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There are a few oddities with the data here. You will notice a spike at the highest energy channel. This captures all energies at 2822 KeV and above, making it the widest channel.
During rain, you will see a gradual increase in radiation.
The gamma spectrometer is down the street from a location that performs RT (Radiographic Testing) on their oil/gas equipment, so on many weeknights, you will see spikes in the real time radiation levels.
The radiation units appear to be uRem, even though I have the Radiacode set to uSv.