Interferometry and Granulation

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Interferometry and Stellar Convection -- the Easy Part

For a number of stars with different parameters:
Radius determinations (indirectly: mixing-length parameter)
Limb-darkening measurements (photospheric temperature structure)

Interferometry and Stellar Granulation -- the Tricky Part

Unresolved observations (spectra, photometry, low-res images): ambiguous
Imaging: short time-sequence of snapshots with 30 x 30 pixel at two different wavelengths