Difference: HifiCalibrationWeb (104 vs. 105)

Revision 1052016-09-26 - DavidTeyssier

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META TOPICPARENT name="WebHome"

HIFI instrument and calibration web page


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NEW NEW NEW Latest updates -- 22 July 2016 NEW NEW NEW
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NEW NEW NEW Latest updates -- 26 September 2016 NEW NEW NEW
 
  • HIPE 14.2 is the latest user release
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  • A new HIFI calibration tree has been released, with very minor updates
 
  • The first version of the HIFI handbook is now available
  • Check the important calibration updates and associated improvements expected in the HIPE 14.0.1 and upcoming 14.1 reprocessed data - this includes in particular updated sideband gain ratio in bands 1 to 4
  • The HIFI products now come with a frequency-dependent intensity calibration uncertainty budget
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Reducing HIFI data

Recommended User release

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  HIPE 14 and Java 8 : please consult the HIPE Known Issues page regarding important information on issues with Java for different versions of HIPE.

Which data would most benefit from being reprocessed in HIPE 14.1/14.2 ?

If your data have been processed with HIPE 14.1

  • Isolated problematic processing with 14.1
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    • A dozen of observations was not properly processed in 14.1 and 14.0.1. The list of those obsids is: 1342197147, 1342210032, 1342216806, 1342219255, 1342219454, 134230216, 1342245299, 1342246507, 1342245997, 1342250406, 1342250721, 1342265972, 1342263227. These observations will be reprocessed correctly with 14.2 - meanwhile, it is possible to use the HIPE 13 products, bearing in mind that all other improvements introduced in the 14.x products will not yet be featured in those products
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    • A dozen of observations was not properly processed in 14.1 and 14.0.1. The list of those obsids is: 1342197147, 1342210032, 1342216806, 1342219255, 1342219454, 134230216, 1342245299, 1342246507, 1342245997, 1342250406, 1342250721, 1342265972, 1342263227, 1342192673, 1342218631. These observations have been reprocessed correctly with 14.2.
  If your data have been processed with HIPE 14.0.1
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    • HiClass task - Note, however, that GILDAS/Class can now directly read the HCSS-generated FITS files (as of release October 2015) and so it is no longer required to convert the HCSS FITS files into a dedicated format. More details about this new FITS reader can be found in this report.
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    • Products readable in GILDAS/CLASS: for products processed with HIPE 12 or later, you can directly read the HCSS-generated FITS files into CLASS (more details about the FITS reader can be found in this report). For products processed with an earlier version, you should use the HiClass task to export data as CLASS readable FITS files. Notes: (1) If you import products processed in HIPE 12 or 13 some warnings will be raised about missing meta-data, but the import will proceed. (2) The FITS file from Level 2 and 2.5 observations downloaded from the HSA are gzipped files. It is recommended to test that the FITS are properly un-zipped before reading to CLASS (for example using the utility ‘fv’ (FITS Viewer) among others). (3) HSC cannot guarantee that future CLASS version will be able read the HCSS-generated FITS files.
 
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  • Information about how to find what calibration version was used on your data, how to get the latest calibration, and reprocess observations with it is found in the Pipeline chapter of the HIFI Data reduction Guide.
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  • The latest calibration tree pool can also be retrieved directly here (1 April 2016).
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  • The latest calibration tree pool can also be retrieved directly here (26 September 2016).
 
  • Updates to the HIFI calibration data are generally concurrent with the release of each major version of the HCSS-HIFI software. However, it is possible to have updates to the calibration data in between major releases of the software as the software and data are independent of each other, in the table below the HIPE or the OD from which the calibration updates apply are given. The calibration versions available since HIPE 5 are listed in the table below:
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22_0 09-04-15   13.0 Update of the beam parameters (coupling efficiencies, HPBW, 2-D beam maps - see also the beam section above), addition of a new table of expected spectral spurs to be masked by the pipeline in Spectral Scans, addition of a database of Electrical Standing Wave correction solution for observations in bands 6 and 7, addition of a new Uncertainty table that will be propagated into an error budget in HIPE 14 (currently only placeholder), introduction of IF-dependent sideband gain ratio (currently only true for the lower end of band 2a), update of the list of corrupted data-frames for flagging at Level 0
24_0 10-12-15   14.0 Major update of all sideband ratio tables. Introduction of uncertainty budget tables. Introduction of spur warning tables for all point and mapping observations. Update of some Electrical Standing Wave correction solutions. Added some spur flag tables for a handful of spectral scans, as well as some remaining corrupted data-frame entries for flagging at level 0. Updated smoothing width for load chop processing in band 6a, allowing to mitigate the affect of strong artefacts present at tunings between 1457 and 1459 GHz.
25_0 01-04-15   14.1 Minor update to table of BBIDs in order to allow processing of a handful of calibration observations.
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26_0 26-09-16   14.2 Minor update to table of spur masks for obsids 1342192673 and 1342218631
 

Outstanding calibration issues

 
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