WSPR-15 support

[neil whiting]

Hi Alan,

I've been receiving on 136kHz recently and one of the modes in use at times is WSPR-15 (ie WSPR with 15 minute period).

The long timescale gives a big increase in sensitivity which helps on LF propagation. However the only program which supports

decoding is the old WSPRX and this has some issues - it doesn't reliably save the .wav files, hence decodes are missed.

Any chance of adding this mode to SparkSDR? I think it just needs the .wav files saving over a 15 minute period and the wsprd calling

on them with the -m option. Plus an option to set the WSPR-15 mode on the WSPR screen. But maybe that's a too simplistic view!

73,

Neil  G4BRK

[Alan Hopper]

Hi Neil,

I'll give that a go, hopefully it should be as easy as you describe.

73 Alan M0NNB

[neil whiting]

Thanks Alan,

I hope so too.

One thing I forget to mention, WSPR-2 uses the 1400-1600Hz "audio" band

whereas WSPR-15 uses 1600-1625. Hope that doesn't make it harder.

73,  Neil  G4BRK

[Alan Hopper]

Hi Neil,

I finally got around to this and am now trying to test it. Just wondered when and where I might catch a signal?

73 Alan M0NNB

[Alan Hopper]

Hi Neil,

I've been trying to find a copy of WSPR-X as I believe it has a sample 15 minute .c2 file that I could check my code with. I have failed to find a download so wondered if you could send me a copy of either the whole program or the sample files.

73 Alan M0NNB

[neil whiting]

Hi Alan,

It's not really the right time of year for WSPR-15 - usually to be found on 136kHz which ismuch more

active in the winter months.

I've attached the .c2 file from the WSPRX release I have.

Not sure where you are located but it might be possible for me to send you a signal over the air if you need it.

However I'm not well equipped with HF TX antennas.

Thanks for your support.

73, Neil  G4BRK

[Alan Hopper]

Hi Neil,

thanks for that, It strangely decodes the same with and without the -m flag so I not quite sure what is happening. If you could send me all of wpsx or a link if you know where it is I can then test locally.

73 Alan M0NNB