Difference: HipeWhatsNew10x (41 vs. 42)

Revision 422012-12-18 - EdwardPolehampton

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Calibration Products

Added:
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Photometer

  • No changes
 

Spectrometer

  • Telescope model coefficients updated, and separate coefficients added for off-axis detectors - this reduces the additive offset due to the telescope model subtraction, both in the centre detectors, and in off-axis detectors.
Changed:
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  • The split beamParam, teleRsrf and instRsrf for the two BSM positions (before and after OD1011) lead to significantly better overall calibration for observations after OD1011. For faint sources this helps with the background subtraction using off-axis detectors.
  • The LR calibration is improved by adding additional observations into the average used for the teleRsrf and instRsrf
  • The noise level in mapping observations is improved for longer observations as the teleRsrf for off-centre jiggle positions is now deeper.
  • The updated beam profile and new spatial correction coefficient allow the Semi-extended correction tool to work (prototype is included in v10).
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  • The beamParam, teleRsrf and instRsrf products have been updated to provide a separate calibration for ODs after 1011. At this point the position of the BSM was corrected to be on-axis. This split in the calibration (before and after OD1011) leads to significantly better overall calibration for observations after OD1011. For faint sources this helps when background subtraction is carried out using off-axis detectors.
  • The LR calibration has been improved by adding additional observations into the average used for the teleRsrf and instRsrf
  • The noise level in mapping observations has been improved for longer observations by making the teleRsrf for off-centre jiggle positions deeper.
  • The beam profile product has been updated with the fitted 2D frequency-dependent beam shape
  • A new Spatial Correction Coefficient calibration product has been defined for use when correcting semi-extended sources. This is used in a tool being developed for this correction.
  • The MR and apodized calibration products have been cleaned up from the calibration tree as these are not used in the v10 pipeline - this makes the calibration tree smaller.
 

Calibration Framework

Preprocessing

Changed:
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  • The Pcal products now have correctly filled in metadata.
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  • The Pcal products attatched to the calibration context now have correctly filled in metadata.
 

Engineering Conversion

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Spectrometer Pipeline

Changed:
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  • History is now propagated from level-1 products to level-2 products when spirePreprocessCube and spireProjection are used in the spectrometer pipeline.
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  • Apodization is now carried out at the end of the pipeline after calibration of the final spectra - this is done using an inverse Fourier transform, applying the apodization function and re-applying the forward Fourier transform. This means that separate calibration products for apodized data are no longer needed, and in principle any apodization function can be applied (although the aNB_15 function is still the recommended one).
  • The wavelet deglitcher task now works with multiple processing threads.
  • History is now propagated from Level-1 products to Level-2 products when spirePreprocessCube and spireProjection are used in the spectrometer pipeline.
 

Source extraction

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Interactive Analysis and Tools

Added:
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  • Observation Viewer:
    • Information is displayed in the viewer to show the building block names for Level 0 and Level 0.5 products

Photometer

  • convolutionMapper
    • New task to create a kernel-filtered map directly from photometer timeline data

Spectrometer

 
  • SpectrometerDetectorSpectrum (SDS) products have more functionality
Changed:
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    • Can be opened and used in the Spectrum Explorer
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    • Can be opened and used in the Herschel Spectrum Explorer
 
    • More tasks available
    • Arithmetic operations (+, -, *, /) work in scripts, when performing calculations between an SDS product and either another SDS product, a spectrum, or a number
Deleted:
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  • Observation Viewer:
    • More information displayed in the viewer for level 0 and level 0.5 products
 
  • SDS Explorer
Changed:
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    • N-E arrows added to show orientation of the arrays
  • convolutionMapper
    • New task to create a kernel-filtered map directly from timeline data
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    • N-E arrows added to show orientation of the spectrometer arrays
  • A prototype for a new tool to correct semi-extended sources (due to coupling with the beam) was added - note that this is a prototype and is not explained in the documentation yet - please contact the helpdesk/FTS support group for details.
 

Documentation

 
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