Difference: HipeWhatsNew9x (35 vs. 36)

Revision 362012-05-02 - CarolynMcCoey

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META TOPICPARENT name="HipeWhatsNew"

What's new in HIPE 9

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Spectra

Display

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  • Major updates to Spectrum Explorer to improve performance and provide more direct control over plot appearance
 

Analysis

  • The Smooth task is corrected for a bug in the ZEROS option.
    • As a consequence of this fix, which is more mathematically correct, it is found that smoothed spectra for SPIRE are quite changed. It is recommended instead to use the REPEAT option.
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  • Introduction of a new "Accumulate" task allowing to automatically combine data taken on different frequency grids, with or without frequency overlap.
 

Data cubes

Display

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Level 2 Pipeline

  • doAvg now honours user-defined flags, RowMask.IGNORE_DATA and HifiMask.IGNORE_DATA
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Level 2.5 Pipeline

  • Introduction of a level 2.5 pipeline
    • cube creation is moved from the level 2 pipeline to the level 2.5 pipeline for mapping observations (see Cube Creation section for updates to gridding done in the pipeline)
    • deconvolution is done for spectral scan observations (see Data Processing Tools -> Deconvolution section for updates to deconvolution done in the pipeline)
    • the browse product for all observing modes is done (see HIFI Products section for updates to browse products)
 

HIFI Products

  • Level 2.5 product introduced: for Spectral Scans it holds the deconvolved single sideband soluions; for Maps it holds the cubes; for all cases it holds a copy of the level 2 HTP.
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  • Observing band is added to HTP metadata

HIFI Spectrum Toolbox

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Spectrum Explorer (HIFI specifics)

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  • Introduction of a HIFI task panel in the Spectrum Explorer. Still in development
 

Spectrum tasks (HIFI specifics)

  • ConvertK2Jy now uses the same scheme as doGridding to select frequency when interpolating the efficiency values from the calibration tree: the task searches first for the LO Frequency in the metadata, if it is not found the task looks in the metadata for the value inserted in HSpot. If neither are found then the middle frequency of the observing band (e.g. band 1a) is used.
  • Bug fix in ConvertK2Jy: non-zero source size data on frequency scale can now be converted to Jy
Changed:
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  • introduction of a new "accumulate" task allowing to automatically combine data taken on different frequency grids, with or without frequency overlap.
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  • ConvertK2Jy will accept data with any wavescale
 

HIFI Data Processing Tools

Standing Wave Removal

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Deconvolution

  • When multiple observations are passed to doDeconvolution the metadata are now concatenated and put into the decon_result
  • doDeconvolution made more robust against failure when there are many bad datasets in the HTP.
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  • A median subtraction is possible prior to running doDeconvolution.
 

Spectral Cube creation

  • Default output of doGridding changed from a cubes array to a MapContext, this will affect scripts in which a cube is extracted from the output of doGridding. See the HIFI Data Reduction Guide "How to make a Spectral Cube" chapter.
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  • The comoving option is now automatically turned on for mapping observations of Solar System Objects
  • Fix to a bug in the way the pixel size was calculated for strip maps
  • Data marked as BAD are ignored during the cube creation.
 

flagTool

  • The flagTool task introduced in HIPE 8 is now fully functional and can process both spectrometers, both polarizations, and both subbands in one go.
 
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