RT info:eu-repo/semantics/article
T1 Analysis of spatial and temporal variability in Libya-4 with Landsat 8 and Sentinel-2 data for optimized ground target location
A1 Rodrigo, Juan Fernando
A1 Gil, Jorge
A1 Salvador González, Pablo
A1 Gómez, Diego
A1 Sanz Justo, María Julia
A1 Casanova Roque, José Luis
AB Pseudo-Invariant Calibration Sites (PICS) have been widely used by the remote sensing community in recent decades for post-launch absolute calibration, cross-calibration, and the monitoring of radiometric stability. The Committee on Earth Observation Satellites (CEOS) has established several official PICS for these purposes. Of these, Libya-4 is the most commonly used, due to its high uniformity and stability. The site was chosen as a large-area site for medium resolution sensors, and with high-resolution sensors now common, smaller sites are being identified. This work has identified an improved area of interest (AOI) within Libya-4 by using combined Landsat 8 and Sentinel 2 data. The Optimized Ground Target (OGT) was determined by calculating the coefficient of variation along with the use of a quasi-Newton optimization algorithm combined with the Basin–Hopping global optimization technique to constrain a search area small enough to perform a final brute-force refinement. The Coefficient of Variation CV of the proposed OGT is significantly lower than that in the original CEOS area, with differences between the CV of both zones in the order of 1% in the visible near-infrared (VNIR) bands. This new AOI has the potential to improve the cross-calibration between high-resolution sensors using the PICS methodology through an OGT with more homogeneous and stable characteristics.
PB MDPI
SN 2072-4292
YR 2019
FD 2019
LK https://uvadoc.uva.es/handle/10324/53069
UL https://uvadoc.uva.es/handle/10324/53069
LA eng
NO Remote Sensing, 2019, vol. 11, n. 24, 2909
NO Producción Científica
DS UVaDOC
RD 11-jul-2024