highaltitude.log.20200727

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[02:23] <SpacenearUS> New position from 03KM6BWB-10 after 0321 hours silence - 12https://tracker.habhub.org/#!qm=All&q=KM6BWB-10
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[07:27] <SpacenearUS> New position from 03KN4IUD-15 after 03a month silence - 12https://tracker.habhub.org/#!qm=All&q=KN4IUD-15
[07:39] <SpacenearUS> New vehicle on the map: 03PD3T__chase - 12https://tracker.habhub.org/#!qm=All&q=PD3T__chase
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[10:27] <SpacenearUS> New position from 03WSP2 after 039 days silence - 12https://tracker.habhub.org/#!qm=All&q=WSP2
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[11:07] <SynQweb> hi there
[11:07] <SynQweb> any uputronics staff here? :)
[11:09] <jarod> Upu ? :)
[11:09] <SynQweb> I'm trying to get in toch :)
[11:09] <SpacenearUS> New position from 03BB10 after 0313 hours silence - 12https://tracker.habhub.org/#!qm=All&q=BB10
[11:11] <Darkside> SpacenearUS: im sure your best bet would be to email...
[11:11] <SynQweb> ok, Anthony is probably up in a balloon somewhere :P
[11:11] <Darkside> or at work
[11:12] <SynQweb> is UPU a side-business?
[11:34] <craag> It's a small part of his business. He'll reply to emails when he gets the chance.
[11:45] <SynQweb> I already got in touch :)
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[12:10] <SpacenearUS> New vehicle on the map: 03SP3BMJ-12 - 12https://tracker.habhub.org/#!qm=All&q=SP3BMJ-12
[12:17] <SpacenearUS> New position from 03PS-76 after 032 days silence - 12https://tracker.habhub.org/#!qm=All&q=PS-76
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[13:09] <SpacenearUS> New position from 03IT9FKM after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=IT9FKM
[13:15] <SpacenearUS> New position from 03N6CVO-13 after 0316 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N6CVO-13
[13:27] <SpacenearUS> New position from 03N6JED-13 after 0311 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N6JED-13
[13:53] <SpacenearUS> New position from 03N4XWC-1 after 0312 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[16:54] <SpacenearUS> New vehicle on the map: 03SKY01_Chase - 12https://tracker.habhub.org/#!qm=All&q=SKY01_Chase
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[18:20] <SpacenearUS> New vehicle on the map: 03F4igg_chase - 12https://tracker.habhub.org/#!qm=All&q=F4igg_chase
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[19:43] <SpacenearUS> New position from 03VK2HAB-11 after 03a day silence - 12https://tracker.habhub.org/#!qm=All&q=VK2HAB-11
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[20:02] <JohanM> Hello all, I have a question.
[20:03] <JohanM> If I look at the HabHub tracker map and I see a balloon there is a green and a blue circle around it. What is the distance from the balloon to those circles?
[20:04] <bertrik> ah, that is an easy question with a clear answer! :D
[20:04] <bertrik> the blue circle is the so-called radio horizon
[20:04] <JohanM> Think so but I don't know. I am to this. ;D
[20:05] <JohanM> I mean new to this hobby.....
[20:05] <bertrik> that's as far as the balloon can 'see' limited by the curvature of the earth, depending on the altitude, and anyone inside the circle should be able to see the ballon
[20:06] <JohanM> Ok Bertrik thats ok for me. Just see a balloon in SP Poland and the blue circle covers my area.
[20:06] <bertrik> the green line is a similar circle, just not at 0 degree, but 5 degrees (or so) above the horizon
[20:07] <bertrik> so if you're inside the blue circle, you have a reasonably good chance of receiving the balloon telemetry
[20:07] <bertrik> and if you're inside the green circle, and you DON'T receive it, your receiver is pretty deaf :)
[20:07] <JohanM> Understand it. So lets keep a eye if I can receive something in the next hour.
[20:08] <bertrik> JohanM: what kind of receiver do you have? and what kind of antenna?
[20:09] <JohanM> Yesterday I install the IMG file and run it now on a Raspberry. I am a long time a radio operator but never was involved in this kind of hobby.
[20:11] <bertrik> with an rtl-sdr you can probably see the balloon in the waterfall
[20:11] <JohanM> RTL-SDR dongle V3 and the ant is a vertical for the moment. But my location is not that good. It is a small city, I am close to the centre so pretty much a lot of qrm around me.
[20:11] <JohnLaidler_> You need line of sight to the horizon with no buildings in the way. Not sure about trees but if you are on the limit they won't help.
[20:11] <bertrik> people often use a band filter with it, to limit out-of-band interference
[20:13] <JohanM> Yes I need that to, but because this is my second day to watch this I have to do some work to get the RX and ant a bit better.
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[20:13] <bertrik> at our hacker space we used a colinear antenna + band filter + rtlsdr to track balloons, worked ok
[20:13] <bertrik> and dl-fldigi as the decoder software
[20:13] <JohanM> band filter build by yourself?
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[20:14] <bertrik> no
[20:15] <JohanM> Can you take the audio from the PI from the balloon to a W10 computer, because I run dl-fldigi on that computer.
[20:16] <bertrik> there's rtl-tcp that can forward the data over a network
[20:16] <SA6BSS-4> better just put the rtl-stick in the computer
[20:16] <SA6BSS-4> or what betrik said :)
[20:16] <bertrik> and sdrsharp supports that too, but I don't know how well it really works in practice
[20:17] <SA6BSS-4> JohanM: you are scanning for wx weather sonders ?
[20:17] <bertrik> (I *think*)
[20:17] Nick change: SA6BSS-4 -> SA6BSS-Mike
[20:18] <JohanM> Ok thanks for the sugestion, will take a look at it also. But like to find out first what I can do with this set-up.
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[20:19] <bertrik> IIRC the band filters helps a lot, to keep out other signals, the rtlsdr by itself has a wideband input and limited resolution
[20:19] <JohanM> WX and amateur ballooning both are ok for me on this moment. Because I like to update my performance of the station would like to see signals so I can see that mu changes will work.
[20:21] <JohanM> Ok found IIRC band filter via google, going to read that and I think it will help.
[20:22] <JohanM> Also am involved in SATNOGS project and also need there a filter for UHF.
[20:22] <SA6BSS-Mike> got a rs41 this morning, long time since last :)
[20:22] <SA6BSS-Mike> https://imgur.com/w3bLjAn
[20:23] <bertrik> JohanM: I think we used this https://store.uputronics.com/index.php?route=product/product&product_id=53
[20:23] <JohanM> (y) Good work Mike.
[20:23] <SA6BSS-Mike> tnx :) fun fun before work started
[20:25] <JohanM> Looks good Bertrik, but I need to be carrefully with a LNA because I have a inband TX low power very close to my house who is 24/7 on air.
[20:26] <JohanM> It is not legal and we agree that they switch of when they not use it. But they forget it often. =(
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[20:34] <SpacenearUS> New position from 03PS-76 after 038 hours silence - 12https://tracker.habhub.org/#!qm=All&q=PS-76
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[23:12] <SpacenearUS> New position from 03N4XWC-1 after 039 hours silence - 12https://tracker.habhub.org/#!qm=All&q=N4XWC-1
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[00:00] --- Tue Jul 28 2020