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Here are couple of images from GOES 15 via LRIT. Was doing some testing today with 1.2m dish. One is from Himawari-8 but is available via GOES-15 as additional product. https://www.dropbox.com/s/pvrkef4mbm44zv1/hDK01_VIS_160405_0150c.jpg?dl=0...

Sounds good. I guess that sdr-console doesn't run on XP to well?

Which SDR do you have ? Joe

Made a couple of changes to EMWIN decoder to enhance DSP and also faster lock. Here is short video of operation using 1.2m dish and non-optimal circular feed (should be linear for best SNR). https://www.dropbox.com/s/zj36nppqlv4vpz5/enwim_airspy_sample.avi?dl=1 Joe

Also, i have off-pointed my 1.2m dish to see how things work with less signal. Viterbi corrections > 200 will result in loss of lock at a rate that is not very workable. < 200 seems to give pretty good results. Due to the nature of the FEC/differential coding when lock is lost, re-lock is not...

Have you played this file back and it works for you? I tried it and although the signal level is good, SR seems OK, i can't lock to it. Let me know if you can play it back in SDR-Console and feed decoder via UDP successfully and I will look at it again.

What is the normal sample rate for that dongle? Just curious as i can add in support for different sample rates, depending on how far off of 500K they are.... Joe

For those that want a test signal, i am making this recording available: https://www.dropbox.com/s/an5d3uwbaggqbfk/20160331_034952_500000.zip?dl=0 From 1.2m dish. This decodes from start to finish without a single error and should results in viterbi corrections of < 35 with RS always equal to...

AirStreamer outputs 10e6 or 2.5e6 or better said, whatever AirSpy supports. The EMWIN decoder needs 500K so, I either need to give you an older version of airstreamer (command line version) that supports decimation or i need to modify emdwin decoder to also support 2.5e6. That's why I can just...

Sure, let me get this first one done and then I can get you something. You have AirSpy, correct? Joe

Yep, you got it. Joe

OK, so i made some changes - when you are not experiencing some form of interference the viterbi corrections are < 375. This is about as good as it will get with your setup. Here is a screen capture of decoder on your file: this is what it should look like when things are working...

The HDSDR file is about the same quality wise. Has periodic disruption due to noise. There were only 3 files successfully received in that file. The reason is that a graphic was also being transferred and that occupied most of the virtual channel - unfortunately the entire file was not contained...

Which USRP do you have ? Joe

I had time to check the first file. Pretty good. Decoder likes it. It's not error free but again, pretty good. Here are the files that were in that recorded signal: https://www.dropbox.com/s/qcnoqo5b0t0wbrg/weather.7z?dl=0 There was one radar GIF but the recording was not long enough to get it...

Thanks. I will check them out tomorrow. Joe

That does look better to me. Get a recording and I will run it though again. Joe

Did you try rotating the dish to adjust linear polarization? Just curious how that changed the signal. Joe

I think it's somewhere here: http://rtl-sdr.ru/page/vse-dostupnye-na-etom-sajte-plaginy-s-kratkim-opisaniem But might be a special version, i am sure you can find it by asking around (on airspy irc channel). It will give you demod but not decode, but is handy to see quality of signal for QPSK...

If you can get rid of the interference or slightly improve the signal such that each frame decode is like the one in yellow then it will work. Feel free to post another recording if you feel you have improved things. A good signal will look like this...

The recording is OK. The signal is stronger than the one I tested from kt4wo. The decoder will lock periodically, however, it's jut on the edge of being a reliable signal. Here is screenshot from decoder. See the yellow highlighted box? That is a good decode, the SYNC is 1ACFFC1D is correct...

Thanks, will try it out tonight/tomorrow is internet cooperates (i'm traveling). Joe

I don't have direct support for any of those SDRs, but i can suggest to try this: 1) use sdr-console with whichever SDR is best at l-band 2) set sample rate for 500K 3) tune center frequency at 1692.7 (unless your SDR has a spike at 0, then offset by 50KHz (exactly). 4) record IQ file that is a...

What SDR do you have ?

I tried to send it via "conversation" (is that same as message?) but it also triggered the spam prevention and would not allow me to post link. Joe