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Remote Sens. 2016, 8(7), 612; doi:10.3390/rs8070612

Radiometric Cross-Calibration of the Chilean Satellite FASat-C Using RapidEye and EO-1 Hyperion Data and a Simultaneous Nadir Overpass Approach

1
Aerial Photogrammetric Service (SAF), Chile Air Force (FACH), Santiago, Chile. Av. Diego Barros Ortiz 2300, AMB, Pudahuel, Santiago 9020000, Chile
2
School of Forestry Engineering, Faculty of Sciences, Mayor University, Camino La Pirámide 5750, Huechuraba, Santiago 8580745, Chile
3
Laboratory for Analysis of the Biosphere (LAB), University of Chile, Avenida Santa Rosa 11315, La Pintana, Santiago 8820808, Chile
4
Crux Technologies, Ricardo Lyon 1317, of. 92, Providencia, Santiago 7510575, Chile
*
Author to whom correspondence should be addressed.
Academic Editors: Richard Müller and Prasad S. Thenkabail
Received: 11 March 2016 / Revised: 18 June 2016 / Accepted: 11 July 2016 / Published: 21 July 2016
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Abstract

The absolute radiometric calibration of a satellite sensor is the critical factor that ensures the usefulness of the acquired data for quantitative applications on remote sensing. This work presents the results of the first cross-calibration of the sensor on board the Sistema Satelital de Observación de la Tierra (SSOT) Chilean satellite or Air Force Satellite FASat-C. RapidEye-MSI was chosen as the reference sensor, and a simultaneous Nadir Overpass Approach (SNO) was applied. The biases caused by differences in the spectral responses of both instruments were compensated through an adjustment factor derived from EO-1 Hyperion data. Through this method, the variations affecting the radiometric response of New AstroSat Optical Modular Instrument (NAOMI-1), have been corrected based on collections over the Frenchman Flat calibration site. The results of a preliminary evaluation of the pre-flight and updated coefficients have shown a significant improvement in the accuracy of at-sensor radiances and TOA reflectances: an average agreement of 2.63% (RMSE) was achieved for the multispectral bands of both instruments. This research will provide a basis for the continuity of calibration and validation tasks of future Chilean space missions. View Full-Text
Keywords: FASat-C; Chilean satellite; RapidEye; cross-calibration; Frenchman Flat; Spectral Band Adjustment Factor (SBAF); Hyperion FASat-C; Chilean satellite; RapidEye; cross-calibration; Frenchman Flat; Spectral Band Adjustment Factor (SBAF); Hyperion
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Barrientos, C.; Mattar, C.; Nakos, T.; Perez, W. Radiometric Cross-Calibration of the Chilean Satellite FASat-C Using RapidEye and EO-1 Hyperion Data and a Simultaneous Nadir Overpass Approach. Remote Sens. 2016, 8, 612.

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