Single-Mast Transmit-Receive Antenna for Long-Range Coastal HF Radars Below 11 MHz

Award Information
Agency: Department of Commerce
Branch: National Oceanic and Atmospheric Administration
Contract: WC-133R-17-CN-0080
Agency Tracking Number: 17-1-049
Amount: $119,283.11
Phase: Phase I
Program: SBIR
Awards Year: 2017
Solicitation Year: 2017
Solicitation Topic Code: 8.2.4
Solicitation Number: NOAA-2017-1
Small Business Information
1914 Plymouth Street, Mountain View, CA, 94043
DUNS: 161169099
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Chad Whelan
 (408) 773-8240
 chad@codar.com
Business Contact
 Chad Whelan
Phone: (408) 773-8240
Email: chad@codar.com
Research Institution
N/A
Abstract
The U.S. High Frequency Radar (HFR) network contains more than 140 coastal stations that provide hourly two-dimensional coastal surface currents. Approximately one-third of these are Long Range (LR) systems that transmit in the 4 – 5.5 MHz frequency band and have nominal offshore ranges and resolutions of 160-220 km and 3 – 6 km, respectively. The data provided by the network has numerous applications but is most critical to Coast Guard search & rescue and oil spill response [Harlan, et al, 2010]. HFR stations operating below 11 MHz, presently require separate transmit and receive antennas spaced approximately 60 m, which precludes mounting on structures such as buildings or platforms and limits most to ground mounts close to the water. During Hurricanes Irene (2011) and Sandy (2012), HFR was shown to be a key observation tool, along with others, to better predict intensity of approaching hurricanes before they make landfall [Glenn, et al, 2016]. Sandy’s storm surge destroyed the stations that were installed in the most vulnerable low-lying coastlines. CODAR proposes to redesign LR HFR antenna(s) to fit on a single mast so that these systems can be installed on platforms such as weather-hardened Sentinel water level monitoring stations, reducing risk of loss.

* Information listed above is at the time of submission. *

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