AN INVESTIGATION OF HF DIRECTION-FINDING ACCURACY ON THE FROBISHER BAY-OTTAWA AURORAL ZONE PATH

Authors
  1. Venier, G.O.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN)
Abstract
The CRC HF direction-finding array, consisting of a 1181 meter by 236 meter cross, was used to make angle of arrival measurements of waves transmitted over a 2100 km path whose mid point was near the centre of the auroral zone. Swept-frequency transmissions allowed the investigation of the angle variations of individual propagation modes, and fixed-frequency transmissions permitted the measurement of Doppler shifts as well as the sampling of the phase fronts at relatively high rates. Two azimuth-estimation techniques were tested on the fixed-frequency data. One used a phase-front planarity test and averaging over relatively frequent samples while the other was based on the separation of modes by Doppler processing. The former technique was found to provide slightly better results than the latter on these data, and its accuracy was, in most cases, close to that which could be obtained from the best mode when separated using swept frequency data.
Report Number
TN-703 —
Date of publication
15 Jul 1980
Number of Pages
39
DSTKIM No
80-03409
CANDIS No
91087
Format(s):
Hardcopy;Originator's fiche received by DSIS

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