In interferometry, the zero spacing flux (ZSF) refers to the estimated integrated flux density within the field of view of an interferometer that would be measured by a (potentially hypothetical) single-dish telescope possessing the same primary beam as the interferometer. This value does not represent a direct measurement, but rather an extrapolation based on both single-dish observation and interferometric data.
In interferometry, the zero spacing flux (ZSF) refers to the estimated integrated flux density within the field of view of an interferometer that would be measured by a (potentially hypothetical) single-dish telescope possessing the same primary beam as the interferometer. This value does not represent a direct measurement, but rather an extrapolation based on both single-dish observation and interferometric data.
Source: Wikipedia "Zero spacing flux" · CC BY-SA 4.0
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