Irregular Type Sporadic-E Observed by Rocket Borne Gyro-Plasma Probe at a Temperate Latitude

By a gyro-plasma probe experiment on board K-9M-21 rocket the micro-structure of the electron density profile has been measured within an error of ±3%. Irregularity of the electron density fluctuating within ±20% of its average has been detected in altitude ranges of 100km-103km and 115km-120km independent of the wake effect of the vehicle motion. This irregularity is identified with the radio scattering source of diffuse type sporadic-E on the ionogram obtained during the rocket flight.