Difference between revisions of "HAB Tracker Station"

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Project page for the high altitude balloon tracking/listening station we are setting up in the space.
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Project page for the high altitude balloon tracking/listening station have set up in the space.
  
 
== Overview ==
 
== Overview ==
[[File:RevSpaceHABtracker.png|500px]]
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[[File:RevSpaceHABtracker.png|800px]]
  
 
== Done ==
 
== Done ==
=== Acquired Hardware ===
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=== Hardware ===
* "ezcap USB 2.0 DVB-T/DAB/FM" dongle, RTL2838U, Fitipower FC0013 tuner, Supported gain values (23): -9.9 -7.3 -6.5 -6.3 -6.0 -5.8 -5.4 5.8 6.1 6.3 6.5 6.7 6.8 7.0 7.1 17.9 18.1 18.2 18.4 18.6 18.8 19.1 19.7
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* "ezcap USB 2.0 DVB-T/DAB/FM" dongle (RTL2838U, Fitipower FC0013 tuner)
 
* VK5QI HABamp
 
* VK5QI HABamp
* Raspberry Pi
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* Antenna: Diamond X-50N
* Test payload, RFM22b sending RTTY strings on 434.250MHz. Code here: https://github.com/costyn/rfmtest/blob/master/rfmtest.pde
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=== Software ===
 
=== Software ===
* Sending test payload --> '''works!'''
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* Windows XP, hostname "habtracker", IP 10.42.44.94 (MAC 00:21:70:02:62:0f)
* Sending data from rtl_tcp on RasPi over the network --> '''works!''' (1024000 samples/second seems to go fine when both are on a wired connection)
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** Start the machine with a magic WoL packet: 'wakeonlan -i 10.42.255.255 00:21:70:02:62:0f; ping habtracker'
* gqrx to listen to audio --> '''works!'''
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** VNC: geheim ;-)
* dl-fldigi RTTY decoding --> '''works!'''
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* Testing VNC performance with gqrx and dl-fldigi --> '''usable with JPEG compression and 8 bits of color'''
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'''Todo'''
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* Setting up a virtual machine with gqrx and dl-fldigi
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<code>
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revspace@habraspi:~$ rtl_tcp -a 10.42.43.20
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Found 1 device(s).
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Found Fitipower FC0013 tuner
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Using ezcap USB 2.0 DVB-T/DAB/FM dongle
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</code>
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[[File:Finaltestonpi.png|800px]]
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== The roof ==
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* Currently there is no lightning protection installed. We need to figure out how we are going to ground the antenna.
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* PoE seems doable, also makes it easy to restart the setup.
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* Penetrating the roof would increase the risk of any leakage
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** Our best option is to guide the UTP-cable down the drainpipe, in a separate PVC-pipe.
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=== Shit just got real ===
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<code>18:13 < foobar> Maxell: had xander gevraagd over die plaatsing van een antenne, is geen probleem, mits netjes aangelegd/afgewerkt</code>
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<code>18:13 < foobar> je kan eventueel bij de zonne-collector naar binnen, daar is al een kabelgoot o.i.d.</code>
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<code>18:13 < foobar> komt uit in de wc's boven, kan dan door naar de meterkast, en vanaf daar zijn al ducts naar beneden/kelder</code>
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Getting cables inside the building has huge advantages!
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* Not limited to PoE
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** We feed 230v mains as high as we can, yet keep the last bit 5v DC.
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*** So it's more efficient!
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** Less heat dissipation inside the enclosure on the roof.
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*** So why bother cooling that box?
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* Getting some proper ground connection is now very easy and cheap.
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* Looks much better
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* More vandal-proof
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=== The roof from inside ===
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No obvious cable ducts, there seems to be an open ventilation pipe.
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== Todo ==
 
== Todo ==
* Currently we have no antenna. Well need some heavy duty (directional?) antenna.
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=== Hardware ===
** Do we make one or do we buy one?
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* Earth the antenna, to prevent static buildup
** What kind of antenna? (keep in mind we only have line of sight towards south/southwest) http://www.handelsondernemingveenstra.nl/webwinkel/diamond-50-p-309.html
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* Moar ferrite
** How do we mount it? Something like this:
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* Metal box for some shielding (DIY or be lazy and get something like [http://dutchrfshop.nl/behuizingen.html] or [http://www.velleman.eu/products/list/?id=344206])
http://i.imgur.com/X3xsd.jpg
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with tiles in the corners to weigh it down
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== Pics ==
* Find and buy IP56 enclosure: http://www.conrad.nl/ce/nl/product/531547/Hammond-Electronics-Kunststof-behuizing-IP66-1554KGY-ABS-kunststof-l-x-b-x-h-160-x-90-x-90-mm-Lichtgrijs-RAL-7035/SHOP_AREA_14740&promotionareaSearchDetail=005
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=== Derping around with hardware ===
** How do we deal with heat in the box in the summer?
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<gallery>
* Paint it white, put it in the shade of the sun collector. I don't think we need active heat exchange.
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File:Finaltestonpi.png|One of the first payload tests
* Obtain 48v PoE injector, make 48v-5v power regulator for inside enclosure:  
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File:IMAG0857.jpg
** <s>http://tweakers.net/pricewatch/288179/tp-link-tl-poe150s.html  (injector)</s> We could use the main PoE switch for this.
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File:IMAG0860.jpg
** http://tweakers.net/pricewatch/280388/tp-link-poe-splitter-tl-poe10r.html  (splitter) (or any other IEEE 802.3af compliant splitter)
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File:IMAG0864.jpg|The antenna: 'Diamond X-50N'
* Your ideas, we love them!
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</gallery>
  
