Some summary images were prepared from data obtained on 5 November demonstrating that MDI was again functioning normally. On 21 December 1998 during a normal momentum management procedure the third and final spacecraft gyro malfunctioned. Analysis of data from the first 26 months of the mission proceeded during the SOHO summer and winter interruptions. Some of the results are seen here. Developing Spot Region Full Disk Observables MDI recommissioning images from Nov 5, 1998.
Images are available both in a combined format and individually.
Go To Top High Resolution Observables MDI recommissioning images from Nov 5, 1998. Images are available both in a combined format and individually. This view shows sound speed variations beneath a sunspot. The spot was observed in June 1998 just prior to the SOHO 4-month interruption. Three planes are shown, on top the intensity at the surface which shows the sunspot with the dark central umbra surrounded by the somewhat brighter, filamentary penumbra.