Photometer data was collected starting at 6:00 AM MDT. The sky was clear, but it was also a frosty morning. The photometer has been left out all night.
The blue spike is unique, it has never been observed before. It was also determined the photometer battery has a low voltage. Either frost or low voltage may have contributed to the blue spike. Another test will be necessary to investigate this matter.
The photometer was oriented with its DB9 connector facing North.