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=== Deel 1 ===
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<gallery>
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File:Zonnecollector Frame 1.jpg|Coax will leave/enter the building trough the little chimney
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File:UH4jTew.jpg|The ideal antenna mounting spot; the old zonnecollector
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File:4vLbEty.jpg|Enclosure almost ready to rock
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File:N2wnt9R.jpg|The magic pipe
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File:8CEENu3.jpg|Almost the same as having the Raspi on the roof
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File:Sdtd8bY.jpg|Power and network connected
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File:LZVCxte.jpg
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File:0r5ffXS.jpg|Not sure what happened with the other hole there
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File:YRv3kUe.jpg|The smell was't that bad
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File:Eqagifp.jpg|It pings!
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File:WNtwDZG.jpg|The open pigtail even picks up our payload...
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</gallery>
  
== Grounding ==
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=== Deel 2 ===
<pre>
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<gallery>
09:53 < costyn> so guys, how do you ground your antenna's? what the consensus on lightning arrestors?
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File:YJkKJx3.png|Without the HABamp the USB cable is a bit short
09:56 < fsphil> there's so little lightning here I don't bother
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File:MQWEHh1.png|Coax entering
09:57 < costyn> hmm
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File:QvAsY3B.png|oh hi
09:58 < costyn> we're going to place an antenna on the roof of our hackerspace, but it's not our building and we'll have to convince the
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File:RzGxD7t.png|Look at the beautiful stainless steel bolts!
                owners that it's safe
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File:LUsffcP.png|Oooooh!
10:18 < SpeedEvil> you need to ground to a separate rod, with a straight cable to it
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File:4mcwHHD.png
10:20 < SpeedEvil> thick insulated cable
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File:XOABzL1.png
10:20 < costyn> define thick?
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File:SaZOJpU.png|The beauty
10:29 < gonzo_> you are only going to be able to disipate static with earthing. very little you can do against a direct strike
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</gallery>
10:29 < griffonbot> Received email: NickB "[UKHAS] Re: DL-FLDIGI question"
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10:31 < gonzo_> most lightening arrestors are really just spark gap's, that allow some high voltage coming down the centre of the coax, to
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                jump to the outer.
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10:32 < gonzo_> your typical short colinear is possibly going to be DC short between the centre and braid anyway. (You can test with a DVM)
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10:34 < gonzo_> long colinears are not much of an advantage for HAB use, so I assume it will be a short one. So will not extend much above
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                the existing roof profile? So will not be any greater risk of lightening than anything else
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10:34 < costyn> gonzo_: it'll be a short one yea, Diamond X-50 likely
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10:35 < costyn> gonzo_: and it'll raise some above the roof line, but it's not a high building (2 stories) and there's higher buildings and
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                trees around
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10:35 < gonzo_> not siure of your mounting options, but if mounted to existing metalwork up there, like handrains etc, it will be earthed to
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                the building anyway (or at least the owners metalwork)
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10:35 < costyn> it's basically a flat roof with some outlets for hvac
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10:36 < costyn> so no existing metal work. we're thinking of using/making a stand with metal weighted down with tiles
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10:39 < gonzo_> then an extra ground wire would prob be worth adding. If the building or roof is metal, then that could be an option to
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                earth to, or as SpeedEvil said, an earthing rod
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10:44 < costyn> ok. thanks for the advice. will see what we can do. not even sure if we're going to get permission to route the coax on the
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                outside of the building, so we'll see</pre>
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Revision as of 21:55, 12 May 2013

Project HAB Tracker Station
Status In progress
Contact User:Costyn_van_Dongen, Maxell, Bertrik_Sikken
Last Update 2013-05-12

Project page for the high altitude balloon tracking/listening station have set up in the space.

Overview

800px

Done

Hardware

  • "ezcap USB 2.0 DVB-T/DAB/FM" dongle (RTL2838U, Fitipower FC0013 tuner)
  • VK5QI HABamp
  • Antenna: Diamond X-50N

Software

  • Windows XP, hostname "habtracker", IP 10.42.44.94 (MAC 00:21:70:02:62:0f)
    • Start the machine with a magic WoL packet: 'wakeonlan -i 10.42.255.255 00:21:70:02:62:0f; ping habtracker'
    • VNC: geheim ;-)

Todo

Hardware

  • Earth the antenna, to prevent static buildup
  • Moar ferrite
  • Metal box for some shielding (DIY or be lazy and get something like [1] or [2])

Pics

Derping around with hardware

Deel 1

Deel 2