.. _NIRintro:

Introduction
============

The NIR :term:`Processing Function` is in charge of reducing all the NISP imaging data of the Euclid wide survey,
analysing the NISP data of the Euclid deep survey, and pre-reducing the NISP spectral data in common with the SIR
:term:`Processing Function`.

The goal of this section is to describe NIR PF Data Products to allow other PFs to designe their interfaces with NIR.
A description of the NIR PF can be found on the NIR Software Description Document (SDD, EUCL-OTS-DDD-8-004), which is
in turn based on the NIR Requirements Specifications Document (RSD, EUCL-OAR-RS-8-001).

:numref:`NIR_workflow` shows a logical model for the NIR PF workflow.

.. _NIR_workflow:
.. figure:: ./figures/NIR_workflow.pdf

    : NIR PF logical model

This is composed by:

* :ref:`NIR_preproc`
* :ref:`NIR_dithercal`
* :ref:`NIR_stacking`.


However, only a fraction of all :term:`Processing Element`  has been implemented for the :abbr:`SC3 (Scientific Challenge 3)`.
As a result, some of the Data Products do not have detailed descriptions nor corresponding Data Model entries. In the
following, we will describe only those Data Products used for the :abbr:`SC3 (Scientific Challenge 3)`:

* NIR Scientific Data Products
    * :ref:`NIRCalibratedFrame`
    * :ref:`NIRStackedFrame`
    * :ref:`NIRObjCatalog`

* NIR Calibration Data Products
    * :ref:`NIRMasterDark`
    * :ref:`NIRMasterFlat`
    * :ref:`NIRSuperFlat`
    * :ref:`NIRRelPhotoDetCalibration`
    * :ref:`NIRRelPhotoExpCalibration`
    * :ref:`NIRRelPhotoFieldCalibration`
    * :ref:`NIRAbsPhotoCalibration`

* NIR PF Settings
    * :ref:`NIRConfigurationSet`

.. _NIR_preproc:
.. figure:: ./figures/NIR_preprocessing.pdf

    NIR PF Common pre-processing

.. _NIR_dithercal:
.. figure:: ./figures/NIR_dithercal.pdf

    NIR PF dither calibration

.. _NIR_stacking:
.. figure:: ./figures/NIR_stacking.pdf

    NIR PF stacking and catalogue extraction