2-D inner-shelf current observations from a single VHF WEllen RAdar (WERA) station
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Abstract
The majority of High Frequency (HF) radars used worldwide operate at medium to high frequencies (8 to 30 MHz) providing spatial resolutions ranging from 3 to 1.5 km and ranges from 150 to 50 km. This paper presents results from the deployment of a single Very High Frequency (VHF, 48 MHz) WEllen RAdar (WERA) radar with spatial resolution of 150 m and range 10-15 km, used in the nearshore off Cape Hatteras, NC, USA. It consisted of a linear array of 12 antennas operating in beam forming mode. Radial velocities were estimated from radar backscatter for a variety of wind and nearshore wave conditions. A methodology similar to that used for converting acoustically derived beam velocities to an orthogonal system is presented for obtaining 2-D current fields from a single station. The accuracy of the VHF radar-derived radial velocities is examined using a new statistical technique that evaluates the system over the range of measured velocities. The VHF radar velocities showed a bias of 3 to 7 cm/s over the experimental period explainable by the differences in radar penetration and in-situ measurement height. The 2-D current field shows good agreement with the in-situ measurements. Deviations and inaccuracies are well explained by the geometric dilution analysis.
Study Area
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | 2-D inner-shelf current observations from a single VHF WEllen RAdar (WERA) station |
| ISBN | 9781457700224 |
| DOI | 10.1109/CWTM.2011.5759525 |
| Year Published | 2011 |
| Language | English |
| Publisher | IEEE |
| Contributing office(s) | Woods Hole Coastal and Marine Science Center |
| Description | 9 p. |
| Larger Work Type | Book |
| Larger Work Subtype | Conference publication |
| Larger Work Title | 2011 IEEE/OES/CWTM 10th working conference on current, waves and turbulence measurement, CWTM 2011 |
| First page | 57 |
| Last page | 65 |
| Conference Title | 2011 IEEE/OES/CWTM 10th Working Conference on Current, Waves and Turbulence Measurement, CWTM 2011 |
| Conference Location | Monterey, CA |
| Conference Date | March 20-23, 2011 |
| Country | United States |
| State | North Carolina |
| Other Geospatial | Cape Hattaras |
| Google Analytic Metrics | Metrics page |