Spectral and Radiometric calibration of a VNIR hyperspectral camera to acquiring spectral signatures

The use of hyperspectral cameras in remote sensing has increased over the years, mainly due to their high spectral resolution compared to multispectral instruments. On the other hand, commercial hyperspectral cameras are used for scientific purposes as a more practical alternative. The objective of this work is to describe the calibration and characterization process of a hyperspectral camera sensitive to the visible and near infrared portion of the electromagnetic spectrum, in order to use it in a laboratory environment to obtain calibrated spectral signatures. Comparison of our results with the data sheet and test results provided by the camera manufacturer shows significant discrepancies. This suggests the need to perform a new spectral characterization and calibration of the instrument when scientific applications require a deeper knowledge of the camera beyond the technical specifications provided by the manufacturer. In addition, it should be noted that the above-mentioned characterization and calibration was performed using laboratory instruments with expired certification, so a methodology combining a certified and calibrated spectroradiometer and international standards was developed.