys - I created a simple .php file that dynamicaly creates a KML - and it reads fine under google earth on PC
[15:44] <michal_f> even updates realtime
[15:45] <michal_f> is it possible to load this in android's gooogle earth (or maps/chrome) ?
[15:47] <lz1dev> easiest way would be for you to run some simple htt server
[15:47] <lz1dev> http*
[15:47] <michal_f> I've got a hosting with apache
[15:48] <lz1dev> depends on what you are trying to do
[15:48] <lz1dev> if it's just to play with it
[15:48] <lz1dev> you need something simple, like HFS, or if you have python, python -m SimpleHTTPServer
[15:49] <lz1dev> wait
[15:49] <michal_f> I need some simple means of displaying position on map, on my phone
[15:49] <michal_f> and this pos. is changing dynamically
[15:49] <lz1dev> are you saving the KML to disk, or running the php it in a webserver?
[15:49] <michal_f> http://cgarea.com/temp/kml3.kml
[15:50] <michal_f> this is actually a PHP file
[15:50] <michal_f> just with kml extensions
[15:50] <lz1dev> oh, then you just point google earth to that url then
[15:50] <michal_f> it works OK on PC, but not under android
[15:51] <michal_f> I mean I can't add this link to googleEarth on android
[15:51] <lz1dev> you can't from GE, but via a browser when you try to open it
[15:52] <lz1dev> it will ask you with what, and you select GE
[15:52] <lz1dev> also, you might wanna make a wrapper KML and set it to load that URL on a set inverval
[15:52] <lz1dev> take a look at http://tracker.habhub.org/track.kml
[15:53] <michal_f> my chrome just display content of generated KML - I guess I need to find some settings for it to ask what app to use
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[16:02] <lz1dev> you need to send the correct content type header
[16:03] <lz1dev> Content-Type: application/vnd.google-earth.kml+xml\
[16:06] <michal_f> thanks lz1dev
[16:06] <michal_f> will try some more
[16:07] <michal_f> ok, I'm leaving home, thanks again
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[16:14] <Ian_> :) ^ ^ ^ Daddy is delighted
[16:14] <Ian_> Mother is distraught
[16:15] <Ian_> Girlfriend is lumbered
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[16:34] Nick change: fl_0|afk -> fl_0
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[17:05] <N2NXZ> Anyone familiar with WSJT-X ?
[17:15] <tweetBot> @M6EDF: Write up of this weekends test flight of ECC1:
[17:15] <tweetBot> http://t.co/69QFCtUI3z @pitsproject #ukhas #raspi #raspberrypi
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[17:19] <pe1mew> Hi all,
[17:19] Strykar (~wakkawakk@122.169.12.130) left irc: Ping timeout: 244 seconds
[17:19] <pe1mew> Before ordering an NTX2B I was divised to chat here for ordering options. anyone to help ?
[17:19] <pe1mew> devised = advised
[17:20] <adamgreig> UpuWork: ^
[17:20] <Ian_> Mr Upu will be along shortly to advise you
[17:21] <pe1mew> ok, thanks I'll wait a while
[17:21] <Ian_> This is traditional tea time, so he might be eating presently
[17:21] <pe1mew> all fine...
[17:22] Action: pe1mew continues stdudying
[17:23] <Upu> hello
[17:23] <prog> hello Upu
[17:23] <prog> I replied to UpuWork
[17:23] <Upu> hey prog
[17:26] <Ian_> Upu, you copied the request from pelmew [18:19} ?
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[17:27] <Upu> rgr dealt with thx
[17:27] <Upu> cheers for ping
[17:27] <Ian_> :)
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[17:40] <pe1mew> have a nice evening. Other thing occupy me tonight. bye
[17:41] <Lunar_Lander> hi Upu :) I felt free to link your nmea parsing tutorial to the rocket group, hope that was OK :)
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[17:41] <Upu> no problems at all
[17:41] <Upu> I should finish it really
[17:42] <Lunar_Lander> ah, what do you plan to add?
[17:43] <Upu> dunno in my head its not completed
[17:43] <Upu> I'll check
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[17:49] <Lunar_Lander> ah
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[18:09] <Reb-SM3ULC> evening!
