.. _DESStackedFrame:

Stacked Frame Product
---------------------

Metadata
______________________

+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Data product name                              | `DpdExtDesStackedFrame <https://gitlab.euclid-sgs.uk/ST-DM/ST_DataModel/blob/9.0.2/ST_DM_Sch |
|                                                | ema/auxdir/ST_DM_Schema/dpd/ext/des/euc-test-ext-des-StackedFrame.xsd#L20-26>`__             |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Data product custodian                         | `OU-EXT <https://euclid.roe.ac.uk/projects/sgu/wiki>`_                                       |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Name of the Schema file                        | `euc-test-ext-des-StackedFrame.xsd <https://gitlab.euclid-sgs.uk/ST-DM/ST_DataModel/blob/9.0 |
|                                                | .2/ST_DM_Schema/auxdir/ST_DM_Schema/dpd/ext/des/euc-test-ext-des-StackedFrame.xsd>`__        |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Processing Element(s) creating/using the data  |                                                                                              |
| product                                        |                                                                                              |
+------------------------------------------------+----------------------------------------------------------------------------------------------+
| Processing function using the data product     | EXT-DES, MER                                                                                 |
+------------------------------------------------+----------------------------------------------------------------------------------------------+

Detailed description of the data product
========================================
.. DetailedDescStart

Also known as **coadd** in DES terminology. This product is the result of applying the
DES *coadd* pipeline to a set of DES :ref:`DESCalibratedFrame`\s (single epoch images).

The main elements inside this product are:

* **Instrument**: The instrument name (DECam) and telescope name (NOAO).
* **Filter**: The DECam filter name (DECAM_g, DECAM_r, DECAM_i, DECAM_z or DECAM_Y).
* **WCS**: The image astrometric parameters with linear (e.g., CTYPE1, CRVAL2, CRPIX1,
  CD1_1) and, optionally, non linear terms (PV1_0, PV2_0, ...).
* **ZeroPoint**: The photometric reference zero point in magnitude units.
* **ImgSpatialFootprint** (optional): The spatial footprint of the image either in a
  serie of vertex or a bounding box.
* **Masks** (optional): Euclid bit masks present in the flag image dataset.
* **Saturate**: Global saturation threshold valid for amplifiers A and B.
* **Scamp**: Information about the Scamp processing.
* **DataStorage**: Element that links to a FITS file containing the coadd image, flag
  and weight datasets.
* **PsfModelStorage**: Element that links to a FITS file containing the coadd PSF model.
* **RunInformation**: Information about the processing run (Project and RunNumber).
* **ProcessingSteps** (optional): Information about the processing steps associated
  with the *coadd* process.

.. include:: ../../fit/fit.ext.des.coadd.rst

.. DetailedDescEnd