FRD released the tracer sulfur hexafluoride (SF6) and collected the data during
six Intensive Observation Periods (IOPs). SF6 concentrations were sampled and
measured as the tracer dispersed in and around the Pentagon. Sampling was done using
100 programmable integrating gas samplers (PIGS). Extra samplers were also deployed at
selected stations for quality control. Quasi-instantaneous measurements were taken using
8 fast-response tracer gas analyzers (TGAs) including one van-mounted TGA that was driven
to varying locations to intercept the dispersing tracer plumes. FRD also deployed a sonic
anemometer and temperature/relative humidity probe to help measure turbulence and stability
at the release site.
Release and miscellaneous pictures
Warner, T., P. Benda, S. Swerdlin, J. Knievel, E. Argenta, B. Aronian, B. Balsley, J. Bowers,
R. Carter, P. A. Clark, K. L. Clawson, J. Copeland, A. Crook, R. Frehlich, M. L. Jensen,
Y. Liu, S. Mayor, Y. Meillier, B. Morley, R. Sharman, S. Spuler, D. Storwold, J. Sun,
J. Weil, M. Xu, A. Yates, Y. Zhang, 2006: The Pentagon Shield Field
Program: Toward critical Infrastructure Protection. Bull. Am. Met. Soc.
1750 Foote Dr.
Idaho Falls, ID 83402