Eclipse WSPRing

In the run-up to the eclipse there was plenty of information concerning the eclipse and its relation to propagation. Of particular interest to me was the Eclipse Experiment proposed by HamSCI and especially their use of data from WSPRNet and PSK Reporter as well as the Reverse Beacon Network. There is an amazing amount of data collected each day by these systems that has a practical use for checking propagation conditions and a scientific use for observing the affect of events like the eclipse. WSRPNet alone averages around 1 million spots per day. Yesterday was over 1.2 million. The spots per hour broke the chart:

WSPR Spots per Hour

About 1600 UTC of the morning of the eclipse I started my WSPRLite on 20m. Band conditions were as follows:

Band conditions @ 1631 UTC

I was using my 4BTV with the WSPRlite transmitter at 200mW. I let it run for a couple of transmit rounds as a test and obtained the following results:

WSPR @ 200mW (1637 UTC)

As you can see, all the spots are in North America. I then changed to my TS-590SG and WSJT-X with the 4BTV so that I could both transmit and receive. I set the TX power to 5 W and started to WSPR on 20m.

By 1709 UTC the map looked like this:

WSPR @ 5W  (1709 UTC)

As you can see a lot more North America stations and VY0ERC on Ellesmere Island in the Arctic Ocean. VY0ERC claims to quite possibly be the most northerly Amateur Radio club in the world. At 79 degrees 59 minutes N there really isn’t all that much latitude remaining for challengers.

By 1742 UTC I received my first spots in Central and South America as well as the first spot by a station in Europe, F4GUK in France.

WSPR @ 5W (1742 UTC)

According to this NASA map, in the US, the eclipse started at 9:06 AM PDT\16:06 UTC in Madras, OR and ended in the US at 4:06 PM EDT/2006 UTC in Columbia, SC, so the US time window for the eclipse was roughly 1600 to 2000 UTC.

WSPR @ 5W (2100 UTC)

WSPR @ 5W (2100 UTC)

By 2100 I received a spot in Australia, VK2CBD and Europe as well as South America had opened up to some degree and a spot by VE8GER, northwest of Inuvik, Northwest Territories. I had two odd ones, KG9BEP that appears to be in the middle of the Sea of Okhotsk and KC6EVC which was off the top of the map. Neither were legitimate callsigns.

US WSPR detail @ 2100 UTC

I forgot to capture band conditions at 2100, but at 2153 they were as follows:

Band conditions @ 2153 UTC

The most noticeable changes were that A dropped to 11 from 22, and K from 3 to 2 over the course of roughly 5 hours. I want to say that conditions improved over the course of the day and the data supports this to large extent, though what portion of this is attributable to the eclipse or just the fluctuating conditions that we find ourselves in is hard to say.

By the time that I pulled the hook at about 2200 UTC I had received 1868 spots. I placed all of my spots in Excel and made a simple chart of the number of spots per time period. I hesitate to put this up as there are about 34.785 variables at play so don’t take this too seriously:

Spots over time

The red lines are the time boundaries of the eclipse. The time runs from 1628 UTC to 21:58 UTC. The maximum number of spots was 99. The first two points were at 200mW and the rest were at 5W. That explains the jump to the third datapoint. As I said, 34,785 variables. My station was heard by 297 unique stations and I heard 179 unique stations. There were a lot of receive only spotters.

As for what all of this means, that I’ll leave to the actual scientists, based just upon WSPRnet they certainly obtained a pile of data. My conclusions are that WSPRing continues to be intriguing and as always, Amateur Radio is an interesting hobby.



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