Day time observations of precursors at low latitude

Abstract

Whistler precursors observed during day time at low latitude ground station Gulmarg (Geomag. Lat. 24° 10′ N) and their morphological features are reported. Transverse resonance interaction between whistler mode wave and counter streaming energetic electrons as the probable generation mechanism has been worked out. Minimum anisotropy required for wave amplification, parallel energy of resonating electrons and wave growth rate relevant to generation mechanism is studied. © 1996 Kluwer Academic Publishers.