FgcmMakeLutTask¶
FgcmMakeLutTask computes a look-up table tracking atmosphere and instrumental variations for use in the fgcmcal fits. The intention is that this is run once for a given observatory/instrument and should only be updated when instrumental parameters change (e.g., updated filter and ccd throughput curves), or in the extremely rare case if an observatory is relocated to a different elevation or latitude.
This is the first task in a typical fgcmcal processing chain. The second is FgcmBuildStarsTask, the third is FgcmFitCycleTask, and the fourth is FgcmOutputProductsTask.
FgcmMakeLutTask is available as a command-line task, fgcmMakeLut.py.
Processing summary¶
FgcmMakeLutTask uses an input atmosphere table (preferable) or a list of atmosphere parameters, combined with the instrumental throughput as a function of position, to compute a look-up table used in the fgcmcal fits.
fgcmMakeLut.py command-line interface¶
Note that no --id arguments are used by fgcmMakeLut.py.
fgcmMakeLut.py REPOPATH [@file [@file2 ...]] [--output OUTPUTREPO | --rerun RERUN] [other options]
Key arguments:
REPOPATH- The input Butler repository’s URI or file path.
See also
See Command-line task argument reference for details and additional options.
Python API summary¶
from lsst.fgcmcal.fgcmMakeLut import FgcmMakeLutTask
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class
FgcmMakeLutTask Make Look-Up Table for FGCM
...
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attribute
config Access configuration fields and retargetable subtasks.
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method
runDataRef Make a Look-Up Table for FGCM
...
See also
See the FgcmMakeLutTask API reference for complete details.
Butler datasets¶
When run as the fgcmMakeLut.py command-line task, or directly through the runDataRef method, FgcmMakeLutTask obtains datasets from the input Butler data repository and persists outputs to the output Butler data repository.
Note that configurations for FgcmMakeLutTask, and its subtasks, affect what datasets are persisted and what their content is.
Input datasets¶
camera- Camera geometry and detector object
transmission_optics- Optics transmission curve for the instrument
transmission_filter- Filter transmission curve (as a function of position) for the instrument
Output datasets¶
fgcmLookUpTable- FGCM atmosphere and instrument look-up table
Retargetable subtasks¶
No subtasks.
Configuration fields¶
atmosphereTableName¶
parameters¶
- Data type
lsst.fgcmcal.fgcmMakeLut.FgcmMakeLutParametersConfig- Field type
ConfigField