highaltitude.log.20190605

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[05:52] <Pit[m]> Radiosondy not displaying when feed DFM data with autorx. hmm.
[05:52] <Pit[m]> did they change something?
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[06:04] <SpacenearUS> New position from 03SA6BSS-9 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SA6BSS-9
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[07:42] <SpacenearUS> New position from 03DROP after 0315 hours silence - 12https://tracker.habhub.org/#!qm=All&q=DROP
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[08:13] <SpacenearUS> New position from 03BSS21 after 0318 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BSS21
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[08:28] <SpacenearUS> New vehicle on the map: 03QUB-X - 12https://tracker.habhub.org/#!qm=All&q=QUB-X
[08:32] <fsphil> huh, looks like another launch from Dungannon
[08:33] <fsphil> don't know anything about this one
[08:36] <daveake> It's Balloon Central this week
[08:39] <fsphil> oh I can hear a very odd data mode on 434.4
[08:39] <fsphil> it's like very slow rtty
[08:40] <fsphil> now it sounds more like thor or olivia
[08:41] <fsphil> must be a beacon
[08:47] <SpacenearUS> New vehicle on the map: 03CT2IRR - 12https://tracker.habhub.org/#!qm=All&q=CT2IRR
[08:48] <fsphil> they're up
[08:51] <SpacenearUS> New vehicle on the map: 03QUB-XL - 12https://tracker.habhub.org/#!qm=All&q=QUB-XL
[08:54] <fsphil> can't find any rtty from the hab
[08:54] <fsphil> oh they announced it on the list, how'd I miss that
[08:56] <fsphil> good signal from 434.350
[09:09] <fsphil> a lot of green images
[09:09] <fsphil> we had the same yesterday
[09:09] <fsphil> picam's don't like thick cloud
[09:10] <chris_99> is that due to the white balance
[09:15] <fsphil> I think so, or maybe the moisture on the camera pcb
[09:16] <chris_99> ah, if the output does generally go green, you could record raw, and get 10 bit so a little more room to fiddle with the balance
[09:30] <Darkside> Pit[m]: i still dont know how the DFM callsigns are generated by dxlAPRS so i havent been able to match it
[09:30] <Darkside> Pit[m]: i can't bring myself to dig through its codebase to figure it out
[09:39] <udat> talking to someone about hab on qo-100
[09:39] <udat> https://i.imgur.com/OBSbFiP.png
[09:39] <udat> video and all on the wb transponder :)
[09:41] <fsphil> it's amazing how much the signal can fade when it's almost overhead
[09:42] <udat> yeah seeing a lot on this one
[09:42] <udat> like busses, nothing here for ages then two in two days
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[09:53] <fsphil> 8.4m/s ascent
[09:56] <fsphil> burst?
[09:56] <fsphil> sounds very bursty
[09:56] <fsphil> aye
[09:57] <udat> yeah heard it on coming back in
[09:57] <udat> :)
[09:57] <udat> pulsing
[09:58] <fsphil> heading for some big hills
[10:00] <udat> hiking boots required, it's hammering rain here, wouldn't want to be heading on a hill walk in that
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[10:05] <fsphil> there's a few patches of forest in the area
[10:07] <fsphil> this fading is timed to perfectly drop one or two characters every string
[10:09] <fsphil> rtty's dead
[10:09] <fsphil> oh no!
[10:10] <udat> yup
[10:10] <fsphil> lora too?
[10:10] <udat> lora gone too
[10:11] <fsphil> hopefully it comes back, but that generally doesn't happen
[10:12] <udat> carrier there at least, DF'ing in the hills in the rain fun?
