【Tytle】

Riometer

【Sub-Tytle】

 Ionospheric absorption

【Observaion Period】

 1967 Feb. 8 - present

【Observation Photo】

【Data Summary】

 Ionospheric absorption of cosmic radio noise has been observed with a standard riometer (relative ionospheric opacity meter) at Syowa Station, Antarctica since February 8, 1967. The observation has been performed with a frequency of 30MHz since the begining. Observations with frequencies of 10, 20, 40, 45, and 50MHz were held in some periods.
The receiver of the standard riometer has a center frequency of 30 MHz and the band width of 7.5 kHz. It is connected to a vertically directed five-element Yagi antenna whose elements are oriented in the east-west direction. Caribration signal is applied from a reference noise diode to the riometer with power corresponding to 20000 K, 16000 K, 12000 K, 8000 K, and 4000 K once a day.

　

　

【Data Name】

 Riometer

【Data Location】

 Syowa Station (69.00S, 39.58E)

【Data Format】

 Data plot in the data report (JARE DATA REPORTS) or digital data

【Data Period】

 1967 Feb. 8 - present

【Data Recording / Acquisition Sampling】

Continuous recording, 1 Hz

【Observation Instruments】

Standard riometer (relative ionospheric opacity meter) at 30 MHz

【Data Publication】

 http://wdc.nict.go.jp/IONO/ANTARCTIC/rods/index_e.html

Metadata/AMD: Riometer (Relative Ionospheric Opacity Meter) Data

【Data Sample】　　　　　　　　

(Figure Title) Riometer data of June 7, 2004

【Data Center (Contact Person)】

National Institute of Information and Communications Technology (Minoru Kubota)

【e-mail】

【Related Organization】

 National Institute of Polar Research

【Scientific Results / Publication】

 JARE DATA REPORT (IONOSPHERE 1, 3, 4, 5, 7, 8, 11, 13, 15, 17, 19, 20, 22, 26, 27, 29, 31, 33, 35, 37, 39, 42, 44, 47, 49, 52, 54, 55, 58, 61, 63, 66, 67, 69, 71, 73, 74, 75, 76, 77)