59. The HMI Vector Magnetic Field Synoptic Charts

Contributed by Yang Liu. Posted on August 31, 2016

HMI now routinely produces vector magnetic field synoptic charts. This Nugget describes the data reduction procedures and the method chosen to resolve the 180-degree ambiguity in azimuth.

58. Signs of Cycle 25 Seen in the Surface Toroidal Field

Contributed by William Ma. Posted on August 3, 2016

Using a combination of the magnetograms, we find signs of the beginning of the 25th cycle from both HMI and WSO by calculating the inclination angles determined from the variation in line of sight field during a disk passage.

HMI Science Nuggets

Monthly Archives: August 2016

59. The HMI Vector Magnetic Field Synoptic Charts

58. Signs of Cycle 25 Seen in the Surface Toroidal Field