Difference between revisions of "HAB Tracker Station"

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  |Name=HAB Tracker Station
 
  |Name=HAB Tracker Station
 
  |Status=In progress
 
  |Status=In progress
  |Contact=User:Costyn_van_Dongen
+
  |Contact=User:Costyn_van_Dongen, Maxell, Bertrik_Sikken
 
}}
 
}}
  
Project page for the high altitude balloon tracking/listening station we are setting up in the space.
+
Project page for the high altitude balloon tracking/listening station have set up in the space.
 +
 
 +
== Overview ==
 +
[[File:RevSpaceHABtracker.png|1000px]]
  
 
== Done ==
 
== Done ==
=== Acquired Hardware ===
+
=== 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
+
* "ezcap USB 2.0 DVB-T/DAB/FM" dongle (RTL2838U, Fitipower FC0013 tuner)
 
* VK5QI HABamp
 
* VK5QI HABamp
* Raspberry Pi
+
* Raspberry Pi (+ power supply)
 +
* Antenna: Diamond X-50N
 
* Test payload, RFM22b sending RTTY strings on 434.250MHz. Code here: https://github.com/costyn/rfmtest/blob/master/rfmtest.pde
 
* Test payload, RFM22b sending RTTY strings on 434.250MHz. Code here: https://github.com/costyn/rfmtest/blob/master/rfmtest.pde
  
 
=== Software ===
 
=== Software ===
* Sending test payload --> '''works!'''
+
* 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.
* 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)
+
* gqrx to listen to audio --> '''works!'''
+
* dl-fldigi RTTY decoding --> '''works!'''
+
* Testing VNC performance with gqrx and dl-fldigi --> '''usable with JPEG compression and 8 bits of color'''
+
'''Todo'''
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* Setting up a virtual machine with gqrx and dl-fldigi
+
  
<code>
+
== Todo ==
revspace@habraspi:~$ rtl_tcp -a 10.42.43.20
+
=== Hardware ===
 +
* Earth the antenna, to prevent static buildup
 +
* Install the HABamp
 +
* Test other DVB-T sticks, the mini-R820T could be interesting
 +
* Moar ferrite
 +
* Metal box for some shielding (DIY or [http://dutchrfshop.nl/behuizingen.html])
 +
* If P2000 remains a problem: coaxial stub filter would be a good solution
  
Found 1 device(s).
+
=== Software ===
Found Fitipower FC0013 tuner
+
* Setting up a virtual machine with gqrx and dl-fldigi.
 +
** Blokje told us we could use his machine for permanent setup
 +
*** This requires us to move the [[SpaceSoundSystem]] towards something like a Cubieboard
 +
**** Preferred to setup a complete NAS at the same time, this idea has been floating around for a while too
  
Using ezcap USB 2.0 DVB-T/DAB/FM dongle
+
=== Problems we ran into ===
</code>
+
* As soon as the P2000 tower transmits, it looks like the Fitipower FC0013 overloads, even on lowest gain.
 +
** If the HABamp doesn't fix this we need to test other tuners.
  
[[File:Finaltestonpi.png|800px]]
 
  
== The roof ==
+
=== '''OMG! HUGE SUCCESS!''' ===
* Currently there is no lightning protection installed. We need to figure out how we are going to ground the antenna.
+
* First radio signals have been heard at 16 Feb. 2013.
* POE seems doable, also makes it easy to restart the setup.
+
* The next day we tested Costyn's next payload: the Habanero!
* Penetrating the roof would increase the risk of any leakage
+
** $$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])
** Our best option is to guide the UTP-cable down the drainpipe, in a separate PVC-pipe.
+
  
== Todo ==
+
== Grounding ==
* Currently we have no antenna. Well need some heavy duty (directional?) antenna.
+
** Do we make one or do we buy one?
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** What kind of antenna? (keep in mind we only have line of sight towards south/southwest)
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* Find and buy IP56 enclosure: http://linitx.com/product/13265
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* Obtain 48v PoE injector, make 48v-5v power regulator for inside enclosure.
+
* How do we deal with heat in the summer?
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* Your ideas, we love them!
+
 
