Presentation
Techniques for Detection of Relative Oil Thickness using Spaceborne SAR
SessionMeet the Poster Authors
DescriptionThree techniques for the estimation of relative oil thickness were compared. The first technique used the Damping Ratio (DR). The second technique used RADARSAT-2 quad polarized data, and third technique entailed the use of Compact Polarimetry (CP) data which is available from the RADARSAT Constellation Mission (RCM).
The DR was given by (σwater / σoil), where σ is the radar backscatter. The Cloude-Pottier entropy was extracted from a RADARSAT-2 QP image acquired off the coast of Louisiana. There was good agreement with the expected response of the polarimetric parameters for ocean-slick discrimination. Further, the response and spatial variability of the parameters agreed favorable with an oil thickness estimates derived from application of a Maximum Likelihood Classifier using ASTER and WorldView images.
A RCM 5M CP image (5 m resolution, 30 km x 30 km scene size) was acquired June 26, 2022. Three CP parameters were selected for slick discrimination analysis: Degree of Circular Polarization, Degree of Polarization, and Entropy. Although there was variable performance for the discriminators, in general the measured values agreed with the expected values.
Future work will focus on the acquisition of the RCM 30 m and 50 m resolution CP data over the Santa Barbara study site. A key advantage of the 30 m and 50 m resolution modes is the lower noise floor, ~ -34 dB, relative to the 5 m resolution RCM mode.
The DR was given by (σwater / σoil), where σ is the radar backscatter. The Cloude-Pottier entropy was extracted from a RADARSAT-2 QP image acquired off the coast of Louisiana. There was good agreement with the expected response of the polarimetric parameters for ocean-slick discrimination. Further, the response and spatial variability of the parameters agreed favorable with an oil thickness estimates derived from application of a Maximum Likelihood Classifier using ASTER and WorldView images.
A RCM 5M CP image (5 m resolution, 30 km x 30 km scene size) was acquired June 26, 2022. Three CP parameters were selected for slick discrimination analysis: Degree of Circular Polarization, Degree of Polarization, and Entropy. Although there was variable performance for the discriminators, in general the measured values agreed with the expected values.
Future work will focus on the acquisition of the RCM 30 m and 50 m resolution CP data over the Santa Barbara study site. A key advantage of the 30 m and 50 m resolution modes is the lower noise floor, ~ -34 dB, relative to the 5 m resolution RCM mode.
Event Type
Poster
TimeMonday, May 13th5:00pm - 6:00pm CDT
LocationExhibit Hall G
Preparedness
Prevention
Remediation
Response
Restoration