Author : Omar H. Shemdin
Release : 1987
Genre :
Kind : eBook
Book Rating : /5 ( reviews)
Book Synopsis SAR (Synthetic Aperture Radar) Imaging of Ship Wakes in the Gulf of Alaska by : Omar H. Shemdin
Download or read book SAR (Synthetic Aperture Radar) Imaging of Ship Wakes in the Gulf of Alaska written by Omar H. Shemdin. This book was released on 1987. Available in PDF, EPUB and Kindle. Book excerpt: Conclusions include: 1.) The half-angles associated with narrow-V wakes are consistent with first-order Bragg surface theory. 2) The decay rate along the bright arms of the narrow-V wake is consistent with a combined viscous and radiation decay of short surface wave with first-order Bragg wave lengths. 3) Narrow-V wakes are observed in Sea States 1-3 at incidence angles less than or equal to 44 deg. The limitation is due to the noise threshold of the SAR system used. 4) The longest narrow-V wakes bright-arm observed is 12.0 km (31 deg. incidence angle) in Sea State 1, 3.9 km (44 deg incidence angle) in Sea State 2 and 4.3 km (24 deg incidence angle) in Sea State 3. In Sea State 4 no narrow-V wakes could be observed. 5) The turbulent wake (dark band between bright arms) is observed in Sea States 1-3 at incidence angles less than 53 deg. The limitations is due to the noise threshold in the SAR system used. 6) The longest turbulent wake length observed is 41 km (37 deg incidence angle) in Sea State 1, 4.5 km (35 deg incidence angle) in Sea State 2 and 5.5 km (24 deg incidence angle) in Sea State 3. No turbulent wake is observed in Sea State 4. Keywords: Synthetic aperture radar backscattering; Ocean surface waves; Deep mixed-layer marine environments; Deep water; Radar images.
