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What is meant by imaging dynamic range?
Posted by Suzanna Randall, Last modified by on 11 March 2015 10:15 AM
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Images made from interferometric data are usually subject to calibration errors that limit the quality of the image. Errors remaining after phase referencing are most common and move flux around the map, lowering the peak flux density and increasing the image rms. One measure of the quality of an image is the dynamic range, where this is defined as the ratio of the peak flux to the rms. If the source is bright enough, self-calibration can be used to correct for these errors (phase and amplitude) and thus to increase the image dynamic range towards the expected value. Related Knowledgebase article: | |
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