Difference between revisions of "HAB Tracker Station"

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(Done)
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== Overview ==
 
== Overview ==
[[File:RevSpaceHABtracker.png|1000px]]
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[[File:RevSpaceHABtracker.png|800px]]
  
 
== Done ==
 
== Done ==
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* "ezcap USB 2.0 DVB-T/DAB/FM" dongle (RTL2838U, Fitipower FC0013 tuner)
 
* "ezcap USB 2.0 DVB-T/DAB/FM" dongle (RTL2838U, Fitipower FC0013 tuner)
 
* VK5QI HABamp
 
* VK5QI HABamp
* Raspberry Pi (+ power supply)
 
 
* Antenna: Diamond X-50N
 
* Antenna: Diamond X-50N
* Test payload, RFM22b sending RTTY strings on 434.250MHz. Code here: https://github.com/costyn/rfmtest/blob/master/rfmtest.pde
 
  
 
=== Software ===
 
=== Software ===
* The raspi running rtl_tcp can do around 2MS/s, and you can connect with it on habraspi.space.revspace.nl:1234. Make sure you use a wired connection, or else the latency and overall experience will be horrible.
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* Windows XP, hostname "habtracker", IP 10.42.44.94 (MAC 00:21:70:02:62:0f)
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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'
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** VNC: geheim ;-)
  
 
== Todo ==
 
== Todo ==
 
=== Hardware ===
 
=== Hardware ===
 
* Earth the antenna, to prevent static buildup
 
* Earth the antenna, to prevent static buildup
* Install the HABamp
 
* Test other DVB-T sticks, the mini-R820T could be interesting
 
 
* Moar ferrite
 
* Moar ferrite
* Metal box for some shielding
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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])
* If P2000 remains a problem: coaxial stub filter would be a good solution
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=== Software ===
 
=== Software ===
* Setting up a virtual machine with gqrx and dl-fldigi.
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* Replace the Raspberry Pi with the desktop.
** Blokje told us we could use his machine for permanent setup
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** We should make a nice metal(!) enclosure for the dongle and habamp first, to prevent going up there twice.
*** This requires us to move the [[SpaceSoundSystem]] towards something like a Cubieboard
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**** Preferred to setup a complete NAS at the same time, this idea has been floating around for a while too
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=== Problems we ran into ===
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* As soon as the P2000 tower transmits, it looks like the Fitipower FC0013 overloads, even on lowest gain.
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** If the HABamp doesn't fix this we need to test other tuners.
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=== '''OMG! HUGE SUCCESS!''' ===
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* First radio signals have been heard at 16 Feb. 2013.
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* The next day we tested Costyn's next payload: the Habanero!
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** $$HABANERO,41,15:09:39,52.0647,+4.3642,45,7,6,16,23,4.15*AE4C ([https://maps.google.nl/maps?q=52.0647,%2B4.3642&hl=en&ll=52.064739,4.364579&spn=0.00092,0.002642&sll=52.469397,5.509644&sspn=1.867323,5.410767&t=m&z=19&iwloc=near GPS location on Google Maps])
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== Grounding ==
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<pre>
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<costyn> so guys, how do you ground your antenna's? what the consensus on lightning arrestors?
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<fsphil> there's so little lightning here I don't bother
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<costyn> hmm
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<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 owners that it's safe
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<SpeedEvil> you need to ground to a separate rod, with a straight cable to it
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<SpeedEvil> thick insulated cable
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<costyn> define thick?
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<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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<gonzo_> most lightening arrestors are really just spark gap's, that allow some high voltage coming down the centre of the coax, to jump to the outer.
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<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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<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 the existing roof profile? So will not be any greater risk of lightening than anything else
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<costyn> gonzo_: it'll be a short one yea, Diamond X-50 likely
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<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 trees around
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<gonzo_> not siure of your mounting options, but if mounted to existing metalwork up there, like handrains etc, it will be earthed to the building anyway (or at least the owners metalwork)
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<costyn> it's basically a flat roof with some outlets for hvac
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<costyn> so no existing metal work. we're thinking of using/making a stand with metal weighted down with tiles
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<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 earth to, or as SpeedEvil said, an earthing rod
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<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 outside of the building, so we'll see
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</pre>
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== Pics ==
 
== Pics ==

Revision as of 01:29, 21 April 2013

Project HAB Tracker Station
Status In progress
Contact User:Costyn_van_Dongen, Maxell, Bertrik_Sikken
Last Update 2013-04-21

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])

Software

  • Replace the Raspberry Pi with the desktop.
    • We should make a nice metal(!) enclosure for the dongle and habamp first, to prevent going up there twice.

Pics

Derping around with hardware

Deel 1

Deel 2