Re: [Discuss-gnuradio] HRPT receiver

[Patrik Tast]

Hi Marcus,

APT is (analogue) FM BW ~35-40 kHz and HRPT BW 3 MHz digital.
Using a RTLSDR to receive APT can also be found here using windows
http://www.poes-weather.com/rtl-sdr/
and howto build a good antenna (RHCP) @ 137 MHz here
http://www.poes-weather.com/download/jm-dca/

Patrik



On Tue, 2014-02-25 at 09:58 +0100, Marcus Müller wrote:
> Hi Pablo,
> 
> Googling "Noaa image format" instantly yielded:
> http://commons.wikimedia.org/wiki/File:NOAA_APT_Frame_Format.gif
> http://www.sat.dundee.ac.uk/hrptformat.html
> 
> It's already been done a few times - for example like this (really
> just googling "GNU Radio NOAA image decode" and clicking the first
> thing away...)
> http://www.oz9aec.net/index.php/gnu-radio/gnu-radio-blog/350-noaa-weather-satellite-reception-with-gnu-radio-and-usrp
> but here, Alexandru Csete used a GNU Radio-Based flowgraph just to
> record the received signal to a Wav file and process it via atpdec
> http://atpdec.sourceforge.net/
> and, honestly, how cool would it be if you wrote a small piece of GNU
> Radio software that had a signal sink, which used the atpdec code and
> displayed images in a window? (Hint: awesome).
> 
> So: 
> Happy Hacking,
> Marcus
> 
> On 02/25/2014 09:38 AM, Pablo Fernández Alonso wrote:
> 
> > Hello,  
> > 
> > 
> > I was wondering if someone can receive hrpt images from NOAA
> > satellites or similar, if so, could you help me with the
> > implementation of the receiver? There is not quite information about
> > that format, so if you could help me I would really appreciate it.
> > 
> > 
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