Most existing direction-of-arrival(DOA)and polarization estimation methods

which based on electromagnetic vector sensors array

generally assume that the electromagnetic vector sensor orient the referenced Cartesian coordinates strictly

i.e.

no orientation errors exist.While in the practice

the orientation errors are unavoidable

which make the manifold of the vector sensor deviate from the ideal value

and deteriorate the estimation performance of the existing methods.So it is necessary to calibrate the orientation errors of the electromagnetic vector sensors.Based on the first-order Taylor approximation of the manifold and a known source

a new calibration algorithm against the orientation errors of electromagnetic vector sensors is proposed

and the corresponding expressions for the stochastic Cramér-Rao bound(CRB)is derived.The performance of the new method is confirmed through numerical examples.