The study of the solar wind using interplanetary scintillation observations from the MRAO, Cambridge, array

Details The study of the solar wind using interplanetary scintillation observations from the MRAO, Cambridge, array The study of the solar wind using interplanetary scintillation observations from the MRAO, Cambridge, array

Apr 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jbis...47..164m&link_type=abstract

British Interplanetary Society, Journal (ISSN 0007-094X), vol. 47, no. 4, p. 164-168

Astronomy and Astrophysics

Astronomy

1

Geomagnetism, Plasma Interactions, Scintillation Counters, Solar Corona, Solar Wind, Electron Density (Concentration), H Alpha Line, Mapping, Remote Sensing, Time Series Analysis

Scientific paper

The daily monitoring of short time intensity fluctuations of astronomical radio sources by an array at the Mullard Radio Astronomy Observatory (MRAO), Cambridge, provides one of the few remote sensing techniques for studying the large scale structure of the near-Earth heliosphere. It has the potential to provide a forecast of interplanetary conditions upstream of the Earth. The array, which operates at 81.5 MHz, was refurbished in 1989/1990 and observations of the 0.5 AU to greater than 1 AU heliopsphere are now available for over 2 years of essentially continuous operation. After an introduction to the interplanetary scintillation (IPS) technique we review the overall character of the IPS results for 1991. As the coronoa is the source of the solar wind we indicate how large scale changes in the solar corona in 1991, from a near maximum to a more minimum like structure, were reflected in the IPS data. We also show, by way of a case study for two discrete events, how the MRAO IPS data may be used to investigate the solar sources and subsequent geomagnetic response to specific interplanetary plasma features.

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