HyTIR – an airborne hyperspectral imaging research platform in the LWIR wavelength range

Abstract. Hyperspectral cameras play a crucial role in remote sensing across various applications. The sensors designed for the visible to near-infrared (VNIR) and short-wave infrared (SWIR) ranges are particularly valuable due to their ability to detect reflected light from measured objects and absorption characteristics of atmospheric radiation. These capabilities are essential for numerous environmental and agricultural monitoring applications. In addition to VNIR and SWIR sensors, imaging sensors that operate within the mid-wave and long-wave infrared ranges have been developed. These sensors focus on capturing radiation emitted by objects due to their inherent temperatures. Despite their potential, these infrared sensors have seen limited use primarily because of the higher costs associated with their deployment. Anhalt University of Applied Sciences is overcoming some of these limitations by incorporating an FTIR hyperspectral camera, specifically for the long-wave infrared (LWIR) range, into its repertoire of imaging sensors. This expansion is part of a project funded by the GRC to establish the HyTIR platform. The primary aim of this platform is to support Earth observation missions and to enhance measurement campaigns in agricultural and environmental science fields. The article outlines the distinctive features of the measurement system provided by the FTIR hyperspectral camera. It details how this system is flexibly combined with complementary sensors depending on the requirements of each campaign. The article also presents initial findings from test flights conducted using the system. The overarching goal of the HyTIR platform is to make its advanced capabilities available to the international scientific community. By doing so, it aims to contribute significantly to the fields of remote sensing as well as agricultural and environmental sciences, by enabling advanced Earth observation and data collection methodologies.