Cart (Loading....) | Create Account
Close category search window

Using antenna patterns to improve the quality of SeaSonde HF radar surface current maps

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Barrick, D. ; CODAR Ocean Sensors, Los Altos, CA, USA ; Lipa, B.

The SeaSonde coastal HF current mapping radar realizes its very small and convenient antenna size by employing the MUSIC direction finding (DF) algorithm, rather than beam forming to determine the bearing angle to each point on the sea plot. Beam forming requires large phased array antennas spanning up to 100 m of linear coastal extent. The SeaSonde uses two colocated crossed loops and an omnidirectional monopole as the receive antenna system. Unique features of DF polar maps can be angle sectors with sparse coverage or gaps. This occurs when the antenna patterns are distorted by nearby terrain or buildings, a frequent effect observed with all HF radars. In addition, uncorrected distortions can produce angle biases (misplacements) of the radial current vectors, sometimes as much as 10°. The actual antenna patterns (with distortions) are now measured with a small battery operated transponder, either from land in front of the antenna or from a boat. These are then inserted into the software to calibrate, i.e., correct for the distortions. A number of algorithms have been evaluated for this correction process, both using simulations (with known input) as well as actual measured sea echo. The authors present the latest findings on gap and bias mitigation, which show that nearly all of these deleterious effects can be reduced to acceptable levels

Published in:

Current Measurement, 1999. Proceedings of the IEEE Sixth Working Conference on

Date of Conference:

11-13 Mar 1999

Need Help?

IEEE Advancing Technology for Humanity About IEEE Xplore | Contact | Help | Terms of Use | Nondiscrimination Policy | Site Map | Privacy & Opting Out of Cookies

A not-for-profit organization, IEEE is the world's largest professional association for the advancement of technology.
© Copyright 2014 IEEE - All rights reserved. Use of this web site signifies your agreement to the terms and conditions.