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
