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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
Solicitation Topic Code: 8.2.4
Solicitation Number: NOAA-2017-1
Timeline
Solicitation Year: 2017
Award Year: 2017
Award Start Date (Proposal Award Date): 2017-06-14
Award End Date (Contract End Date): 2017-12-14
Small Business Information
1914 Plymouth Street
Mountain View, CA 94043
United States
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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