Curve-based radiometric calibration method and system of spaceborne hyperspectral imager
US12392660B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 4, 2025 |
| Grant date | Aug 19, 2025 |
| Priority date | — |
| Expiry date | May 4, 2045 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2003/2879
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The present disclosure provides a curve-based radiometric calibration method and system of a spaceborne hyperspectral imager, which belongs to the field of remote-sensing optical technologies. A new radiometric calibration coefficient curve is introduced to describe the radiometric properties of sensor response, providing the radiometric calibration coefficients of all bands of the hyperspectral camera with linear variable filter (LVF) within an imaging spectral range to match the implementation of the programmable band selection imaging technology, and thereby efficiently and simply implementing single-band imaging, integral imaging of adjacent band, imaging of randomly-selected band combination and within-spectral-range cyclic imaging. In the present disclosure, the radiometric calibration coefficient is used to cover the entire imaging spectral range of the hyperspectral camera and match the implementation of the programmable band selection imaging technology, and realizing on-orbit absolute radiometric calibration with simple flow and strong universality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.