Difference between revisions of "HAB Tracker Station"

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{{Project
 
{{Project
 
  |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 pagina voor het high altitude balloon tracking/listening station dat we voor de space aan het inrichten zijn.
+
Project page for the high altitude balloon tracking/listening station we are setting 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)
 
* 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
 +
* Antenna: Diamond X-50N
  
 
=== Software ===
 
=== Software ===
* Sending test payload --> '''works!'''
+
* rtl_tcp on RasPi over the network --> '''works!''' (1024000 samples/second seems to go fine when both are on a wired connection)
* 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)
+
* VNC performance with gqrx and dl-fldigi --> '''usable with JPEG compression and 8 bits of color''' (why not SPICE? http://www.spice-space.org/)
* 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'''
+
* Setting up a virtual machine with gqrx and dl-fldigi
+
  
<code>
+
== Todo ==
revspace@habraspi:~$ rtl_tcp -a 10.42.43.20
+
=== Hardware ===
 +
* Get a nice case that will fit the Raspi, ezcap dongle, HABamp and the "SMA <--> N-type" connector.
 +
* Get some sort of antenna mount something like
 +
<center>http://i.imgur.com/X3xsd.jpg</center>
  
Found 1 device(s).
+
=== Software ===
Found Fitipower FC0013 tuner
+
* Setting up a virtual machine with gqrx and dl-fldigi.
 +
** If we are going to use SPICE we could setup a whole new machine. Or at least some sort of Fedora desktop virtual machine.
  
Using ezcap USB 2.0 DVB-T/DAB/FM dongle
+
=== Shit just got real ===
</code>
+
<pre><foobar> Maxell: had xander gevraagd over die plaatsing van een antenne, is geen probleem, mits netjes aangelegd/afgewerkt
 +
<foobar> je kan eventueel bij de zonne-collector naar binnen, daar is al een kabelgoot o.i.d.
 +
<foobar> komt uit in de wc's boven, kan dan door naar de meterkast, en vanaf daar zijn al ducts naar beneden/kelder</pre>
  
[[File:Finaltestonpi.png|800px]]
+
=== '''OMG! HUGE SUCCESS!''' ===
 +
The old geyser's ventilation pipe is still penetrating the roof. Cat5e UTP and 230v at your fingertips.
 +
It looks like we don't need to put our setup on the roof anymore, '''just the antenna'''! The enclosure we are going to use doesn't need to battle mother nature anymore, easy replacement if something breaks, etc, etc.
  
== Todo ==
+
== Grounding ==
 +
<pre>
 +
<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
 +
</pre>
  
* Site survey roof, check if there is already some sort of lightning protection system, and see if we can add some metal construction to it ourselfs
+
=== Pics ===
* Currently we have no antenna. Well need some heavy duty (directional?) antenna.
+
<gallery>
** Do we make one or do we buy one?
+
File:Finaltestonpi.png|One of the first payload tests
** What kind of antenna? (keep in mind we only have line of sight towards south/southwest)
+
File:IMAG0857.jpg|
* Find and buy IP56 enclosure: http://linitx.com/product/13265
+
File:IMAG0860.jpg|
* Routing Ethernet (with PoE) towards the roof, possibly using (something like) this: http://www.ebay.co.uk/itm/200841109556
+
File:IMAG0864.jpg|The antenna: 'Diamond X-50N'
* Your ideas, we love them!
+
</gallery>

Revision as of 23:18, 29 January 2013

Project HAB Tracker Station
Status In progress
Contact User:Costyn_van_Dongen, Maxell, Bertrik_Sikken
Last Update 2013-01-29

Project page for the high altitude balloon tracking/listening station we are setting up in the space.

Overview

1000px

Done

Hardware

Software

  • rtl_tcp on RasPi over the network --> works! (1024000 samples/second seems to go fine when both are on a wired connection)
  • VNC performance with gqrx and dl-fldigi --> usable with JPEG compression and 8 bits of color (why not SPICE? http://www.spice-space.org/)

Todo

Hardware

  • Get a nice case that will fit the Raspi, ezcap dongle, HABamp and the "SMA <--> N-type" connector.
  • Get some sort of antenna mount something like
X3xsd.jpg

Software

  • Setting up a virtual machine with gqrx and dl-fldigi.
    • If we are going to use SPICE we could setup a whole new machine. Or at least some sort of Fedora desktop virtual machine.

Shit just got real

<foobar> Maxell: had xander gevraagd over die plaatsing van een antenne, is geen probleem, mits netjes aangelegd/afgewerkt
<foobar> je kan eventueel bij de zonne-collector naar binnen, daar is al een kabelgoot o.i.d.
<foobar> komt uit in de wc's boven, kan dan door naar de meterkast, en vanaf daar zijn al ducts naar beneden/kelder

OMG! HUGE SUCCESS!

The old geyser's ventilation pipe is still penetrating the roof. Cat5e UTP and 230v at your fingertips. It looks like we don't need to put our setup on the roof anymore, just the antenna! The enclosure we are going to use doesn't need to battle mother nature anymore, easy replacement if something breaks, etc, etc.

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