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What is the difference between products processed with PCD Ephemeris group and products processed with Definitive Ephemeris group?

April 26, 2017definitive difference ephemeris group pcd processed products

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What is the difference between products processed with PCD Ephemeris group and products processed with Definitive Ephemeris group?

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Corrections and interpolations of first ephemeris group are based on whether the external ephemeris data is used or not. The computation of the second ephemeris group relies on definitive or predicted data. In the first case, the product will be defined as processed with consolidated or definitive ephemeris (DEF product) or otherwise is as processed with predicted one (PCD product). Usually, for a same scene (same acquisition date), the PCD product will have absolute location accuracy weaker than the DEF one.