The different analyses:
What is the shot noise in the mdi images?
Is the time-distance noise caused by shot noise in the images?
Is the power change at hi l related to focus changes?
Is the scale in the structure in the noise in time-distance maps related to the p-mode wavelength?
Do the time-distance results improve when the images are in better focus?
Can we detect minute to minute variations in the center position with a correlation analysis?
Head to head test of phase speed filtering versus a frequency filter.