Jare Data Reports No. 176 (Ionosphere 47). Riometer Records of 30 Mhz CosmicNoise at Syowa Station, Antarctica in 1990

摘要

At Syowa Station, Antarctica, absorption of cosmic radio noise has been observedwith a standard riometer (relative ionospheric opacity meter) at 30 MHz, since February 1966. This report presents data observed from January 1 to December 31, 1990, in the format of hourly values and combined data plots. Besides riometer data, other observation data are also presented in the combined data plots for reference. These plots include geomagnetic field, HF, VLF, and radar observations. In case of lack of the combined plots, riometer, and geomagnetic field observation data are presented.