MAPPING OCEAN SURFACE VECTOR CURRENTS BY DUAL HF GROUND WAVE RADARS
高频地波雷达生成海洋表面矢量流图

Dual HF ground wave radars system OSMAR2000 developed by Wuhan University maps ocean surface vector currents by use of two radial current maps measured by both radars The classical algorithm for vector currents mapping cannot be applied in the system directly In this paper,an alternative algorithm applicable in OSMAR2000 is developed We interpolate radial currents mapped by each radar to a common grid via natural boundary cubic spline under the polar reference frame,and then combine them into vector currents In the East China Sea experiment the vector currents mapped by OSMAR2000 well coincided with the concurrent measurements by in situ conventional ocean current meters Comparison data show that the algorithm developed by this paper is applicable in OSMAR2000 and it works better than the algorithm on the basis of linear interpolation on radial currents