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|870 - GBF - Goose Bay HF Radar|
Instrument Type: Instrument > Radar > CoherentIonosphericRadar > HFRadar
Observation Site: GBF - Goose Bay HF Radar
Instrument Page: GBFDescription:
The Goose Bay HF radar is located in central Labrador (53.3 deg N, 299.56 deg E) and overlooks a section of ionosphere poleward of 55 deg N that covers northeastern Canada (Labrador, Baffin Island), the Davis Strait and Baffin Bay, and southern and central Greenland. It has operated since 1983. The facility is part of the SuperDARN network of HF radars that extends from western North America to Scandinavia in the Northern hemisphere and covers much of Antarctica in the Southern hemisphere. The SuperDARN radar for the most direct 2-D merging of Goose Bay velocity data is located at Stokkseyri in western Iceland. The radar forms and steers its beam by the phasing of transmissions from 16 elements in a linear antenna array. A second array was added in 1985 to provide the capability to measure elevation angle. The basic radar operation consists of the following steps: i) selection of a beam position (0-15), ii) search for the quietest 5-kHz channel about the assigned transmitting frequency (8-20 MHz), iii) repeated transmission of a multi-pulse sequence over the selected integration period and reception of backscattered signal with gating in range (1-50), and iv) calculation of the auto-correlation functions (ACFs). These operations are usually carried out in sequence for the 16 beam positions, which collectively constitute 1 scan. Typical beam integration times are 5 and 6 sec, corresponding to scan repeat times of 80 and 96 sec, respectively. Within a scan, beam 0 corresponds to the most westward beam position and beam 15 to the most eastward. The azimuth sector scanned is eastward approximately 50 deg wide and is centered on 5 deg E of N.