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Ann. Geophys., 18, 1003-1008, 2000
www.ann-geophys.net/18/1003/2000/
© European Geosciences Union 2000
Observations of interplanetary scintillation during the 1998 Whole Sun Month: a comparison between EISCAT, ORT and Nagoya data
P. J. Moran1, S. Ananthakrishnan2, V. Balasubramanian3, A. R. Breen1, A. Canals1, R. A. Fallows1, P. Janardhan4,*, M. Tokumaru5, and P. J. S. Williams1
1Physics Department, University of Wales Aberywyth, Penglais Hill, Aberystwyth, SY23 3BZ, UK
2National Centre for Radio Astrophysics, TIFR, PO Box 3, Ganeshkhind, Pune 411 007, India
3Radio Astronomy Centre, TIFR, PO Box 8, Udhagamandalam 643 001, India
4Department of Astronomy, University of Maryland, College Park, MD 20742, USA
5Solar-Terrestrial Environment Laboratory, Nagoya University, Toyokawa, Aichi 442, Japan
*On leave from the Physical Research Laboratory, Ahmedabad 380 009, India
Correspondence to: P. J. Moran
e-mail: plm@aber.ac.uk
Abstract. Observations of interplanetary scintillation
(IPS) allow accurate solar wind velocity measurements to be made at all
heliographic latitudes and at a range of distances from the Sun. The data may be
obtained with either single, double or multiple antennas, each requiring a
different method of analysis. IPS data taken during the 1998 whole sun month
(30th July-31st August 1998) by EISCAT, the ORT (Ooty Radio Telescope), India,
and the Nagoya IPS system, Japan, allow the results of individual methods of
analysis to be compared. Good agreement is found between the velocity
measurements using each method, and when combined an improved understanding of
the structure of the solar wind can be obtained.
Key words: Interplanetary physics (solar wind plasma;
sources of the solar wind) - Solar physics, astrophysics and astronomy
(instruments and techniques)
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