US 2026/0092816 A1Published application

Method and an Apparatus of Calibrating a Thermal Satellite for Measuring Land Surface Temperature

AssigneeOroraTech GmbH

InventorsChristian MOLLIÈRE, Lukas LIESENHOFF

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Abstract

The invention concerns a method for calibrating a thermal satellite used to measure land surface temperature (LST). Based on real-time infrared image data, a preliminary LST product is calculated. For each location point, a reference surface temperature from a weather model is retrieved. A radiance measurement offset is then determined based on the reference temperature. Using this offset, the satellite's radiance measurements are corrected, and a calibrated LST product is generated. The method allows calibration to begin as soon as infrared data is sensed, enabling real-time LST measurement with real-time calibration. This supports dynamic in-orbit calibration throughout the satellite's orbit and improves the reliability and accuracy of LST measurements.

Claims14

Dependent claims

Method of calibrating a thermal satellite for measuring land surface temperature, LST, the method comprising the following method steps for calibration:

calculating (S101) a preliminary LST product (T) based on infrared image data of the earth's surface acquired by the thermal satellite,
for a location point included in the preliminary LST product (T), obtaining (S102) a reference surface temperature (Ri) of a same time from a weather model, calculating (S103) a radiance measurement offset (d) based on the reference surface temperature (Ri),
determining (S104) a calibrated radiance measurements (Lcorr) of the thermal satellite based on the radiance measurement offset d, and
calculating (S105) a calibrated LST product (Tcorr) based on the calibrated radiance measurements (Lcorr),
wherein calibration starts directly when real-time infrared image data of the earth's surface has been sensed to enable real-time LST measurements with real-time calibration.

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Dependencies are inferred from the claim text.