Simultaneous electric and magnetic field observations of Pc1-2, and Pc3 pulsations

摘要: This paper presents results from a combined analysis of ULF fluctuations in the geoelectric and geomagnetic fields. Data were obtained at South Pole station during 1985–1986 Balloon Campaign. Magnetic field perturbations measured by two-axis induction or “search coil” magnetometer station. Vector electric data standard double-probe experiment on balloon payloads. The objective this study is to investigate relationship between magnetic components micropulsations Pc1–3 frequency bands (0.01 0.5 Hz). entire 468-hour database campaign has been searched for examples strong discrete micropulsation emissions these bands. two best days found be January 7 8, 1986. Two seen both days, Pc3 emission 30 40 mHz that extended about 3 hours either side noon Pc1–2 started around lasted several hours. amplitude histories roughly comparable when account was taken effect varying precipitation ionospheric conductivity. did not show significant coherence. Consequently, little coherence expected components. An transmission model used interpret observed B/E ratio terms horizontal wave number source. inferred implies phase speed equal simultaneous traveling convection vortex events.