标题：Measurement of Quiet-Time Electric Field in the Lower Ionosphere by the Antarctic Sounding Rocket S-210JA-29 (b. Electric Fields and Current System) (Proceeding of the Second Symposium on Coordinated Observations of the Ionosphere and Magnetosphere in the
其他标题：南極ロケットS-210JA-29号機による静穏時下部電離層電場の観測(b.電場と電流系)(第2回極域における電離圏磁気圏総合観測シンポジウム : Part I)
摘要：Quiet-time DC and AC (18-220 Hz) electric fields were observed in the lower ionosphere up to 118 km by means of spherical double probes on board the sounding rocket S-210JA-29 which was launched from Syowa Station at 16.15 UT on July 12, 1977 The DC electric field intensity was～10 mV/m in the lower E region where the electron density was 2-3×10^4 cm^<-3>, while it increased sharply up to ～130 mV/m above the altitude of ～110 km with a good correlation with the decrease in the electron density. 0nly weak AC noise was observed in the whole altitude range.
