Bias for spectral density estimates of electromagnetic wave field components in a magnetoplasma
Abstract
An evaluation of bias errors in the power spectral densities estimation of the electric and magnetic components of an electromagnetic wave field observed at a fixed point of a magnetoplasma is presented, based on the use of the wave distribution function (WDF) concept developed by Storey and Lefeuvre (1979, 1980) for characterizing random wave fields. The WDF is assumed to be constant over the frequency band of analysis and the waves are considered to propagate in the whistler mode. It is shown that under these conditions the power spectral densities of the magnetic components are unbiased while the power spectral densities of the electric components are systematically biased. In addition, it is shown that in the whistler mode approximation, the bias errors strongly depend on the ratio of the resolution bandwidth to the analysis frequency.
 Publication:

Annales Geophysicae
 Pub Date:
 June 1983
 Bibcode:
 1983AnGeo...1..265L
 Keywords:

 Magnetoplasmadynamics;
 PlasmaElectromagnetic Interaction;
 Space Plasmas;
 Spectrum Analysis;
 Bias;
 Distribution Functions;
 Power Spectra