Re: [Discuss-gnuradio] APT signals

[Bill Tracey]

Berndt,

I can grab some APT audio with a USRP and Bob McGwier's rx apt code.    Or 
are you looking for the raw data coming off the TVRF -- could probably do 
that as well but will need some pointers as to how to grab the raw sample 
off the TVRF card -- suppose one just takes the rxapt python code and hacks 
it to dump to a file sink?

I've also got a Hamtronics R139 I can grab audio from -- although it's 
gotten a bit deaf  of late.  Pics from it can be seen @: 
http://oddjob.yi.org:8888/wxpics/index.html

Regards,

Bill


At 10:44 PM 12/8/2006, Berndt Josef Wulf wrote:
> G'day,
>
> Ok, let's try it this way:
>
> Is there someone with the equipment and time to record APT signals 
> transmitted
> by NOAA satellites in the 137MHz band? Alternatively, geostationary weather
> satellites transmit WEFAX pictures at around 1691MHz (Hey, were are the guys
> that tuned into GPS spectrum which is right next door... :-)
>
> I want to demodulate the AM/FM 2400Hz sub-carrier signal and display the
> image. Currently I'm not in the position to capture the spectrum myself due
> to lack of equipment but this is about to change.
>
> I can provide info on satellite passes and frequencies for your location.
>
> cheerio Berndt
>
> On Wednesday 06 December 2006 14:20, Berndt Josef Wulf wrote:
> > G'day,
> >
> > Has anyone sampled NOAA or METEOR signals in the 137MHz spectrum which they
> > wouldn't mind sharing the spectrum data file(s)?