Observability and UV-Coverage

By increasing the number of telescopes Nt, although this is a more expensive solution, the number of available baselines Nb is increased and is given by 

To further increase the Mv-sampling one can use multiple spectral bands. Assuming that an object s shape is achromatic with regards to the wavelength, the Mv-coverage is increased simply because different wavelengths represent different spatial frequencies for a given baseline (Millour 2008). 

As presented before, the measurement of an interferometer is related to the Fourier transform of the object brightness. In order to maximise the efficiency of 

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