Augmented D3S SIGMA Dataset - Analysis of Handheld Gamma-Ray Spectrometers for Urban Threat Detection

Augmented data from Project SIGMA Pilot 3 test in London as detailed in "Analysis of Handheld Gamma-Ray Spectrometers for Urban Threat Detection", S. Fearn et.al. (2025), In prep.Background data is taken for 1 week 24th-30th September 2018 (for the training set) and 1st-7th October (for the test set), for approximately 12 hours each day from 8am-8pm, for D3S with serial number "D3 SGM109457".Extra information about the data and usage are available in "info.txt" and in the paper mentioned above.