RTO-TR-SET-098 - FTP Directory Listing - Nato

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LASER BASED STAND-OFF DETECTION OF BIOLOGICAL AGENTS Signal (counts) SAM (angle) x Fluorescence 105 8 6 4 2 0 0 200 400 600 800 1000 1200 1400 1600 1800 Time since start (s) 40 30 20 10 MS2 (0) OV (0) EH (0) BG (1) BT (0) FogOil (0) 0 0 200 400 600 800 1000 1200 1400 1600 1800 Time since start (s) Figure 26: Top: Total Measured Fluorescence 410 – 670 nm during a BG Release; Bottom: Calculated Angle between Measured Spectrum and Key Spectra. Anomaly detection was tested on datasets which were obtained in a trial with low laser pulse energy. A dataset for simultaneous release of a simulant and an interferent was created by superimposing the low signal from a BG-release on top of a strong pollen release. The pollen spectrum was in the background on which the anomaly algorithm was trained on. The weak BG release was easily detected as an anomaly although the fluorescence signal from pollen was a factor of 4 stronger that that from BG. This is shown in Figure 27 and Figure 28. 24 RTO-TR-SET-098
Wavelength [nm] -ln P(spectrum) Offset for clarity a) 400 600 b) 400 600 c) 400 600 LASER BASED STAND-OFF DETECTION OF BIOLOGICAL AGENTS Pollen release 2000 4000 6000 8000 10000 12000 14000 BG release 2000 4000 6000 8000 10000 12000 14000 BG release superimposed on pollen release 2000 4000 6000 8000 10000 12000 14000 Time sample (10 Hz) Figure 27: A BG Release was Superimposed on a Significantly Stronger Pollen Release to Test the Anomaly Detection Algorithm. Anomaly detection. BG superimposed to pollen 5 bands 10 bands 16 bands 24 bands 38 bands Pollen only 0 2000 4000 6000 8000 1 10 4 1.2 10 4 1.4 10 4 Time sample (10 Hz) Figure 28: Anomaly Detection of the BG Release Described in Figure 27. The algorithm was tested with different spectral resolutions, and the BG release was detected with high S/N for spectral resolutions above 10 bands. RTO-TR-SET-098 25
Page 1: NORTH ATLANTIC TREATY ORGANISATION
Page 4 and 5: The Research and Technology Organis
Page 6 and 7: 10.0 Spectroscopic Measurements 33
Page 8 and 9: Figure 28 Anomaly Detection of the
Page 10 and 11: CANADA Dr. Sylvie BUTEAU Space Optr
Page 12 and 13: x RTO-TR-SET-098
Page 14 and 15: Détection à distance des agents b
Page 16 and 17: LASER BASED STAND-OFF DETECTION OF
Page 54 and 55: ANNEX A - LASERS FOR BIODETECTION A
Page 56 and 57: ANNEX B - PATENT INFORMATION SEARCH
Page 66 and 67: ANNEX C - FINAL PRESENTATION FROM T
Page 80 and 81: RTO-TR-SET-098
Page 82: NORTH ATLANTIC TREATY ORGANISATION

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