+
=== Lightning protection ===
+
 
<pre>
 
<pre>
09:53 < costyn> so guys, how do you ground your antenna's? what the consensus on lightning arrestors?
+
<costyn> so guys, how do you ground your antenna's? what the consensus on lightning arrestors?
09:56 < fsphil> there's so little lightning here I don't bother
+
<fsphil> there's so little lightning here I don't bother
09:57 < costyn> hmm
+
<costyn> hmm
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  
+
<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
                owners that it's safe
+
<SpeedEvil> you need to ground to a separate rod, with a straight cable to it
10:18 < SpeedEvil> you need to ground to a separate rod, with a straight cable to it
+
<SpeedEvil> thick insulated cable
10:20 < SpeedEvil> thick insulated cable
+
<costyn> define thick?
10:20 < costyn> define thick?
+
<gonzo_> you are only going to be able to disipate static with earthing. very little you can do against a direct strike
10:29 < gonzo_> you are only going to be able to disipate static with earthing. very little you can do against a direct strike
+
<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.
10:29 < griffonbot> Received email: NickB "[UKHAS] Re: DL-FLDIGI question"
+
<gonzo_> your typical short colinear is possibly going to be DC short between the centre and braid anyway. (You can test with a DVM)
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  
+
<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
                jump to the outer.
+
<costyn> gonzo_: it'll be a short one yea, Diamond X-50 likely
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)
+
<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
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  
+
<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)
                the existing roof profile? So will not be any greater risk of lightening than anything else
+
<costyn> it's basically a flat roof with some outlets for hvac  
10:34 < costyn> gonzo_: it'll be a short one yea, Diamond X-50 likely
+
<costyn> so no existing metal work. we're thinking of using/making a stand with metal weighted down with tiles
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  
+
<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
                trees around
+
<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
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  
+
</pre>
                the building anyway (or at least the owners metalwork)
+
 
10:35 < costyn> it's basically a flat roof with some outlets for hvac  
+
== Pics ==
10:36 < costyn> so no existing metal work. we're thinking of using/making a stand with metal weighted down with tiles
+
=== Derping around with hardware ===
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  
+
<gallery>
                earth to, or as SpeedEvil said, an earthing rod
+
File:Finaltestonpi.png|One of the first payload tests
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  
+
File:IMAG0857.jpg
                outside of the building, so we'll see</pre>
+
File:IMAG0860.jpg
 +
File:IMAG0864.jpg|The antenna: 'Diamond X-50N'
 +
</gallery>
 +
 
 +
=== Deel 1 ===
 +
<gallery>
 +
File:Zonnecollector Frame 1.jpg|Coax will leave/enter the building trough the little chimney
 +
File:UH4jTew.jpg|The ideal antenna mounting spot; the old zonnecollector
 +
File:4vLbEty.jpg|Enclosure almost ready to rock
 +
File:N2wnt9R.jpg|The magic pipe
 +
File:8CEENu3.jpg|Almost the same as having the Raspi on the roof
 +
File:Sdtd8bY.jpg|Power and network connected
 +
File:LZVCxte.jpg
 +
File:0r5ffXS.jpg|Not sure what happened with the other hole there
 +
File:YRv3kUe.jpg|The smell was't that bad
 +
File:Eqagifp.jpg|It pings!
 +
File:WNtwDZG.jpg|The open pigtail even picks up our payload...
 +
</gallery>
 +
 
 +
=== Deel 2 ===
 +
<gallery>
 +
File:YJkKJx3.png|Without the HABamp the USB cable is a bit short
 +
File:MQWEHh1.png|Coax entering
 +
File:QvAsY3B.png|oh hi
 +
File:RzGxD7t.png|Look at the beautiful stainless steel bolts!
 +
File:LUsffcP.png|Oooooh!
 +
File:4mcwHHD.png
 +
File:XOABzL1.png
 +
File:SaZOJpU.png|The beauty
 +
</gallery>

Revision as of 01:19, 6 March 2013

Project HAB Tracker Station
Status In progress
Contact User:Costyn_van_Dongen, Maxell, Bertrik_Sikken
Last Update 2013-03-06

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

Overview

1000px

Done

Hardware

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.

Todo

Hardware

  • Earth the antenna, to prevent static buildup
  • Install the HABamp
  • Test other DVB-T sticks, the mini-R820T could be interesting
  • Moar ferrite
  • Metal box for some shielding (DIY or [1])
  • If P2000 remains a problem: coaxial stub filter would be a good solution

Software

  • Setting up a virtual machine with gqrx and dl-fldigi.
    • Blokje told us we could use his machine for permanent setup
      • This requires us to move the SpaceSoundSystem towards something like a Cubieboard
        • Preferred to setup a complete NAS at the same time, this idea has been floating around for a while too

Problems we ran into

  • As soon as the P2000 tower transmits, it looks like the Fitipower FC0013 overloads, even on lowest gain.
    • If the HABamp doesn't fix this we need to test other tuners.


OMG! HUGE SUCCESS!

  • First radio signals have been heard at 16 Feb. 2013.
  • The next day we tested Costyn's next payload: the Habanero!

Grounding

<costyn> so guys, how do you ground your antenna's? what the consensus on lightning arrestors?
<fsphil> there's so little lightning here I don't bother
<costyn> hmm
<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
<SpeedEvil> you need to ground to a separate rod, with a straight cable to it
<SpeedEvil> thick insulated cable
<costyn> define thick?
<gonzo_> you are only going to be able to disipate static with earthing. very little you can do against a direct strike
<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.
<gonzo_> your typical short colinear is possibly going to be DC short between the centre and braid anyway. (You can test with a DVM)
<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
<costyn> gonzo_: it'll be a short one yea, Diamond X-50 likely
<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
<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)
<costyn> it's basically a flat roof with some outlets for hvac 
<costyn> so no existing metal work. we're thinking of using/making a stand with metal weighted down with tiles
<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
<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

Pics

Derping around with hardware

Deel 1

Deel 2