Activity‐related Changes in Local Solar Acoustic Mode Parameters from Michelson Doppler Imager and Global Oscillations Network Group

2004 ◽  
Vol 608 (1) ◽  
pp. 562-579 ◽  
Author(s):  
R. Howe ◽  
R. W. Komm ◽  
F. Hill ◽  
D. A. Haber ◽  
B. W. Hindman
Keyword(s):  
Acoustic Mode ◽  
Michelson Doppler Imager ◽  
Doppler Imager

Results from proton damage tests on the Michelson Doppler Imager CCD for SOHO

1993 ◽  
Author(s):  
Igor Zayer ◽  
Ira Chapman ◽  
Dexter W. Duncan ◽  
G. A. Kelly ◽  
Keith E. Mitchell
Keyword(s):  
Michelson Doppler Imager ◽  
Doppler Imager

MHD Oscillations Observed in the Solar Photosphere with the Michelson Doppler Imager

1998 ◽  
pp. 453-454 ◽  
Author(s):  
A. A. Norton ◽  
R. K. Ulrich ◽  
R. S. Bogart ◽  
R. I. Bush ◽  
J. T. Hoeksema
Keyword(s):  
Solar Photosphere ◽  
Michelson Doppler Imager ◽  
Doppler Imager

scholarly journals One solar cycle of solar astrometry with MDI/SOHO

2009 ◽  
Vol 5 (S264) ◽  
pp. 21-32 ◽  
Author(s):  
Marcelo Emilio ◽  
Jeff R. Kuhn ◽  
Rock I. Bush
Keyword(s):  
Solar Cycle ◽  
Solar Radius ◽  
Michelson Doppler Imager ◽  
Heliospheric Observatory ◽  
Radius Variation ◽  
Doppler Imager ◽  
Upper Limit ◽  
The Absolute ◽  
The Difference

AbstractIn this work we describe the method and results of precise solar astrometry made with the Michelson Doppler Imager (MDI), on board the Solar and Heliospheric Observatory (SOHO), during one complete solar cycle. We measured an upper limit to the solar radius variation, the absolute solar radius value and the solar shape. Our results are 22 mas peak-to-peak upper limit for the solar radius variation over the solar cycle, the absolute radius was measured as 959.28 ± 0.15 arcsec at 1 AU and the difference between polar and equatorial solar radii in 1997 was 5 km and about three times larger in 2001.

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