Difference between revisions of "NPIPE reprocessing"
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Latest revision as of 18:47, 20 March 2023
NPIPE reprocessing is a full-frequency or detector-set-wide processing step. It covers the entire span of the Planck mission. During reprocessing, NPIPE corrects systematics in the time-ordered data by fitting time-domain systematics templates. The templates being fitted are:
- gain fluctuations;
- bandpass mismatch;
- ADC nonlinearity;
- bolometric transfer-function residuals;
- zodiacal light;
- far sidelobe signal.
In addition, NPIPE breaks certain large-scale degeneracies in the fitting by making an approximation that the sky polarization at 44-143GHz can be modelled as a linear combination of the 30-, 217-, and 353-GHz polarization maps. These polarization templates are unrolled into the time domain in the reprocessing step.
Below is the schematic of the reprocessing sub pipeline. The diagram is reproduced from A&A 643, A42 (2020).
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