Annual Solar Wind Speed Maps

Synoptic Source Surface Maps in the Carrington Rotation Number versus Heliographic Latitude.
The Source Surface was assumed to be at 2.5 solar radii. The IPS-CAT method was applied to derive these maps. The data file for each year includes 11 CRs.

Note: "dat 1" from the CAT analysis using only V data (Tokumaru et al., 2010) and "dat 2" from the CAT analysis using V and g data (Tokumaru et al., 2012).

Kojima, M., M. Tokumaru, H. Watanabe, A. Yokobe, K. Asai, B.V. Jackson, and P.L. Hick,"Heliospheric tomography using interplanetary scintillation observations, II. Latitude and heliocentric distance dependence of solar wind structure at 0.1-1 AU",Journal of Geophysical Research, 103, pp1981-1989, 1998.
Kojima, M., M. Tokumaru, K. Fujiki, K. Hayashi, and B. V. Jackson,"IPS tomographic observations of 3D solar wind structure", Astronomical and Astrophysical Transactions, 26, No. 6, 467-476, 2007.
Tokumaru, M., M. Kojima, and K. Fujiki, "Solar cycle evolution of the solar wind speed distribution from 1985 to 2008", Journal of Geophysical Research, 115, A04102, 2010 (doi:10.1029/2009JA014628).
Tokumaru, M., M. Kojima, and K. Fujiki, "Long-term evolution in the global distribution of solar wind speed and density fluctuations during 1997-2009", Journal of Geophysical Research, 117, A06108, 2012 (doi:10.1029/2011JA017379).

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