Development and testing of a hyperspectral imaging instrument for field spectroscopy

Infrared Imaging Fourier Transform Spectrometer as the Stand-Off Gas Detection System

“…Finally, results are presented to demonstrate the capabilities and the performances of the remote gas quantification by using hyperspectral data obtained from the Telops HyperCam spectrometer. The latter is described in much detail in the references [9][10][11][12].…”

“…It is this equation can be used at the detection algorithm of gases. The algorithms of automation gases detection were under development and tests [10,12]. The influence of emissivity coefficient on measurement results can also be compensated by adopting several methods from pyrometer non-contact temperature measurements.…”

“…This atsensor radiance, L(λ) is a summation of the contributions of numerous terms including both reflected solar and emitted thermal effects. In the LWIR band, emissive terms dominate and reflective effects are generally considered negligible [12]. For ground-based observation of a gaseous plume, the at-sensor radiance can be described as:…”

“…1 shows a picture of the HyperCam device during the measurement session. The sensor is controlled by a field computer and the recorded data is stored on a RAID drive to guarantee data integrity [12]. The Reveal software package is provided for the HyperCam control, registration and calibration of raw data, and for the data analysis as well.…”

“…The first deals with the whole contribution of the released gases through the atmosphere. And the second is devoted to understanding how the instrument itself does add its own signature into the measurement [11,12].…”