.. _NIRLargeFlat: [to complete] NIR Large Scale Flat (LargeFlat) ===================== Metadata ______________________ +------------------------------------------------+----------------------------------------------------------------------------------------------+ | Data product name | DpdNirLargeFlatFrame | +------------------------------------------------+----------------------------------------------------------------------------------------------+ | Data product custodian | NIR | +------------------------------------------------+----------------------------------------------------------------------------------------------+ | Name of the Schema file | .. raw:: html | | | | | | `euc-nir-LargeFlat.xsd `_ | +------------------------------------------------+----------------------------------------------------------------------------------------------+ | Processing Element(s) creating/using the data | The **LargeFlat** is created by the *NIR_SelfCalib_Pipeline* pipeline. This pipeline compare | | product | source fluxes extracted in | | | dedicated Self Calibration Field observations to derive large scale pixel flux variations | | | together with detector by detector | | | offset tracked by the :ref:`NIRRelPhotoDetCalibration` Data Product. | | | | | | The task responsible for the LargeFlat creation is **NIR_Compute** (under *NIR_SelfCalib* | | | project). | +------------------------------------------------+----------------------------------------------------------------------------------------------+ | Processing function using the data product | This is an internal NIR data product, and it is used only by the NIR PF. | | | | | | It is applied by the **NIR_Apply** task (under *NIR_SelfCalib* project) inside the | | | *NIR_ProcessField_Pipeline*. | +------------------------------------------------+----------------------------------------------------------------------------------------------+ Data Product structure description ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .. DataProductDescrStart The main elements inside the "Data" section are: * **Filter**: The filter name (e.g. NIR_Y, NIR_J, NIR_H) * **ValidityRange**: Calibration file validity period estimated * **DataStorage**: Element that links to a FITS file containing the LargeFlat FITS file * **QualityParams** (optional): List of Detector Data Quality Parameters * **Min**: Minimum image pixel value * **Max**: Maximum image pixel value * **Mean**: Average image level (mean of all image pixel values) * **Median**: Median image level (median of all image pixel values) * **StDev**: Sample standard deviation of the image pixel values * **MaskedPixelFraction**: The fraction of masked pixels .. DataProductDescrEnd FITS file description ~~~~~~~~~~~~~~~~~~~~~ .. FITSFileDescriptionStart The structure of the NIR LargeFlat is the same as the Science Image of the :ref:`NIRCalibratedFrame` with 16 x 3 layers, i.e. containing median large field correction, RMS, and Data Quality flags for each detector. Primary header **************** The primary header contains keywords to identify FITS data type.