Summary for H6

Five talks were given on the issues in inversions and peak fitting. Each of the speakers was asked for their opinion on the highest-priority issue that must be addressed before the SDO Launch. There was a different opinion from each speaker:

Thompson: Better assessment of the input errors, particularly correlated errors.
Howe: High-degree mode fits.
Rhodes: An improved model of the profile asymmetry.
Korzennik: Incorporate better knowledge of the instrument into the fitting procedure.
Jefferies: Better computation of high-degree leaks.

Note that all of these issues can be collected under one task: improved mode estimation. Thus, the group discussed how to make progress on that task. One path is to compare the five existing codes (NSO/GONG, Stanford, USC, CfA, UH) with common MDI and GONG data sets, and to generate an artifical data set with known input parameters. NSO/GONG has agreed to organize the exercise, which should begin in April. The probable participants are Hill, Howe, Rhodes, Schou, Korzennik, Jefferies with fitting techniques; Hill and Schou to provide data sets, and Toutain to generate artificial data.