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Remote Sensing
Volume 12
Issue 17
10.3390/rs12172736
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Article

An Empirical Radiometric Intercomparison Methodology Based on Global Simultaneous Nadir Overpasses Applied to Landsat 8 and Sentinel-2

by
Jorge Gil
1,*,
Juan Fernando Rodrigo
2,
Pablo Salvador
2,
Diego Gómez
2,
Julia Sanz
2 and
Jose Luis Casanova
2
1
Independent Researcher, 47011 Valladolid, Spain
2
Remote Sensing Laboratory (LATUV), University of Valladolid, Paseo de Belen 11, 47011 Valladolid, Spain
*
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(17), 2736; https://doi.org/10.3390/rs12172736
Submission received: 11 June 2020 / Revised: 17 August 2020 / Accepted: 21 August 2020 / Published: 24 August 2020
(This article belongs to the Special Issue Cross-Calibration and Interoperability of Remote Sensing Instruments)
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Abstract

The Simultaneous Nadir Overpass (SNO) method was developed by the NOAA/NESDIS to improve the consistency and quality of climate data acquired by different meteorological satellites. Taking advantage of the reduced impact induced by the Bidirectional Reflectance Distribution Function (BRDF), atmospheric effects, illumination and viewing geometries during an SNO, we created a sensor comparison methodology for all spectral targets. The method is illustrated by applying it to the assessment of data acquired by the Landsat 8 (L8), Sentinel-2A (S2A), and Sentinel-2B (S2B) optical sensors. Multiple SNOs were identified and selected without the need for orbit propagators. Then, by locating spatially homogeneous areas, it was possible to assess, for a wide range of Top-of-Atmosphere reflectance values, the relationship between the L8 bands and the corresponding ones of S2A and S2B. The results yield high coefficients of determination for S2 A/B with respect to L8. All are higher than 0.980 for S2A and 0.984 for S2B. If the S2 band 8 (wide near-infrared, NIR) is excluded then the lowest coefficients of determination become 0.997 and 0.999 from S2A and S2B, respectively. This methodology can be complementary to those based on Pseudo-Invariant Calibration Sites (PICS) due to its simplicity, highly correlated results and the wide range of compared reflectances and spectral targets.
Keywords: cross-calibration; interoperability; Landsat-8 OLI; radiometric calibration; Sentinel-2 MSI; Simultaneous Nadir Overpasses cross-calibration; interoperability; Landsat-8 OLI; radiometric calibration; Sentinel-2 MSI; Simultaneous Nadir Overpasses
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MDPI and ACS Style

Gil, J.; Rodrigo, J.F.; Salvador, P.; Gómez, D.; Sanz, J.; Casanova, J.L. An Empirical Radiometric Intercomparison Methodology Based on Global Simultaneous Nadir Overpasses Applied to Landsat 8 and Sentinel-2. Remote Sens. 2020, 12, 2736. https://doi.org/10.3390/rs12172736

AMA Style

Gil J, Rodrigo JF, Salvador P, Gómez D, Sanz J, Casanova JL. An Empirical Radiometric Intercomparison Methodology Based on Global Simultaneous Nadir Overpasses Applied to Landsat 8 and Sentinel-2. Remote Sensing. 2020; 12(17):2736. https://doi.org/10.3390/rs12172736

Chicago/Turabian Style

Gil, Jorge, Juan Fernando Rodrigo, Pablo Salvador, Diego Gómez, Julia Sanz, and Jose Luis Casanova. 2020. "An Empirical Radiometric Intercomparison Methodology Based on Global Simultaneous Nadir Overpasses Applied to Landsat 8 and Sentinel-2" Remote Sensing 12, no. 17: 2736. https://doi.org/10.3390/rs12172736

APA Style

Gil, J., Rodrigo, J. F., Salvador, P., Gómez, D., Sanz, J., & Casanova, J. L. (2020). An Empirical Radiometric Intercomparison Methodology Based on Global Simultaneous Nadir Overpasses Applied to Landsat 8 and Sentinel-2. Remote Sensing, 12(17), 2736. https://doi.org/10.3390/rs12172736

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