T. John et Sc. Garg, BALLOON MEASUREMENT OF THE VERTICAL PROFILE OF ATMOSPHERIC ELECTRICAL-CONDUCTIVITY OVER HYDERABAD, Indian journal of radio & space physics, 22(4), 1993, pp. 220-224
Vertical profiles of positive and negative ionic conductivities measur
ed by using a balloon-borne Langmuir probe payload launched from Hyder
abad on 22 Apr. 1989 are presented. The measurements were free from ve
ry large gondola charging reported for several earlier flights from Hy
derabad. The results obtained indicate a close agreement with the mode
l based on cosmic ray ionization.