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Fig. 4


Total-to-thermal noise ratio. For the phase noise calculation we use a PWV  = 1.0 mm with a deviation of ΔPWV  = 0.15 mm, with an exposure time of two hours. Different line styles represent different wavelengths. Thanks to the sequential simulation process of thermal and phase noise, ratios below 1.00 are possible, because the phase and thermal noise can erase each other.

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