Improved Detection of the First-Order Region for Direction-Finding HF Radars Using Image Processing Techniques

Content Provider	Semantic Scholar
Author	Kirincich, Anthony R.
Copyright Year	2017
Abstract	AbstractFor direction-finding high-frequency (HF) radar systems, the correct separation of backscattered spectral energy due to Bragg resonant waves from that due to more complex double-scattering represents a critical first step toward attaining accurate estimates of surface currents from the range-dependent radar backscatter. Existing methods to identify this “first order” region of the spectra, generally sufficient for lower-frequency radars and low-velocity or low-surface gravity wave conditions, are more likely to fail in higher-frequency systems or locations with more variable current, wave, or noise regimes, leading to elevated velocity errors. An alternative methodology is presented that uses a single and globally relevant smoothing length scale, careful pretreatment of the spectra, and marker-controlled watershed segmentation, an image processing technique, to separate areas of spectral energy due to surface currents from areas of spectral energy due to more complex scattering by the wave field o.
Starting Page	1679
Ending Page	1691
Page Count	13
File Format	PDF HTM / HTML
DOI	10.1175/JTECH-D-16-0162.1
Volume Number	34
Alternate Webpage(s)	https://darchive.mblwhoilibrary.org/bitstream/handle/1912/9227/jtech-d-16-0162.1.pdf?isAllowed=y&sequence=1
Alternate Webpage(s)	https://www2.whoi.edu/staff/akirincich/wp-content/uploads/sites/150/2017/11/2017_Kirinich_IMprovedDetection.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article