MDI Calibration Notes and Known Problems

The following pages contain descriptions of MDI data calibration procedures and known problems. This information is organized by items that affect all MDI data, items that are common to all datasets based on a particular observable, and items specific to a given image format.

Each page includes a list of affected data products, a detailed description of the problem and possible solution, and a correction table if we have one.

This page is under development and is by no means complete.

All MDI Data Products
- Plots of MDI Calib data
Observables
Magnetic Field Data

Nonlinearity

Incorrect BZERO

Shutter Interference

High Field Saturation

Continuum Intensity-Related Data

Bad Flat Field

Incorrect correction due to window opacity

Flat field correction images

Doppler Data

Less Than Optimal Calibration
Image Format

fd - Full Disk 2-arcsec pixels
hr - High Res 0.6-arcsec pixels
vw - "Vector Weighted" medium-l
loi - LOI proxy averages
rwbin - 128x128 binned data
limb data