Whistler precursors observed during day time at low latitude ground st
ation Gulmarg (Geomag. Lat. 24 degrees 10' N) and their morphological
features are reported. Transverse resonance interaction between whistl
er 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 w
ave growth rate relevant to generation mechanism is studied.