Shear PSF Level 1 Calibration Parameters¶
Metadata¶
Data product name |
DpdShePsfLevel1CalibrationParameters |
Data product custodian |
SHE |
Name of the Schema file |
|
Processing Element(s) creating/using the data product |
Creators:
Consumers:
|
Processing function using the data product |
SHE |
Proposed for inclusion in EAS/SAS |
This product is proposed for inclusion in the SAS: no |
Detailed description of the data product¶
PSF Level1 Calibration parameters, giving the current state of the telescope after fitting to defocused and infocus data at a particular roll angle.
Will include a set of Zernike amplitude/telescope optical layout parameters which describe wavefront propagation through the system, expected to consist of < 100 params (floats).
Detector state format TBD, will include parameters describing the brighter-fatter effect, chip-to-chip variation.
Will contain parameters describing the FOV-dependent mapping between the telescope model (optical layout) and zernike amplitudes, as a list of coefficients to a polynomial fit. TBD.
Will include catalogue of star identifier with \(\chi^2\) value per star, to satisfy R-SHE-PRD-F-100, as well as sub-pixel stellar position on the detector (2 floats), for the stellar images used in the calibration
CTI residual parameterisation TBD
Output File¶
The FITS output file will contain the following information:
HDU List
Primary Header¶
The primary head will contain the following additional information:
HDU PRIMARY: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
DATE-FIT |
string |
|
FITS_VER |
string = 9.0 |
||
FITS_DEF |
string = she.psfLevel1CalibrationParameters |
||
NPIECES |
integer |
||
Telescope Mode parameters¶
These are parameters that describe mirror movements, based on a ray tracing model.
HDU SheTelescopeModeParams: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.psfLevel1CalibrationParameters.SheTelescopeModeParams |
||
HDU SheTelescopeModeParams: 19 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
SHE_PSF_CAL_M1TRAD |
NA |
FITS E |
|
SHE_PSF_CAL_M2TRAD |
NA |
FITS E |
||
SHE_PSF_CAL_FOM1TRFN |
NA |
FITS E |
||
SHE_PSF_CAL_FOM2TRFN |
NA |
FITS E |
||
SHE_PSF_CAL_M3TRAD |
NA |
FITS E |
||
SHE_PSF_CAL_DIC_TRFN |
NA |
FITS E |
||
SHE_PSF_CAL_M1TCON |
NA |
FITS E |
||
SHE_PSF_CAL_M2TCON |
NA |
FITS E |
||
SHE_PSF_CAL_M3TCON |
NA |
FITS E |
||
SHE_PSF_CAL_M2TZ |
NA |
FITS E |
||
SHE_PSF_CAL_M2TX |
NA |
FITS E |
||
SHE_PSF_CAL_M2TY |
NA |
FITS E |
||
SHE_PSF_CAL_M2RX |
NA |
FITS E |
||
SHE_PSF_CAL_M2RY |
NA |
FITS E |
||
SHE_PSF_CAL_M3TZ |
NA |
FITS E |
||
SHE_PSF_CAL_M3TX |
NA |
FITS E |
||
SHE_PSF_CAL_M3TY |
NA |
FITS E |
||
SHE_PSF_CAL_M3RX |
NA |
FITS E |
||
SHE_PSF_CAL_M3RY |
NA |
FITS E |
||
Zernike Mode Parameters¶
The Zernike mode parameters describe the wavefront errors as a set of orthoganol functions that change in radial and azimuthal degree. A subset of all possible Zernike modes are used to describe the wavefront error. 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. A combination of defocused and infocus data helps to break the degeneracy between some of the different modes.
HDU SheZernikeModeParams: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.psfLevel1CalibrationParameters.SheZernikeModeParams |
||
NZERNMDE |
integer |
||
NPLOYCFF |
integer |
||
HDU SheZernikeModeParams: 4 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
PIECEWISE_ID |
NA |
FITS I |
|
FOV_RANGE_X |
pixel |
FITS PE(2) |
||
FOV_RANGE_Y |
pixel |
FITS PE(2) |
||
ZERNIKE_POLY_AMP_WFE |
NA |
FITS PE(500) |
||
Detector Model Parameters¶
TBD. These are effects due to the detector electronics, such as the brighter-fatter effect.
