On 12/01/2019 18:36, Jan Panteltje wrote:
[]
> A yagi that is impressive! I just use the simple antenna that came with the
DVB-T stick.
> As height is relative to receiver, or covered distance is 4.( sqrt(height1) +
sqrt(height2) )
> my height at ground level has no effect on a plane that is at 30000 feet...
eehh 10 km eh...
> The stick is omni directional.
> You then get this:
>   http://panteltje.com/pub/xgpspc_5_planes.gif
> dump1090 with a bit of extra processing...
>
>
>
> I was beamed down in the Netherlands, and they told me I was an earthling,
> for the rest ?
>
> I schools here they were quite active teaching languages
> French, English, German, and Dutch, French started at kindergarten already.
> I spend quite some time in the UK and US, so that makes English even easier
for me.
>
> root@raspberrypi:~/compile/pantel/xgpspc# uptime
>   19:15:20 up 11 days,  7:37,  9 users,  load average: 2.53, 2.84, 2.88
>
> root@raspberrypi:~/compile/pantel/xgpspc# temperature
> temp=55.7'C
>
> That raspi also has  GPS / GLONASS module on its serial port /dev/ttyAMA0
> root@raspberrypi:~/compile/pantel/xgpspc# cat /dev/ttyAMA0
> 13,14,3519,18,043,12,22,04,338,,24,35,140,20*70
> $GPGSV,4,3,13,25,67,266,30,29,24,197,25,31,08,304,17,32,40,275,18*79
> $GPGSV,4,4,13,39,10,116,*46
> $GPGLL,5315.07733,N,00535.97261,E,183315.00,A,A*6E
> $GPRMC,183316.00,A,5315.07763,N,00535.97283,E,0.676,,120119,,,A*70
> $GPVTG,,T,,M,0.676,N,1.253,K,A*21
> $GPGGA,183316.00,5315.07735.97283,E,1,08,0.97,-4.8,M,45.7,M,,*70
> $GPGSA,A,3,24,02,29,19,25,32,12,14,,,,,1.97,0.97,1.71*03
> $GPGSV,4,1,13,02,26,106,19,03,04,357,,06,25,066,,12,74,067,16*76
> $GPGSV,4,2,13,14,35,300,21,19,18,043,12,22,04,338,,24,35,140,20*70
> $GPGSV,4,3,13,25,67,266,30,29,24,197,24,31,08,304,17,32,40,275,18*78
> $GPGSV,4,4,13,39,10,116,*46
> $GPGLL,5315.07763,N,00535.97283,E,183316.00,A,A*64
> $GPRMC,183317.00,A,5315.07766,N,00535.97253,E,0.397,,120119,,,A*73
> $GPVTG,,T,,M,0.397,N,0.735,K,A*2F
> ...
> etc etc...
> Wrote the decoding software for that too.
>
> I also run a server for the image (as above) on this raspi,
> and wrote an app for the PC that records with ffmpeg to H264 as movie all day
long,
> that is my main log now... all data included, just play back fast forward...
> Some shipping AIS is also logged as text file on the raspberry though.
>
> Old raspi, one of the first 'B', single processor, only 2 USB connectors.
> It also logs CO level, and temperature + humidity, air pressure, all in the
movie it makes.
> Easy way out..... video log :-)
>
>> --
[]

> As to 'sat signal' I am (radio ham license) working on receiving the Es'hail
2  geostationary satellite
> ham radio transmitter, was just launched a few weeks ago by SpaceX, now
moving to its final position.
> Movable 87 cm motorized dish.
>
> OK, posting gets long...

Yes, but I often get asked "What do you do with the Raspberry Pi?" (as
if there's just one!) so having the  Web page shows at least a few of
the things which interested me.  I'm also following Es'hail 2, but dish
space here is limited, so likely it will be the Web SDR (at Goonhilly,
England) for me.  It's interesting to see people tracking the Doppler -
at least during the transition.  There's a lot on Twitter, with some
folks thinking of using the Raspberry Pi as a basis for transmitting.

What matters mostly for your ADS-B antenna is height - how clear of
local obstructions you can get.  As you note, both ADS-B and AIS
decoding are ideal for the Raspberry Pi.

You do sound to have similar interests (although off-topic here), so you
may like to join the PlanePlotter and ShipPlotter groups, and perhaps
make a contribution.

   http://groups.io/g/planeplotter
   http://groups.io/g/shipplotter

73,
GM8ARV
--
Web: http://www.satsignal.eu

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