Journal
REMOTE SENSING OF ENVIRONMENT
Volume 215, Issue -, Pages 18-32Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.rse.2018.05.033
Keywords
Landsat-8; Atmospheric correction; Remote sensing reflectance; Coral reefs; Ocean color
Funding
- USGS project
- NASA HyspIRI project [NNX15AR96G, NNX16AB05G]
- NASA CORAL project [NNX15AR96G, NNX16AB05G]
- NOAA JPSS VIIRS Ocean Color Cal/Val Project [NA11OAR4320199]
- NOAA MIT Sea Grant [2015-R/RC-140]
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The Operational Land Imager (OLI) onboard Landsat-8 satellite can provide remote sensing reflectance (R-rs) of aquatic environments with high spatial resolution (30 m), allowing for benthic habitat mapping and monitoring of bathymetry and water column optical properties. To facilitate these applications, accurate sensor-derived R-rs is required. In this study, we assess atmospheric correction schemes, including NASA's NIR-SWIR approach, Acolite's NIR and SWIR approaches and the cloud-shadow approach. We provide the first comprehensive evaluation for Landsat-8 R-rs retrievals in optically shallow coral reefs, along with an investigation of Landsat-8 R-rs products in a temperate turbid embayment. The obtained Landsat-8 R-rs data products are evaluated with concurrent in situ hyperspectral R-rs measurements. Our analyses show that the NASA and the cloud-shadow approaches generated reliable R-rs products across shallow coral reefs and optically deep waters. This evaluation suggests that high quality R-rs products are achievable from the Landsat-8 satellite in optically shallow environments, which supports further application of Landsat-8 type measurements for coral reef studies.
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