Abstract
The Mount Wilson Observatory has obtained daily full disk digital magnetograms of the Sun since 1966, with 12 to 17 arcsecond resolution. As each magnetogram is taken, the position of the Doppler line shift compensator is also recorded, thus giving a full disk map of the longitudinal velocity. This entire dataset is currently being rereduced on a uniform basis (Howard et al., 1980), and daily arrays of residual velocities are being formed by removing large scale patterns, e.g., Earth’s motions, solar rotation, limbshift. Data from the years 1972 through 1978 are used here.
The Hale Observatories are operated jointly by the Carnegie Institution of Washington and the California Institute of Technology.
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References
Gilman, P. A.: 1979, Astrophys. J., 231, pp. 284–292.
Howard, R., Boyden, J. E., and LaBonte, B. J.: 1980, 66, pp. 167. Solar Phys.
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LaBonte, B.J., Howard, R. (1980). Search for Giant Cells in the Solar Convection Zone. In: Dryer, M., Tandberg-Hanssen, E. (eds) Solar and Interplanetary Dynamics. International Astronomical Union / Union Astronomique Internationale, vol 91. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9100-2_2
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DOI: https://doi.org/10.1007/978-94-009-9100-2_2
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