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[19:52] <jet__> Hi, I was wondering, in the event that a balloon requires, say, 4.5 cubic metres of helium gas
[19:53] <jet__> Is it OK to rent two canisters of helium, a medium and a small one?
[19:53] <jet__> Is that standard practice when the helium required goes over the requirement of one canister?
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[19:54] <adamgreig> it's doable
[19:54] <adamgreig> little faff swapping
[19:54] <adamgreig> but not a huge deal
[19:54] <daveake> It's fine but costs more and is more hassle
[19:54] <jet__> So should I just buy the jumbo?
[19:54] <daveake> Well the BOC jumbo is very heavy
[19:54] <jet__> It's actually cheaper, but I'd be wasting a lot of money
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[19:55] <daveake> I'd get an Air Products cylinder instead if possible
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[19:56] <jet__> I heard they have an inbuilt regulator. Apart from that, how are they different? And where do you get them?
[19:56] <jet__> Plus, the balloonhelium jumbo, I'd be wasting almost half of the helium. I emailed them asking if they can refund me for the leftover helium and they said no, it goes to waste
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[20:00] <jet__> I contacted air products and they were very vague about how I actually get the helium
[20:02] <daveake> click4balloons.co.uk
[20:02] <daveake> http://www.click4balloons.co.uk/n20-helium-canister-hire-local-collection-across-uk-21026-p.asp
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[20:03] <jet__> That looks nice
[20:03] <daveake> 5.4m^3 iirc
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[20:05] <Vaizki> 90 day rental period included.. wow..
[20:05] <Vaizki> in Finland we might get.. a week.
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[20:06] <jet__> That's amazing, I didn't see that place
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[20:06] <jet__> Do those cylinders require any regulators or special adapters? How do you connect them?
[20:06] <daveake> Comes with a regulator valve
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[20:07] <daveake> !wiki balloon filler
[20:07] <SpacenearUS> 03daveake: Wiki page 03balloon_filler (ideas) - 12http://ukhas.org.uk/ideas:balloon_filler
[20:07] <daveake> !wiki fill tube
[20:07] <SpacenearUS> 03daveake: Wiki page 03fill_tube (guides) - 12http://ukhas.org.uk/guides:fill_tube
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[20:11] <jet__> Thanks. I'll get one of those, they are better suited to the requirements of our launch
[20:11] <jet__> !dial cheapo
[20:11] <SpacenearUS> 03jet__: Can't find a flight doc matching your query
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[20:34] <Laurenceb_> eroomde: so I thought of a simple way to get to 100km from a balloon
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[20:34] <Laurenceb_> a big cannon
[20:36] <SpeedEvil> It's not that big.
[20:37] <Laurenceb_> well yes, <400grams with carbon fibre
[20:38] <SpeedEvil> What's the peak pressure when you light 10MP of mix
[20:41] <Laurenceb_> about 7 times
[20:42] <Laurenceb_> according to http://www.thehalls-in-bfe.com/GGDT/, 10MPa air/propane gets a 20gram payload to 1.25km/s with a 1m, 2.5cm diameter barrel
[20:43] <Laurenceb_> enough to get to 110km from ~35km
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[20:45] <SpeedEvil> Now, given a 35mm diameter, how much does performance improve if you extend the tube another 100mm down and stick a rocket in it
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[20:46] <Laurenceb_> a rocket firing things out of a tube?
[20:47] <SpeedEvil> no, I was meaning if you put a rocket under the launcher to get it to ~45km
[20:48] <Laurenceb_> heh
[20:48] <Laurenceb_> air drag is quite insignificant at ~35km
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[20:49] <SpeedEvil> I guess
[20:49] <gonzo_nb> that equates to 300grains going 4000fps. That's repectable if it were a rifle
[20:49] <gonzo_nb> that would be an elephant gun
[20:49] <SpeedEvil> I assume that 70MPA hydrogen doesn't work?
