Uncertainties assessment in orbital or airborne sensors absolute calibration

Uncertainties assessment in orbital or airborne sensors absolute calibration

Cibele Teixeira Pinto1,2, Flávio Jorge Ponzoni1, Giovanni Araújo Boggione1, Leila Maria Garcia Fonseca1,
Ruy Morgado de Castro
2,3

1. Instituto Nacional de Pesquisas Espaciais – INPE, Caixa Postal 515 - 12227-010 - São José dos Campos - SP, Brasil (cibele@dsr.inpe.br, flavio@dsr.inpe.br, giovanni@dsr.inpe.br, leila@dsr.inpe.br)
2. Instituto de Estudos Avançados - IEAv/CTA, Caixa Postal 6044 - 12.231-970 - São José dos Campos - SP, Brasil (cibele@ieav.cta.br, rmcastro@ieav.cta.br)
3. Universidade de Taubaté – UNITAU, Caixa Postal 515 - 12201-970 - Taubaté - SP, Brasil (rmcastro@unitau.br)

Abstract: The electro-optical sensor absolute calibration (orbital or airborne) aims to transform the digital numbers present in the images into physical quantities. The orbital sensor calibration procedure frequently considers a reference surface on the ground. Radiometric measurements are taken from this reference surface and the results are compared to those acquired by the sensors to be calibrated. Obviously the complete calibration procedure includes uncertainties that have to be estimated in order to provide confidence to the sensor data. This work aims to evaluate the main uncertainties involved in the process of absolute calibration of eletro-optical sensors in the visible, near and middle infrared regions of the electromagnetic spectrum.

Keywords: absolute calibration, electro-optical sensor, uncertainty, Tuz Gölü

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