HDU SheDetectorModelParams: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.she.psfLevel1CalibrationParameters.SheDetectorModelParams |
||
HDU SheDetectorModelParams: 5 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
PIECEWISE_ID |
NA |
FITS I |
|
DET_IDX |
NA |
FITS I |
||
DET_IX |
NA |
FITS I |
||
DET_IY |
NA |
FITS I |
||
GAUSSIAN_KERNAL_COEFF |
NA |
FITS PE(36) |
||
Spectral Throughput Parameters¶
A polynomial model describing the derived spectral throughput.
HDU ShePsfCalSpecThrough: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.she.psfLevel1CalibrationParameters.ShePsfCalSpecThrough |
||
NPLYCFF |
integer |
||
HDU ShePsfCalSpecThrough: 1 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
SPEC_THROUGHPUT_POLY_COEFF |
NA |
FITS PE(10) |
|
Fisher Matrix Parameters¶
The Fisher matrix parameters calculated from the maximum likelihood fit of the model to the stars in these field.
HDU ShePsfCalFisherMatrix: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.she.psfLevel1CalibrationParameters.ShePsfCalFisherMatrix |
||
HDU ShePsfCalFisherMatrix: 3 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
PIECEWISE_ID |
NA |
FITS I |
|
FISHER_MATRIX_ZNK_WFE |
NA |
FITS PE(2500) |
||
FISHER_MATRIX_DET |
NA |
FITS PE(25) |
||
Star Residual Parameters¶
Details of the fit for each star used: how well the PSF models each individual star.
HDU ShePsfCalStarResiduals: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.she.psfLevel1CalibrationParameters.ShePsfCalStarResiduals |
||
HDU ShePsfCalStarResiduals: 16 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
OBJECT_ID |
NA |
FITS K |
|
EXPOSURE_PRODUCT_ID |
NA |
FITS K |
||
PIECEWISE_ID |
NA |
FITS I |
||
DET_IDX |
NA |
FITS I |
||
X_POS |
pixel |
FITS E |
||
Y_POS |
pixel |
FITS E |
||
FOV_X |
deg |
FITS D |
||
FOV_Y |
deg |
FITS D |
||
STAR_WEIGHT |
NA |
FITS E |
||
REGION_SIZE |
pixel |
FITS I |
||
RESIDUAL_RMS |
NA |
FITS E |
||
STAR_PSF_CHISQ |
NA |
FITS E |
||
STAR_NDOF |
NA |
FITS I |
||
MOMENTS_OF_FIT |
NA |
FITS PE(2) |
||
MOMENTS_OF_DATA |
NA |
FITS PE(2) |
||
MOMENTS_OF_RESIDUALS |
NA |
FITS PE(2) |
||
Toolkit Input Parameters¶
The parameters used in the configuration of the SHE_PSF_Toolkit software.
HDU SheToolkitInputParams: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.she.psflevel1CalibrationParameters.SheToolkitInputParams |
||
HDU SheToolkitInputParams: 2 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
TOOLKIT_PARAM_NAME |
NA |
FITS 40A |
|
TOOLKIT_VALUE |
NA |
FITS 60A |
||
Diagnositic Parameters¶
The chi-squared and number of degrees of freedom of the fit.
HDU ShePsfDiagnostics: header |
|||
|---|---|---|---|
Name |
Description |
Value |
|
Keywords |
FITS_VER |
string = 9.0 |
|
FITS_DEF |
string = she.psfLevel1CalibrationParameters.ShePsfDiagnostics |
||
HDU ShePsfDiagnostics: 2 columns table |
||||
|---|---|---|---|---|
Name |
Description |
Unit |
Format |
|
Columns |
CHI_SQUARED_OF_FIT |
NA |
FITS E |
|
NUMBER_DOF_OF_FIT |
NA |
FITS I |
||