The chart above shows the number of individual WSPR stations that I heard on the 28 MHz band from the 1st of July to the 30th of July 2021.
If you examine it carefully, there are subtle differences between the first half and the second half of the month as the Sporadic-E season begins to splutter and the intensity decreases.
2021 Vs 2020: My own feeling is that there were more WSPR stations active on the 28 MHz band in the Summer of 2021 as compared to the Summer of 2020.
I did a comparison between the number of stations I heard during the first 30 days of July 2021 and compared them to the same period of 2020.
Now, there is a caveat with this data as I can't be 100% certain if I was listening all of the time in July 2020 but it's very likely I was.
Looking at the data, I heard an average of 55 stations per day in this time period in 2020 as compared to an average of 71 stations per day in 2021, an increase of just over 28%.
As the chart shows, there are a lot more higher Blue days than Red. For example, there are six days in July 2021 where I heard more than 90 stations in one day as compared to none over 90 in 2020.
This isn't just down to conditions, it's due to there being more WSPR activity on the 28 MHz band this year which is a welcome development.
I'm sure as the Sporadic-E season winds down at the end of August, a lot of stations will probably migrate to the lower HF bands. I'm not sure what I will do myself as once the activity level drops below a certain level, it kind of gets a bit pointless monitoring a quiet frequency with no activity.
It's likely I'll switch back to monitoring the FT8 frequency on 28 MHz over the Winter as this will show if anything unusual is happening on the band.
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