Shear PSF Field Parameters¶

$SetSchemaPath she/euc-she-PsfFieldParameters.xsd

Data product name¶

$PrintDataProductName

Data product custodian¶

$PrintDataProductCustodian

Name of the Schema file¶

$PrintSchemaFilename

Last Edited for DPDD Version¶

1.1

Data product elements¶

$PrintDataProductElements

Processing Element(s) creating/using the data product¶

Creators:

SHE_PSFToolkit_Fitting_FitPSFs

Consumers:

SHE_PSFToolkit_ModelPSFs

Processing function using the data product¶

SHE

Detailed description of the data product¶

PSF field parameters product, giving the telescope state for a given exposure. Parameterisation for this data model largely consists of a subset of those included in the she_psfcalibration data product, as it is limited to only those parameters which are expected to vary on an exposure-to-exposure time scale (or on a time scale less than calibration observation cadence). Finalised Format TBD.

The FITS output file will contain the following information:

Output File¶

The FITS output file will contain the following information:

HDU List

Primary Header¶

The primary head will contain the following additional information:

$PrintPrimaryHeader fit/euc-she.xml she.psfFieldParameters

Telescope Mode Parameters¶

These are parameters that describe mirror movements, based on a ray tracing model.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters SheTelescopeModeParams

Zernike Basis Coefficients¶

These coefficients are the weights for the she.psfLevel2CalibrationParameters.SheBasisZernikeModeParams to find the best fit Zernike parameters from the array of Zernike modes at different roll angle and solar-aspect angle using the roll angle and solar-aspect angle of the field observation.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters SheZernikeBasisCoeffs

Zernike Mode Parameters¶

The Zernike mode parameters describe the wavefront errors as a set of orthoganol functions that change in radial and azimuthal degree. For field fitting, many parameters are derived from the solar-aspect and roll angle using the Level 2 calibration product, but others that are strongly linked to focus are fitted for. The coefficients are a combination of the modes that are related to different optical effects and polynomial functions that describe the variation across the field-of-view.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters SheZernikeModeParams

Fisher Matrix Parameters¶

The Fisher matrix parameters calculated from the maximum likelihood fit of the model to the stars in these field.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters ShePsfFieldFisherMatrix

Star Residual Parameters¶

Details of the fit for each star used: how well the PSF models each individual star.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters ShePsfFieldStarResiduals

Toolkit Input Parameters¶

The parameters used in the configuration of the SHE_PSF_Toolkit software.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters SheToolkitInputParams

Diagnostic Parameters¶

The chi-squared and number of degrees of freedom of the fit.

$PrintHDUTableContents fit/euc-she.xml she.psfFieldParameters ShePsfDiagnostics