Patent ID: 11933673
Assignee: IHI CORPORATION
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A heat source detection device that detects a heat source on the earth using observation data of a radiometer provided in a geostationary satellite, the heat source detection device comprising:
a calculation unit that calculates a heat source proportion value indicating a proportion of a wavelength distribution due to the heat source included in the observation data to the observation data by curve fitting using Planck's law; and
a determination unit that determines presence or absence of the heat source according to the heat source proportion value calculated by the calculation unit,
wherein the calculation unit sets a first wavelength distribution D1, a second wavelength distribution D2 and a third wavelength distribution D3 based on predetermined temperatures determined according to a flaming state, a smoldering state and a background, respectively, calculates coefficients a, b and c satisfying a radiance G of the observation data=aD1+bD2+cD3 using a non-linear least squares method and sets the heat source proportion value to a/(a+b+c), b/(a+b+c) or c/(a+b+c).