Publications

Klein, D; Richter, R; Strobl, C; Schlapfer, D (2019). Solar Influence on Fire Radiative Power Retrieved With the Bispectral Method. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING, 57(7), 4521-4528.

Abstract
Fire radiative power (FRP) is a key product to quantify active fires, which indicates fuel consumption and fire emissions. In the case of the bispectral method, it can be calculated from remote sensing data if a midinfrared (3.8 mu m) and thermal infrared channel (similar to 10 mu m) are available. While different uncertainty sources have been investigated, the quantitative evaluation of the FRP error as a function of reflected solar radiation is still missing. The ground-reflected solar radiance adds an unknown signal component to the at-sensor radiance during the daytime, which influences the fire detection algorithm as well as the FRP product. FRP errors can reach up to 5%-15% for smoldering fire temperatures of 400-500 K, which is a systematic bias. Errors decrease with increasing temperature and for temperatures higher than 700 K, i.e., flaming fires, the FRP bias is less than 2%. The evaluation is performed for the TET-1 instrument of DLR's FireBIRD mission using the bispectral method.

DOI:
10.1109/TGRS.2019.2891394

ISSN:
0196-2892