磁性方位角轴承是近似。

Magnetic azimuth bearings are approximate.

youdao

精确解与近似解的差异不仅表现在A4值的大小及符号（正负），而且表现在A4随方位的变化特征。

The exact and approximate solutions are different in the magnitude and signs (positive and negative) of A4 as well as the variations with azimuths.

youdao

通过对近场空间协方差矩阵进行修正，用重构在相同方位上的远场近似空间协方差矩阵确定声源方位角。

By using the reconstructed far-field approximation space covariance matrix at the same bearings from the revised near-field space covariance matrix, the bearings of multiple sources can be obtained.

youdao