[10:12] <fsphil> I've heard they have a Spot
[10:13] <udat> they fail too
[10:13] <udat> :)
[10:13] <fsphil> yeah, 50/50
[10:13] <udat> :( even
[10:13] <fsphil> good signal to DF with
[10:16] <SpacenearUS> New position from 03BALYOLO after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=BALYOLO
[10:17] <fsphil> should start to lose the signal soon
[10:20] <udat> gone here
[10:22] <fsphil> still strong here
[10:24] <fsphil> here it goes
[10:25] <fsphil> gone
[10:25] <fsphil> not a trace
[10:26] <fsphil> hopefully that spot works, or they saw it come down
[10:35] <udat> hills or trees nearby the hills
[10:40] <SpacenearUS> New position from 03EALoRa after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=EALoRa
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[10:52] <fsphil> looks like they've recovered it
[10:53] <fsphil> wasn't far from a road
[10:55] <fsphil> not sure if it came back when it landed
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[11:25] <G7nsj> Hi All, Of those of you out there that are using an SDR V3 dongle, Could you recommend a suitable aerial preamp ? Thanks.
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[11:34] <Darkside> G7nsj: for which bane?
[11:35] <Darkside> band*
[11:42] <G8DVR> G7nsj> Ebay - LNA PG103+ or SPF8189
[11:43] <G8DVR> but you risk overloading your dongle
[11:43] <Darkside> dfinitely need to wind back teh gain on teh SDR at that point
[11:49] <G7nsj> Its for the Hab tracking i mostly track the weather sondes. The gain of the rx is set to auto in the software of auto_sonde_rx , I am currently building a cavity filter on 400Mhz
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[11:50] <Darkside> ok, for hab flights things like the PGA103 amps are fine. if you want filtering then uputronics filtered amps are good
[11:50] <G7nsj> so i will have antenna then the cavity filter allowing only ~400Mhz then the preamp to the SDR.
[11:50] <Darkside> G7nsj: thats similar to my setup, i use an interdigital filter
[11:52] <Darkside> my rx station is at an amateur repeater site, which is right next to a commercial repeater site
[11:53] <G8DVR> at 400MHz the PGA103 should have 0.5db NF if your cavity has 0.5db loss you now have 1 dbNF
[11:53] <Darkside> thats fine for this kind of stuff
[11:53] <Darkside> radiosondes are not exactly weak signals
[11:56] <G7nsj> at the mo my station is in Oswestry and I can track the sondes from Cornwall and also Newcastle upon Tyne area but I notice I get dropout in sending data to Habhub.
[11:56] <G7nsj> so I am just trying to maximise my antenna system.
[11:57] <Darkside> hmm, how do you mean dropouts?
[11:58] <Darkside> if theres multiple stations uploading telemetry for a single sonde, you will often not see all receiving callsigns show up on habhub at a single time
[11:59] <G7nsj> I see the green line to my station from the sonde then it vanishes at the refresh but will re-appear soo after , some stations I notice dont have this problem
[12:01] <Darkside> its kind of luck of the draw as to what shows up on habhub
[12:01] <Darkside> what happens is all stations upload every 30 seconds, *ideally* synchronised
[12:02] <Darkside> but what usually occurs is one station might upload packet number (as an example) 1000, while another uploads 1001
[12:02] <Darkside> when your browser refreshes, it will onyl show the latest packet (1001)
[12:02] <Darkside> and depending when your browserv refreshes, vs when uploads occur, you end up with what you see
[12:02] <G8DVR> I often get solid green but the sentences dont always get uploaded to the map
[12:02] <G7nsj> I think my aerial could be better positioned as its on the corner of a bungalow, but I am planning to change that , I see what you meamn about the packet order
[12:03] <G8DVR> this is normal!
