.. _VisNonLinearityModel:


Vis Non Linearity Model Product
-----------------------------
  
Data product name
=================
.. DataProductNameStart

DpdVisNonLinearityModel
   
.. DataProductNameEnd
   
Data product custodian
======================
.. DataProductCustodianStart
   

   
.. DataProductCustodianEnd
   
Name of the Schema file
=======================
.. 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/vis/euc-vis-NonLinearityModel.xsd" target="_blank">euc-vis-NonLinearityModel.xsd</a>

.. NameSchemaEnd

Data product elements
=====================
.. DataProductElementsStart

:Header: object of type sys:genericHeader
:Data: object of type vis:visFileContainerData
:QualityFlags: object of type dqc:sqfPlaceHolder
:Parameters: object of type ppr:genericKeyValueParameters

.. DataProductElementsEnd
   
Schema documentation tag
========================
.. SchemaDocTagStart
   
:emphasis:`Documentation for data product element DpdVisNonLinearityModel:`

Model produced by the Non Linearity Calibration pipeline.

:emphasis:`Documentation for data product element Header:`
    
The generic header of the product.
   
.. SchemaDocTagEnd
   
Processing Element(s) creating/using the data product
=====================================================
.. PECreatorStart

VIS - NonLinear Calibration 
   
.. PECreatorEnd
   
Processing function using the data product
==========================================
.. PFUsingStart

VIS -- Processfield correction.

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

Model produced by the Non Linearity Calibration pipeline.
JSON file produced for each qudrant defining a polynomial function which applies the non linearity correction.  The polynomial coefficients are stored in numpy.poly1d() convention, in decreasing powers, starting from the highest degree. 

Sample of the polynomial product:
 "1-1.E": [
    1.6737016148821795e-32,
    -2.27198105837953e-27,
    9.851909684187759e-23,
    -1.3871686911278604e-18,
    1.0000000000000022,
    -1.204531435924529e-11
  ],
  "1-1.F": [
    3.5022595319426857e-32,
    -2.2128359779516248e-27,
    2.2930667660708266e-23,
    -2.2696813232594336e-19,
    1.0000000000000138,
    -1.2587978278072705e-11
  ],
   
.. DetailedDescEnd