Solarcast fixed sensor. Sometimes moving by car. So location may vary. Graphs should be inspected with reference to the location and date. Please consult the data on https://api.safecast.org/en-US/devices/300071/measurements?order=captured_at+desc
The sensor reporting level is often a bit higher as http://realtime.safecast.org/sensors/300071/ this is a design feature to get alpha, beta and gamma data from a LND7318 tube.
After some weeks in very humid weather some condensation inside.