Application of matched filtering to short whistlers recorded at low latitudes

The matched filtering and parameter estimation technique has been successfully used to analyze short whistlers (frequency range ∼1 kHz ) recorded at low-latitude station Jammu (geom. lat.=22°16′N, L=1.17), India. The analyzed whistlers recorded on June 5, 1997 during magnetically quiet period are found to have propagated along higher L-values ( L>3.5). In some cases there is no correspondence in their dispersion value and derived L-value, which shows the complexity of the propagation mechanism. Trace-splitting and fine structure present in dynamic spectra may yield additional information about the propagation mechanism.