A few months ago, I wrote a blog post asking the question "Where are all the hams?". For that blog post, I generated heat maps of regions of the world showing WSPR1 activity. A few days ago, I sent an email to Philip Gladstone, from the PSK Reporter's website, to ask him if the archive of all the spotting was accessible online. The short answer was no, but he was nice enough to send me a file with all the maidenhead2 grid squares with the number of active hams in each square.
In my previous blog post maps, I showed the WSPR activity over a month. The following graphs display the regions where they has been at least one active ham over the past year. I have also changed the colormaps to show more contrast in areas with low activity.
There are no surprises in the charts using this new dataset. The regions with the bulk of the activity are the same. However, with the growing popularity of FT8, it is possible to see ham activity in some of the less populated areas.
You can refer to the previous post to see the differences.
Thank Philip Gladstone, for all his work on the pskreporter.info service and for sending me this dataset.