Wednesday 4 July 2018

Chinese WSPRs

Last night, I obtained a special event callsign from the regulator, so that I can tell the world about noctilucent clouds through the medium of radio.

The new call is GB0NLC. 

Yet again, I had to contact QRZ.com to tell them to change the country flag from England to Wales, as entering Wales into the DXCC entity box doesn't have any effect on the flag displayed (it's based on the prefix instead, hence the confusion).  Strictly speaking, GB stations should be 'United Kingdom', not England, and everyone except the more extreme nationalists would be happy with that.  Still, it's better than being in Northern Ireland, a constituent of the UK, which typically, and rather sadly, has no flag displayed at all due to the intractable, centuries-long political sensitivities and conflicts there.

It's rather busy in the house these days, so this morning, I deployed the SES on 20m WSPR.  To my surprise, and for the first time in a very long while, I heard a station in China - BH3NVN, albeit at a weak -27dB S/N.

In the morning (04/04/18), only I and an OZ station heard the BH3 signal.  Two other stations heard it at 22:20UT the previous evening.  In the preceding 24 hours, about a dozen stations heard China, all but one in Europe.

Spots of BH3NVN in 24 hours prior to 09:10 04/07/2018.
 
The timing of reception of the BH3 signal doesn't show a very obvious pattern, other than being a daylight shortpath to Europe, with the signal disappearing in Europe between 18:00 and 22:20UT.  One Russian station heard the signal, as did one Chinese and one Japanese station.  There were no spots from anywhere else at all.

The return of the signal between 22:20 and about 01:00UT reveals propagation eastward to Europe along the 'greyline'.  The signal vanishes again until OZ picks it up an hour or so after local sunrise.

The BH3 station appears to have become active at around 11:40UT on 03/07/2018, when the first spot was returned from a nearby Chinese SWL.  Even though there has been plenty of common daylight between them since then, nobody at all has yet heard the BH3 signal in the USA.






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