A SAMPLING ARRAY FOR HF DIRECTION-FINDING RESEARCH

Authors
  1. Rice, D.W.
  2. Winacott, E.L.
Corporate Authors
Communications Research Centre, Ottawa ONT (CAN);Chief of Research and Development, Ottawa ONT (CAN)
Abstract
The report describes a sampled-aperture receiving antenna system composed of two orthogonal arrays; one of 58 elements over an aperture of 1181 metres, the other of 32 elements over an aperture of 236 metres. The array is used to study ionospheric phenomena which limit the accuracy of direction-finding measurements in the HF band. The equipment associated with the array includes a 90-channel phase-stable receiving system, and a computer-based data-acquisition and data-processing system. The array may be used to receive either fixed-frequency or swept-frequency continuous wave (SFCW) transmissions. In the latter case, processing of the SFCW signal provides high time-delay resolution which permits the separation of ionospheric modes. By exchanging antenna elements, the array may be used for study of either obliquely-propagated or vertically-incident signals.
Report Number
TELS-44 —
Date of publication
15 Nov 1977
Number of Pages
43
DSTKIM No
77-04731
CANDIS No
101403
Format(s):
Hardcopy;Originator's fiche received by DSIS

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