ON SOME IMPORTANT CHARACTERISTICS OF VHF RADIO-EMISSION ASSOCIATED WITH LARGE EXTENSIVE AIR SHOWERS

Experimental studies of radio-emission are done at 110 MHz and 220 MHz frequency in the VHF region using sophisticated detection and data ac quisition system. Results obtained on i) frequency spectrum and latera l distribution of field strength, ii) variation of field strength (E) with height of shower maximum (H-m), iii) frequency distribution of de pth of shower maximum (X(m)) are presented and are compared with theor etical calculations. An attempt is made to estimate primary mass compo sition by radio method.