Modification of 6SV to remove skylight reflected at the air-water interface: Application to atmospheric correction of Landsat 8 OLI imagery in inland waters

Zhaoyi Lu; Junsheng Li; Qian Shen; Bing Zhang; Hao Zhang; Fangfang Zhang; Shenglei Wang

doi:10.1371/journal.pone.0202883

Modification of 6SV to remove skylight reflected at the air-water interface: Application to atmospheric correction of Landsat 8 OLI imagery in inland waters

PLoS One. 2018 Aug 24;13(8):e0202883. doi: 10.1371/journal.pone.0202883. eCollection 2018.

Authors

Zhaoyi Lu^{1

2}, Junsheng Li¹, Qian Shen¹, Bing Zhang¹, Hao Zhang¹, Fangfang Zhang¹, Shenglei Wang¹

Affiliations

¹ Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China.
² University of Chinese Academy of Sciences, Beijing, China.

Abstract

During the atmospheric correction of remote sensing data in inland waters, the original Second Simulation of the Satellite Signal in the Solar Spectrum-Vector version (6SV) model does not eliminate the specular reflection of downward skylight radiance at the air-water interface. Thus, we propose a modified version of the 6SV model (M6SV) that does remove reflected skylight at the air-water interface. We apply the new model to the atmospheric correction of a Landsat 8 Operational Land Imager (OLI) image over Taihu Lake, China, where the aerosol optical depth is known. In situ reflectance measurements acquired concurrently with the L8/OLI image are used to validate the performance of the new M6SV algorithm. To further analyze the merits and demerits of M6SV, the model is compared with two short-wave infrared (SWIR)-based atmospheric correction models: the Sea-Viewing Wide Field-of-View Sensor Data Analysis System short-wave infrared (SD-SWIR) model and the Vanhellemont & Ruddick short-wave infrared with a per scene fixed aerosol type (VR-SWIR-F) model. Comparisons of results from all three L8/OLI image atmospheric corrections with the in situ remote sensing reflectance data show that M6SV produces reliable atmospheric corrections in the green and red spectral bands and is an effective alternative for Landsat 8 OLI atmospheric correction in inland waters.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Air*
Algorithms
Image Processing, Computer-Assisted*
Models, Theoretical*
Satellite Imagery*
Water*

Substances

Water

Grants and funding

The work was jointly supported by the National Key Research and Development Program of China (2016YFB0501502), the High Resolution Earth Observation Systems of the National Science and Technology Major Projects (41-Y20A31-9003-15/17 to J.L.), the National Natural Science Foundation of China (No. 91638201 to B.Z., 41571361 to Q.S., 41471308 to J.L.).The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.