Ann. Geophysicae 18, 995±1002 �2000) Ó EGS ± Springer-Verlag 2000 Simultaneous interplanetary scintillation and optical measurements of the acceleration of the slow solar wind

• Main Authors: A. R. Breen, C. A. Jordan, P. Thomasson, P. J. Moran, R. A. Fallows, A. Canals, P. J. S. Williams
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Subjects: EISCAT
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.210.2172; http://www.ann-geophys.net/18/995/2000/angeo-18-995-2000.pdf

Abstract. Simultaneous observations of the slow solar wind o € the southeast limb of the Sun were made in May 1999 using optical measurements from the C2 and C3 LASCO coronagraphs on board the SOHO spacecraft and radio-scattering measurements from the MERLIN and EISCAT facilities. The observations show the slow solar wind accelerating outwards from 4.5 solar radii �R), reaching a ®nal velocity of 200±300 km s)1 by 25± 30 R. The acceleration pro®le indicated by these results is more gentle than the average pro®le seen in earlier LASCO observations of larger scale features, but is within the variation seen in these studies. Key words: Interplanetary physics �solar wind plasma; sources of the solar wind; instruments and techniques)