Hi Mike,

Got you:

DK7FC JN49IK Opera-32 correlation http://df6nm.bplaced.net/opera/opds.zip

date time call distance frequency bandwidth snr correlation
2014-06-15 20:59:13 G3XDV 682km 137510.048Hz 2mHz -38.2dBOp 35% 18.4dB
2014-06-15 19:33:51 G3XDV 682km 137510.047Hz 4mHz -31.8dBOp 100% 22.0dB
2014-06-15 18:01:46 G3XDV 682km 137510.050Hz 2mHz -30.5dBOp 95% 21.5dB
2014-06-15 16:50:08 G3XDV 682km 137510.048Hz 3mHz -31.6dBOp 93% 21.7dB
2014-06-15 15:42:25 G3XDV 682km 137509.801Hz 4mHz -33.3dBOp 97% 21.9dB

WSPR-15 would give better SNR data though.
Anyway, good luck!

73, Stefan

Am 15.06.2014 18:11, schrieb Mike Dennison:

I will be running a series of tests on the 136kHz band over the next
week to coinicide with the Summer Solstice (and arguably the least
likely time of year to work LF DX).

For the next few days I will be transmitting Opera32 on 137.510kHz,
both during the day and the evening. Power is around 0.3W ERP
(absorption by the tree supporting the antenna is high at present).

More tests will follow later in the week. Reports are very welcome.

de Mike, G3XDV