Difference between revisions of "DatesObs"

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=== Overview ===
 
The DATESOBS files are not official Planck products but are provided for the convenience of the community. They contain timing information sampled by UTC day for investigation of inter-survey source variability and comparison with external observations.  
 
The DATESOBS files are not official Planck products but are provided for the convenience of the community. They contain timing information sampled by UTC day for investigation of inter-survey source variability and comparison with external observations.  
  
 +
=== File Format ===
 
There are 27 files for all combinations of instrument band and survey. The files themselves are:
 
There are 27 files for all combinations of instrument band and survey. The files themselves are:
 
* FITS format, with data in the first extension
 
* FITS format, with data in the first extension

Revision as of 00:24, 12 March 2013

Overview[edit]

The DATESOBS files are not official Planck products but are provided for the convenience of the community. They contain timing information sampled by UTC day for investigation of inter-survey source variability and comparison with external observations.

File Format[edit]

There are 27 files for all combinations of instrument band and survey. The files themselves are:

  • FITS format, with data in the first extension
  • RING-ordered HEALPIX
  • NSIDE 1024 for LFI, and 2048 for HFI

They contain two fields:

  • DATESOBS - list of UTC days on which the pixel was observed.
  • NUMOBS - The number of UTC days on which the pixel was observed.

Universal Time Coordinate(d)

Flexible Image Transfer Specification

(Planck) Low Frequency Instrument

(Planck) High Frequency Instrument