Biological aerosol field trial: Exploring a UAS biological collection point sensor and its interoperability with standoff technology
Bibliographic record
Abstract
Defence Research and Development Canada (DRDC) is actively pursuing solutions in detection and identification of Chemical, Biological, and Radiological (CBR) agents utilizing a variety of techniques. The techniques used to provide advanced warning of a biological threat can range from fixed point sensor arrays, fixed stand-off technologies, and point sensors that have been integrated into Uncrewed Ground and Aerial Vehicles (UGV/UAV). Military personnel desire a rapid and concise understanding of the threat environment with field forward technologies in order to pursue the most appropriate path to mission success. The Suffield Research Center (SRC) held a biological aerosol field trial to explore the performance of a custom biological sampling point sensor designed for Uncrewed Aircraft System (UAS) operations and its interoperability with LIDAR-based standoff technology against biological threat simulants Bacillus atrophaeus (BG) and Ovalbumin (OV). In total, 25 releases of BG and OV in varying concentrations were performed over the four-day field trial to understand the interplay of tasking mobile point sensors from the standoff technology. Each specific trial also tried to determine the optimal placement of the UAV in the dispersal cloud, its duration in the cloud, and the relationship between the real-time information from the sensor on the UAV and the collection filter. The standoff capability detected and tracked each of the generated clouds, and relayed multiple waypoints corresponding to the clouds’ highest concentration to the UAS operator. The UAV payload collected BG on the filters in each release in varying concentrations, however, the identification success rate using field-forward technologies varied between 50% and 100%. The approach to use total particle count rate as a method to infer total biological material collected without monitoring background levels was insufficient; further trials will determine the best method using particle size distribution and UltraViolet Laser-Induced Fluorescence (UV-LIF) data to optimize collection.Copyright © 2025 American Association for Aerosol Research
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".