LWS Science Team Meeting, 23 Mar 2004, Boulder1 Using HMI to Study Facular Contrast Functions Thomas Berger SDO Workshop 14 Feb 2006 HMI Magnetograms

LWS Science Team Meeting, 23 Mar 2004, Boulder2 TSI from Spots and Faculae

LWS Science Team Meeting, 23 Mar 2004, Boulder3 Prior Measurements MDI nm continuum data Ortiz, Solanki, et al. A&A, 2002 Spatial resolution = 2” SVST nm continuum data Topka, Tarbell, et al. ApJ, 1997 Spatial resolution = 0.5”  = 0.31 – 0.996

LWS Science Team Meeting, 23 Mar 2004, Boulder4 New Measurements SST G-band AR June-2003  = 0.6  = 53°

LWS Science Team Meeting, 23 Mar 2004, Boulder5 New Measurements SST nm AR June-2003  = 0.6  = 53°

LWS Science Team Meeting, 23 Mar 2004, Boulder6 Replication of prior results Topka et al., ApJ 1997

LWS Science Team Meeting, 23 Mar 2004, Boulder7 Using High Resolution

LWS Science Team Meeting, 23 Mar 2004, Boulder8 HMI and Irradiance HMI Irradiance measurements Full-disk VECTOR magnetogram Continuum contrast (positions 1, 5) Line center contrast (position 3) Regular cadence (e.g. 3X per day for life of mission) Irradiance analyses Continuum contrast vs. flux density vs.  Continuum contrast vs. field strength vs.  Line center contrast vs. same