Difference between revisions of "HFI-Validation"

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Both analysis converge to show that the 4 K lines residual represent 2% to 2.5% maximum of the noise level at particular ell values affected by the 4 K lines (such as ell=1800). These residuals are well below the one-sigma discrepancy of the noise itself at the same particular ell values.  
 
Both analysis converge to show that the 4 K lines residual represent 2% to 2.5% maximum of the noise level at particular ell values affected by the 4 K lines (such as ell=1800). These residuals are well below the one-sigma discrepancy of the noise itself at the same particular ell values.  
  
Hence the 4 K lines residuals are negligible. Nevertheless, the correlation between the 4 K lines and the ADC correction discussed in {{PlanckPapers|planck2013-p03}}{{P2013|6}} may have an impact on the gain variation estimates at the end of the processing. This has still to be quantified.
+
Hence the 4 K lines residuals are negligible. Nevertheless, the correlation between the 4K lines and the ADC correction discussed in {{PlanckPapers|planck2013-p03}}{{P2013|6}} may have an impact on the gain variation estimates at the end of the processing. This has still to be quantified.
  
 
===Saturation===
 
===Saturation===

Revision as of 16:54, 29 January 2015


The HFI validation is mostly modular. That is, each part of the pipeline, be it timeline processing, map-making, or any other, validates the results of its work at each step of the processing, looking specifically for known issues. In addition, we do additional validation with an eye towards overall system integrity by looking at generic differences between sets of maps, in which most problems will become apparent, whether known or not. Both these are described below.

Expected systematics and tests (bottom-up approach)[edit]

Like all experiments, Planck/HFI had a number of "issues" which it needed to track and verify were not compromising the data. While these are discussed in appropriate sections, here we gather them together to give brief summaries of the issues and refer the reader to the appropriate section for more details.

Generic approach to systematics[edit]

This section is Under Construction


References[edit]

(Planck) High Frequency Instrument

random telegraphic signal

Cosmic Microwave background

analog to digital converter