From Bureau of Meteorology
JSON RDF ISO19115-3 XML

SWS Riometer Data, Four Stations in Southern Hemisphere / Antarctica (1987 onwards)

ARCHIVED

Created 07/10/2024

Updated 13/11/2024

JSON RDF ISO19115-3 XML

The SWS WDC ( World Data Centre ) archives Riometer data obtained from Casey, Davis, Mawson and Macquarie Island in Antarctica. The first Riometer data file was obtained on 11/09/1987 from Macquarie Island . Precise start dates per station (as well as the decimal degrees and Glat/Glong) are available from: [ http://www.sws.bom.gov.au/World_Data_Centre/2/4 ].

A riometer (relative ionospheric opacity meter) (30 MHz) is an instrument used to quantify the amount of electromagnetic wave ionospheric absorption in the atmosphere.[1] As the name implies, a riometer measures the "opacity" of the ionosphere to radio noise emanating from distant stars and galaxies. In the absence of any ionospheric absorption, this radio noise, averaged over a sufficiently long period of time, forms a quiet-day curve. Increased ionization in the ionosphere will cause absorption of radio signals (both terrestrial and extraterrestrial), and a departure from the quiet-day curve. The difference between the quiet-day curve and the riometer signal is an indicator of the amount of absorption, and is measured in decibels. Riometers are generally passive radio antenna operating in the VHF radio frequency range (~30 MHz).

Previously the cosmic radio noise was typically measured at around 20-50 MHz with wide-beam antennas. Lately, however, a new generation of imaging riometers has appeared. They consist of an array (8 x 8 or so) of wire dipoles forming narrow antenna beams which cover, in total, an area of 100 km x 100 km or more at 90 km altitude. See Detrick and Rosenber (1990) for more discussion on riometer techniques.

Data frequency :Daily file;

Files and APIs

Tags

Additional Info

Field Value
Title SWS Riometer Data, Four Stations in Southern Hemisphere / Antarctica (1987 onwards)
Language eng
Licence notspecified
Landing Page https://devweb.dga.links.com.au/data/dataset/5547c8a8-d506-409b-a8e7-14057329b0c2
Contact Point
Bureau of Meteorology
sws_wdc@bom.gov.au
Reference Period 24/06/2017
Geospatial Coverage {"type": "Polygon", "coordinates": [[[55.8984375, -79.8046875], [164.17968750000003, -79.8046875], [164.17968750000003, -39.0234375], [55.8984375, -39.0234375], [55.8984375, -79.8046875]]]}
Data Portal data.gov.au

Data Source

This dataset was originally found on Bureau of Meteorology "SWS Riometer Data, Four Stations in Southern Hemisphere / Antarctica (1987 onwards)". Please visit the source to access the original metadata of the dataset:
http://www.bom.gov.au/geonetwork/srv/eng/csw/dataset/sws-riometer-data-four-stations-in-southern-hemisphere-antarctica-1987-onwards

Original dataset
Dataset copies

No duplicate datasets found.