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TitleFrequency management system (FMS) for over-the-horizon radar (OTHR) using a near-real-time ionospheric model
AuthorThayaparan, TORCID logo; Villeneuve, H; Themens, DORCID logo; Reid, B; Warrington, E MORCID logo; Cameron, T GORCID logo; Fiori, R A DORCID logo
SourceInternational Radar Symposium conference proceedings; 2022 p. 1-11,
Alt SeriesNatural Resources Canada, Contribution Series 20210672
PublisherInstitute of Electrical and Electronics Engineers
MeetingIRS 2022 - 2022 International Radar Symposium; Gdansk; PL; September 12-14, 2022
Mediapaper; digital; on-line
File formatpdf
ProvinceCanada; British Columbia; Alberta; Saskatchewan; Manitoba; Ontario; Quebec; New Brunswick; Nova Scotia; Prince Edward Island; Newfoundland and Labrador; Northwest Territories; Yukon; Nunavut
NTS1; 2; 3; 10; 11; 12; 13; 14; 15; 16; 20; 21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31; 32; 33; 34; 35; 36; 37; 38; 39; 40; 41; 42; 43; 44; 45; 46; 47; 48; 49; 52; 53; 54; 55; 56; 57; 58; 59; 62; 63; 64; 65; 66; 67; 68; 69; 72; 73; 74; 75; 76; 77; 78; 79; 82; 83; 84; 85; 86; 87; 88; 89; 92; 93; 94; 95; 96; 97; 98; 99; 102; 103; 104; 105; 106; 107; 114O; 114P; 115; 116; 117; 120; 340; 560
Lat/Long WENS-141.0000 -50.0000 90.0000 41.7500
SubjectsScience and Technology; radar methods; ionosphere; frequency distributions; latitude; Arctic; Monitoring and Evaluation; Spectrum management
Illustrationsprofiles; location maps; plots; frequency distribution diagrams; tables
ProgramCanadian Hazard Information Service Geomagnetism and space weather
Released2022 07 21
AbstractSky-wave Over-the-Horizon Radar (OTHR) propagates radio waves off the ionosphere to provide long-range surveillance around the Earth's curvature. Frequency selection for high-latitude and polar OTHRs is challenging unless there is an environmental monitor that addresses the significant ionospheric variability in high-latitude regions, a spectrum monitor that finds unoccupied frequencies in the high frequency (HF) radio wave band, and a frequency management system (FMS) that selects an optimal frequency from the merged results of the environmental monitor and spectrum monitor. This paper describes the first FMS for high-latitude OTHR that merges results from the environmental monitor and spectrum monitor in real-time. The environmental monitor uses the Assimilative Canadian High Arctic Ionospheric Model (A-CHAIM), which assimilates near-real-time data and is, to date, the most advanced ionospheric model for high-latitude regions. Despite remaining limitations, demonstrations of this real-time FMS between a transmitter and four targets during the day and night and during fall and summer show that it could be one of the tools for selecting frequencies for operational scenarios.
Summary(Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, radio communications and GNSS positioning to help Canadian industry understand and mitigate the effects of space weather. A real-time frequency management system (FMS) could improve efficiency of operation of over-the-horizon-radar in high-latitude locations such as Canada's Arctic regions. The FMS collects data from ionospheric models and measurements to recommend useable frequencies for operation. In this paper, the system is shown to work well in real-time. The FMS is now ready for operational use.

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