I had some time today to experiment with my SparkFun RTK Torch and new Android TCL tablet. On my 155ft test length I could not get RTK Fix for the entire 2 hours I was testing
DGPS a lot, confirmed my license loaded for Point Perfect. Only got RTK Float once for about a minute
Experimentation with signal to noise and satellite elevation did not seem to make a difference
The solar weather fansite solarham.com is provided by an amateur radio operator but is a great general interest (and a lot of more obscure measurements, too) resource for current conditions as well as looking back a day or two. The paragraphs near the bottom are good summaries for what’s going on up there.