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Specim AisaOWL

Specim AisaOWL

The AisaOWL thermal imaging system due to be delivered in Q1 2014.

The AisaOWL is a small pushbroom hyperspectral imaging system designed to provide the remote sensing community with high quality data in the LWIR region of the electromagnetic spectrum. The AisaOWL cooling, essential to the operation of the LWIR sensor, is achieved through a stirling cycle cooler, this greatly reduces the complexity compared with LN2 (liquid nitrogen) and helps to maintain a sensor weight of only 13·1 kg.

Due to the sensor design and sensitivity, AisaOWL simultaneously captures spectral bands for the whole 384 swath-width of pixels, and sustains the 100 frames per second storage speed of the whole datacube. As a result, high sensor or target dynamics are possible without degradation of image quality.

Specim's thermal airborne hyperspectral sensor AisaOWL, covers the contiguous spectral range from 7·6 to 12·5 µm in 100 channels and has the sensitivity to detect some gases. It is capable of recognising the chemical composition of even freezing cold materials in pitch darkness.

Line of sight jitter, sampling jitter, spatial pixel mixing, spectral shift and clipping effects are all major airborne hyperspectral imaging problems in Fourier Transform and whisk-broom type instruments; these have been specifically addressed or removed by the design architecture of AisaOWL, while maintaining unparalleled sensitivity and lack of complexity.

The only moving part of the AisaOWL sensor is the shutter, used for dark image calibration between data collection sessions. Since the airborne image data is captured without any moving parts or requiring complex mounting systems, there are no distortions caused by any mechanical inaccuracies.

Full details of the system can be downloaded from Specim's websiteexternal link.