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combined differential photometric precision

(CDPP)
(calculated relation of photometric variation to SNR)

The term combined differential photometric precision (CDPP) has been used for a particular calculation performed in processing Kepler Telescope (and TESS and similar) data. It is a measure of the precision achieved by the processing that includes statistical techniques and accommodation for systematic errors. It can be thought of as an observation's brightness-difference in parts per million (PPM) that represents a signal-to-noise ratio of 1.


(measure,ratio)
Further reading:
https://ui.adsabs.harvard.edu/abs/2012PASP..124.1279C/abstract
https://ntrs.nasa.gov/api/citations/20110010911/downloads/20110010911.pdf
https://exoplanetarchive.ipac.caltech.edu/docs/API_keplerstellar_columns.html#rrmscdpp

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