.. _MERBksMosaic:


Background-Subtracted Mosaic Product
====================================



Data Product Name
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.. DataProductNameStart

DpdMerBksMosaic

.. DataProductNameEnd


Data Product Custodian
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.. DataProductCustodianStart



.. DataProductCustodianEnd


Name of the Schema File
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.. NameSchemaStart

.. raw:: html 

    <a href="https://gitlab.euclid-sgs.uk/ST-DM/ST_DataModel/-/blob/9.2.0/ST_DM_Schema/auxdir/ST_DM_Schema/dpd/mer/euc-mer-BksMosaic.xsd" target="_blank">euc-mer-BksMosaic.xsd</a>

.. NameSchemaEnd


Last Edited for DPDD Version
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.. DpddVersionlTagStart

1.2

.. DpddVersionTagEnd


Processing Elements Creating / Updating / Using the Product
___________________________________________________________
.. PECreatorStart

**Creators:**

* MER_Background
* MER_CatalogPsfCalculation
* MER_Compression


**Consumers:**

* MER_Detection
* MER_CatalogPsfCalculation
* MER_PsfExtraction
* MER_LowResPsfExtraction
* MER_Kernel
* MER_Morphology
* MER_Photometry
* MER_CatalogAssembly
* MER_Compression
* MER_MorphoPatch
* MER_Validation

.. PECreatorEnd


Processing Function Using the Product
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.. PFUsingStart

MER, SIR, SHE

.. PFUsingEnd


Proposed for Inclusion in EAS/SAS
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.. IncludeInSASStart

This product is proposed for inclusion in the SAS: yes

These products combine all the imaging data that overlap the MER tiles, so
they will be very useful for any scientific studies that require image data.

.. IncludeInSASEnd

Data Product Elements
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.. DataProductElementsStart

:Header: object of type sys:genericHeader
:Data: object of type mer:merBksMosaic
:QualityFlags: object of type dqc:sqfDpdMerBksMosaic
:Parameters: object of type ppr:genericKeyValueParameters

.. DataProductElementsEnd


Detailed Description of the Data Product
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.. DetailedDescStart

This product is the result of applying the MER Background Subtraction 
:term:`Processing Element` to a MER mosaic.

The main elements inside this product are:

* **Instrument**: The instrument name (VIS, NIR, DECAM) and the
  telescope name (Euclid, NOAO, LSST).
* **Filter**: The filter name (e.g., VIS, NIR_Y, NIR_J, NIR_H, DECAM_g, 
  LSST_u).
* **WCS**: The mosaic astrometric parameters (e.g., CTYPE1, CRVAL2, CRPIX1,
  CD1_1)
* **ZeroPoint**: The photometric reference zero point in magnitude units.
* **ImgSpatialFootprint**: The mosaic spatial footprint.
* **Masks** (optional): Euclid bit masks present in the flag image data set.
* **TileIndex**: The MER tile index.
* **PatchIdList** (optional): The sky patch ids associated to the product.
* **ObservationIdList** (optional): List of unique IDs identifying the Euclid
  observations that were used to generate the product.
* **CalblockIdList** (optional): The calibration block ids associated to the
  product.
* **ProcessingMode**: The MER pipeline processing mode (e.g. WIDE, DEEP) used to
  generate the product.
* **DataStorage**: Element that links to a FITS file containing the mosaic 
  signal data set.
* **RmsStorage**: Element that links to a FITS file containing the mosaic rms
  data set.
* **FlagStorage**: Element that links to a FITS file containing the mosaic flag
  data set.
* **PsfModelStorage**: Element that links to a FITS file containing the mosaic
  PSF model.
* **FilterTransmissionStorage**: Element that links to a FITS file containing 
  the mosaic average filter transmission wavelength data set.
* **BrightStarMasksStorage** (optional): Element that links to a json file 
  containing the mosaic bright star spatial masks.
* **BackgroundStorage**: Element that links to a FITS file containing the
  subtracted background model.
* **QualityParams**: The mosaic image quality parameters.
* **BackgroundQualityParams**: The mosaic background quality parameters.

.. DetailedDescEnd