Proceedings Article | 5 May 2010
Proc. SPIE. 7665, Chemical, Biological, Radiological, Nuclear, and Explosives (CBRNE) Sensing XI
KEYWORDS: Target detection, Long wavelength infrared, Hyperspectral imaging, Infrared imaging, Standoff detection, Sensors, Calibration, Solids, Spectral resolution, Infrared radiation
Airborne hyperspectral ground mapping is being used in an ever-increasing extent for numerous
applications in the military, geology and environmental fields. The different regions of the
electromagnetic spectrum help produce information of differing nature. The visible, near-infrared and
short-wave infrared radiation (400 nm to 2.5 μm) has been mostly used to analyze reflected solar light,
while the mid-wave (3 to 5 μm) and long-wave (8 to 12 μm or thermal) infrared senses the self-emission
of molecules directly, enabling the acquisition of data during night time.
The Telops Hyper-Cam is a rugged and compact infrared hyperspectral imager based on the Fourier-transform
technology. It has been used on the ground in several field campaigns, including the
demonstration of standoff chemical agent detection. More recently, the Hyper-Cam has been integrated
into an airplane to provide airborne measurement capabilities. The technology offers fine spectral
resolution (up to 0.25 cm-1) and high accuracy radiometric calibration (better than 1 degree Celsius).
Furthermore, the spectral resolution, spatial resolution, swath width, integration time and sensitivity are
all flexible parameters that can be selected and optimized to best address the specific objectives of each
mission.
The system performance and a few measurements have been presented in previous publications. This
paper focuses on analyzing additional measurements in which detection of fertilizer and Freon gas has
been demonstrated.
