Using SeaWiFS measurements to evaluate radiometric stability of pseudo-invariant calibration sites at top of atmosphere
Affiliation
Institute of Remote Sciences and Digital EarthUniversity of Maryland
London Metropolitan University
Issue Date
2014-06-30
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The Sea-Viewing Wide Field-of-View Sensor (SeaWiFS) data from 1997 to 2001 are adopted to monitor the radiometric stability of six pseudo-invariant calibration sites (PICSs) at the top of atmosphere (TOA). Cloud-free and homogeneous observations of the spectral TOA reflectance ρTOA at eight SeaWiFS channels over these sites are fitted to the Ross-Li bidirectional reflectance distribution function (BRDF) model, and the time series of BRDF-normalized spectral TOA reflectance RTOA is presented and analyzed afterward. Overall, good stability during the evaluated period is exhibited as more than half of the derived trends are statistically insignificant, whereas root mean square (RMS) of the BRDF modeling residuals reveal spectral dependence of the PICSs' stability at TOA, i.e., the uncertainty of RTOA appears to be larger at shortwave visible (SV) channels (~2.5%) compared with that of red/NIR bands (~1%). In addition, the early mission data adopted in our study shows favorable reliability thus is recommended to be applied for similar purposes.Citation
Li, C. et al (2015) 'Using SeaWiFS Measurements to Evaluate Radiometric Stability of Pseudo-Invariant Calibration Sites at Top of Atmosphere', IEEE Geoscience and Remote Sensing Letters, 12 (1):125Publisher
IEEEJournal
IEEE Geoscience and Remote Sensing LettersDOI
10.1109/LGRS.2014.2329138Additional Links
http://ieeexplore.ieee.org/document/6846342/Type
ArticleLanguage
enISSN
1545598XEISSN
15580571ae974a485f413a2113503eed53cd6c53
10.1109/LGRS.2014.2329138
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