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[20:50] <SpeedEvil> wsith no combustion
[20:50] <SpeedEvil> (neglecting the valve issue)
[20:50] <SpeedEvil> ah - no
[20:50] <Laurenceb_> getting gasses to any of these pressures is a pita
[20:51] <Laurenceb_> i need to read how armadillo aerospace made their helium compressor
[20:53] <SpeedEvil> err - 10MPa is 100 bar is 1400PSI
[20:53] <SpeedEvil> don't you just not bother and get it out of a cylinder
[20:53] <SpeedEvil> As tehy're delivered at ~3000
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[20:55] <Laurenceb_> yes
[20:56] <gonzo_nb> a good old .303 rifle will be of the order of 33ton/squinch
[20:59] <Laurenceb_> found it
[20:59] <SpeedEvil> IWhich is about right
[20:59] <Laurenceb_> http://www.nuvair.com/booster-haskel.shtml
[20:59] <Laurenceb_> thats what armadillo use
[20:59] <SpeedEvil> that pressure is ~10* that of the device mentioned above, and 1/10th the area
[20:59] <Laurenceb_> *used
[21:00] <Laurenceb_> maximum outlet pressure to 20,000 psi
[21:00] <Laurenceb_> holy shit
[21:02] <SpeedEvil> Outlet PSI to dollar ratio 0.5
[21:06] <Laurenceb_> so a 1.5Kg H2 filled LGG could fire a 100gram projectile at 1.3km/s
[21:09] <SpeedEvil> you mean 1.5kg of charge, or 1.5kg of barrel
[21:09] <SpeedEvil> well - total
[21:09] <SpeedEvil> Because that sounds really respectable as a firearm if nothing else.
[21:10] <Laurenceb_> total
[21:10] <Laurenceb_> using 20kpsi H2
[21:10] <SpeedEvil> that seems suspiciosuly good
[21:15] <Laurenceb_> tadaaa
[21:15] <Laurenceb_> http://www.ebay.co.uk/itm/Hydraulics-International-Air-Driven-Gas-Booster-Pump-/171798200544?pt=LH_DefaultDomain_3&hash=item27fff880e0
[21:16] <SpeedEvil> Is that with unheated H?
[21:17] <SpeedEvil> max output 3400
[21:17] <Laurenceb_> yes unheated
[21:17] <Laurenceb_> yes but if you used that with H2/O2...
[21:17] <Laurenceb_> eeek
[21:18] <SpeedEvil> that seems likely to be very entertaining
[21:18] <SpeedEvil> 'you say your pumps are oxygen safe - what about stochiometric H2/O2?'
[21:18] <SpeedEvil> 'warranty void'
[21:23] <Laurenceb_> 4.6km/s with 25grams
[21:24] <Laurenceb_> thats orbital insertion scale
[21:25] <adamgreig> if you can make a payload that survives that
[21:25] <adamgreig> i guess once it's embedded as a solid slug.. :p
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[21:26] <Laurenceb_> thats with a 6m barrel
[21:26] <Laurenceb_> max accel 20kG
[21:27] <adamgreig> 20kG
[21:27] <adamgreig> lol
[21:27] <adamgreig> gl;hf
[21:27] <adamgreig> hope you weren't planning to use a quartz crystal for your radio transmitter
[21:28] <Laurenceb_> these things are complicated
[21:28] <Laurenceb_> max pressure is one thrid of the way down the barrel
[21:28] <Laurenceb_> looks like slowish burn time + reflected shock waves
[21:29] <adamgreig> weird
[21:29] <adamgreig> when you say 'slowish'..
[21:29] <Laurenceb_> adding a very strong burst disc gives improved performance
[21:30] <Laurenceb_> due to better burn
[21:30] <Laurenceb_> tho im not sure how accurate this sim code is, it only seems to have been tested up to ~1km/s
[21:31] <Laurenceb_> very educational for engine design - now i see why multiple sparkplugs helps
[21:33] <Laurenceb_> http://www.dtic.mil/dtic/tr/fulltext/u2/a462130.pdf
[21:38] <Lunar_Lander> good night :)
[21:40] <SpeedEvil> Laurenceb_: did you see that insane russian diesel sim?
[21:40] <Laurenceb_> ah yeah
[21:40] <Laurenceb_> havent tried to run it
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[21:40] <SpeedEvil> me neither
[21:40] <SpeedEvil> it's the sort of thing that would be amzingly awesome if you were designing a diesel engine
[21:42] <Laurenceb_> thankyou captain obvious :P
[21:42] <SpeedEvil> :)
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[00:00] --- Wed May 27 2015