[12:03] <Darkside> its just a tradeoff of how to handle a very high data rate from the radiosonde, without flooding habitat
[12:03] <Darkside> i wouldnt be concerned about it, so long as your local RX station is showing it rxing OK
[12:03] <G7nsj> its a fascinatin subject and it gives my Raspbery Pi something to do
[12:04] <Darkside> :-)
[12:04] <Darkside> glad you enjoy it
[12:05] <G7nsj> I would like to be able to track the Lora and RTTY Habs isit possibe to do this in a similar fashion , I have a spare raspberry pi and dongle
[12:06] <Darkside> lora habs cant currently be received with a sdr dongle
[12:06] <Darkside> RTTY HABS require manual intervention
[12:06] <Darkside> very difficult to automatically rx and track them like is possible with radiosondes
[12:06] <Darkside> not sayign its impossible, but its not work that has been done by anyone yet
[12:06] <G7nsj> ok, thats as I thought , I have decoded some RTTY ones befor , so at least I know I am on the right track
[12:08] <G7nsj> I do have a Moteino Mega with a RFM96 on 434Mhz , I wondered if I could use that in some way
[12:08] <G8DVR> Your antenna is at the sharp end of the system - make it as high as possible with good co-ax!
[12:09] <G7nsj> my antenna is a 2/70 whip on a discone , I am thinking of building a Slim-Jim as they have good reports
[12:11] <G8DVR> Multi-band Omnis are always a trade off - a dedicated 70cm vertical would be best.
[12:12] <G8DVR> but as Darkside said the sondes are quite strong when above the horizon.
[12:16] <G7nsj> true, the Slim Jim looks good as it has a very low angle of radiation (8Deg) off horizon which would seem good for sondes
[12:22] <G8DVR> Habing isnt really a DX sport, it's more about good signal to noise ratios. A good antenna at the horizon may fail when the HAB is overhead!
[12:25] <G7nsj> yes, well my project for the weekend will be lifting my antenna up above the rooflines.
[12:28] <G8DVR> Good luck, take care, CUAGN>
[12:29] <G7nsj> ok, Thanks for the info/help. 73s G7NSJ
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[12:55] <SpacenearUS> New position from 03U3S33 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=U3S33
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[14:25] <SpacenearUS> New vehicle on the map: 03KD4STH-7 - 12https://tracker.habhub.org/#!qm=All&q=KD4STH-7
[14:26] <SpacenearUS> New vehicle on the map: 03KD4STH-2 - 12https://tracker.habhub.org/#!qm=All&q=KD4STH-2
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[14:34] <SpacenearUS> New vehicle on the map: 03KD4STH-13 - 12https://tracker.habhub.org/#!qm=All&q=KD4STH-13
[14:34] <SpacenearUS> New vehicle on the map: 03KD4STH-3 - 12https://tracker.habhub.org/#!qm=All&q=KD4STH-3
[14:55] <SpacenearUS> New vehicle on the map: 03N8vrn_chase - 12https://tracker.habhub.org/#!qm=All&q=N8vrn_chase
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[15:33] <SpacenearUS> New vehicle on the map: 03KD2KPZ-11 - 12https://tracker.habhub.org/#!qm=All&q=KD2KPZ-11
[15:45] <SpacenearUS> New vehicle on the map: 03N8VRN - 12https://tracker.habhub.org/#!qm=All&q=N8VRN
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[16:09] <SpacenearUS> New position from 03AD4XX-11 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=AD4XX-11
[16:25] <SpacenearUS> New vehicle on the map: 03SP8NCG-4FSK - 12https://tracker.habhub.org/#!qm=All&q=SP8NCG-4FSK
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[17:05] <SpacenearUS> New position from 03DL4AAS-2 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=DL4AAS-2
[17:33] Nick change: pe2bz_ -> PE2BZ
[17:44] <SpacenearUS> New position from 03SA6BSS-9 after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=SA6BSS-9
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[19:46] <SpacenearUS> New position from 03stm32_isen after 036 days silence - 12https://tracker.habhub.org/#!qm=All&q=stm32_isen
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[23:29] <SpacenearUS> New vehicle on the map: 03VK5NE_chase - 12https://tracker.habhub.org/#!qm=All&q=VK5NE_chase
[23:45] <SpacenearUS> New position from 03KD2KPZ-6 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=KD2KPZ-6
[00:00] --- Thu Jun 6 2019