OBSERVATIONS OF DISCRETE EMISSIONS AT THE LOW-LATITUDE GROUND STATIONGULMARG

This paper presents discrete chorus type emissions observed in January /July, 1970 during the routine recording of whistlers and VLF emission s at our low latitude ground station Gulmarg (geomag. lat., 24-degrees -26'N; geomag. long., 147-degrees-09'E). The chorus type emissions are comprised of discrete, sometimes overlapping, tones of one or more sp ectral shapes (risers, falling tones, hooks, etc.). It is shown that t hese emissions are generated in the equatorial plane (L approximately 1.2) by cyclotron resonance between the propagating wave and gyrating electrons.