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[aprssig] Fw: ADS-B to APRS Server

Ray Wells vk2tv at exemail.com.au
Sat Apr 26 08:10:44 UTC 2008


Andrew Rich wrote:

> 1. Yes the device is pricey, but for what it does it is very cheap.
> 2. Data rate is around 1 Mb/s
> 3. Modulation type is pulse position modulation.
> 4. Freq = 1090 MHz
>
I take your point.

> You need to be able to program an FPGA and a 40 MHz A/D.
>
Not this little black duck.

> I can't see Brisbane Airport from here.
>
> I loose it at about 150 ft.

Fair enough.

>
> I have just started some more smarts. which shows the coverage map.
>
> Add this into google earth
>
> http://vk4tec.no-ip.org/cgi-bin/adsb_coverage.cgi
>
> As a network link.
>
> It works out the bearing and range of a plane, and updates a table 
> with lat and long if it gets a target further away.
>
>
>
I'll have a look.

Thanks, Ray vk2tv

>
> ----- Original Message ----- From: "Ray Wells" <vk2tv at exemail.com.au>
> To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>
> Sent: Saturday, April 26, 2008 5:48 PM
> Subject: Re: [aprssig] Fw: ADS-B to APRS Server
>
>
>> Andrew,
>>
>> Just back home.
>>
>> That rx is a bit pricey and I don't have any wealthy relatives, 
>> healthy or about to croak!
>>
>> Do you know anything about the data transmission - data rate, 
>> modulation type etc? I guess what I'm getting at here is, is the rx 
>> technology beyond homebrew? A reasonably priced rx might be the road 
>> to some sort of network for increased coverage.
>>
>> Somebody else mentioned tracking a plane going into Brisbane and 
>> losing it at 150ft. I observed the same thing. Is that the height of 
>> Brisbane airport, or do you lose the radio path when they get to that 
>> altitude?
>>
>> Ray vk2tv
>>
>> Andrew Rich wrote:
>>
>>> Ray,
>>>
>>> My Receiver at home
>>>
>>> http://www.tech-software.net/adsb_rx3.jpg
>>>
>>> My Antenna outside
>>>
>>> http://www.tech-software.net/adsb_ant3.jpg
>>>
>>> The data is coming from my antenna.
>>>
>>> I have the video piped out to a CRO, and am trying an ASUS eeepc as 
>>> a test.
>>>
>>> I can also take feeds from other sites, and make the feed availble 
>>> in any format.
>>>
>>> What would be good is a network of receivers.
>>>
>>> The receivers cost $890 from melbourne.
>>>
>>> It has a program that outputs data on port 30003
>>>
>>> You have to have a windows box to talk to the ADSB box.
>>>
>>> That is what I am using on my linux box, taking the data from the 
>>> windows program.
>>>
>>> Got a couple of things happening here,
>>>
>>> APRS feed
>>> Data into MySQL for google earth feeds
>>> Stats are made from MySQL tables of the collected data.
>>>
>>> Cheers
>>>
>>>
>>>
>>> ----- Original Message ----- From: "Ray Wells" <vk2tv at exemail.com.au>
>>> To: "TAPR APRS Mailing List" <aprssig at lists.tapr.org>
>>> Sent: Saturday, April 26, 2008 10:41 AM
>>> Subject: Re: [aprssig] Fw: ADS-B to APRS Server
>>>
>>>
>>>> Andrew,
>>>>
>>>> All very interesting.
>>>>
>>>> Do you have an ADS-B receiver at your place or are you taking a 
>>>> feed from somewhere? Is there any technical data available, now 
>>>> that you've piqued my interest? I'd like to diplay traffic passing 
>>>> through the Kempsey area.
>>>>
>>>> It's interesting to see the southern extent of coverage. For the 
>>>> coastal route it is just north of Grafton, or about 150 miles from 
>>>> Brisbane. For the inland route south, the cut-off is approximately 
>>>> east of Stanthorpe, about 80 miles from Brisbane.
>>>>
>>>> Ray vk2tv
>>>>
>>>>
>>>> Andrew Rich wrote:
>>>>
>>>>>  ----- Original Message -----
>>>>> *From:* Andrew Rich <mailto:vk4tec at people.net.au>
>>>>> *To:* Australian APRS Users <mailto:ozaprs at aprs.net.au>
>>>>> *Sent:* Saturday, April 26, 2008 8:23 AM
>>>>> *Subject:* ADS-B to APRS Server
>>>>>
>>>>> Gudday
>>>>>  I have written an ADS-B to APRS server.
>>>>>  ADS-B is tracking for aircraft.
>>>>>  It runs on LINUX, and uses perl
>>>>>  A socker server listens for connections on port 10151, then 
>>>>> establishes a connection to the ADS-B stream.
>>>>>  Packets are then formed into something that APRS can understand.
>>>>>  You can try it, you should see planes flying around Brisbane.
>>>>>  Simply add "vk4tec.no-ip.org" as an aprs server, and the port is 
>>>>> "10151"
>>>>>  No need to login, actually it just ignores anything sent
>>>>>  Please have a go and let me know if you get it to work for you.
>>>>>  Cheers
>>>>>  Andrew Rich
>>>>> VK4TEC
>>>>>
>>>>> ------------------------------------------------------------------------ 
>>>>>
>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> aprssig mailing list
>>>>> aprssig at lists.tapr.org
>>>>> https://lists.tapr.org/cgi-bin/mailman/listinfo/aprssig
>>>>>
>>>>
>>>>
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