Michael G. Cotton , , , , Linh P. Vu , , Bradley Eales , and Adam C. Hicks

Abstract: This report presents spectrum occupancy results for 3.45–3.55 GHz and for 3.55−3.65 GHz at sensor sites near San Diego CA (SD), Norfolk VA (NF), San Francisco CA (SF), and Astoria OR (AS). Sensors operated at the following {start date, end date, 2018 reliability, 2019 reliability}: SD {05/17, 09/19, 53.2%, 35.4%}, NF {05/17, 12/19, 61.7%, 74.2%}, SF {11/17, 12/19, 86.4%, 28.7%}, AS {05/18, 09/19, 46.7%, 100.0%}. The acquired data was processed to monthly and yearly mean band occupancy estimates. At ports with high military presence,{2018, 2019} yearly mean band occupancy levels were {25.0, 21.9}% in SD and {9.0, 9.9}% in NF for 3.45−3.55 GHz and {14.7, 13.3}% in SD and {13.6, 22.4}% in NF for 3.55−3.65 GHz. At ports with low military presence, {2018, 2019} yearly mean band occupancy levels were {1.0, 0.3}% in SF and {0.3, 0.2}% in AS for 3.45−3.55 GHz and {0.1, 0.0}% in SF and {0.0, 0.1}% in AS for 3.55−3.65 GHz.

Keywords: radar; spectrum sharing; spectrum occupancy; spectrum monitoring; 3550–3650 MHz; Citizens Broadband Radio Service (CBRS); 3450–3550 MHz

Disclaimer: Certain commercial equipment, components, and software may be identified in this report to specify adequately the technical aspects of the reported results. In no case does such identification imply recommendation or endorsement by the National Telecommunications and Information Administration, nor does it imply that the equipment or software identified is necessarily the best available for the particular application or uses.

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