This repository contains code for PSF measurement in fiber-fed spectrograph for DESI.
This package is intended to be used with the specter extraction code. The installation procedure is described in the INSTALL file, as well as below. The code uses pybind11 (2.2.0)
git clone --single-branch --branch io_refactor https://github.com/desihub/specex
cd specex
python setup.py install --prefix .
Access to specex in python is through a wrapper specex.specex.run_specex:
from specex.specex import run_specex
com = ['desi_psf_fit']
com.extend(['-a',
'/global/cfs/cdirs/desi/spectro/redux/blanc/preproc/20201216/00068217/preproc-b1-00068217.fits'])
com.extend(['--in-psf', '/global/cfs/cdirs/desi/spectro/redux/blanc/exposures/20201216/00068217/shifted-input-psf-b1-00068217.fits'])
com.extend(['--out-psf', './fit-psf-b1-00068217-00.fits'])
com.extend(['--first-bundle', '0'])
com.extend(['--last-bundle', '0'])
com.extend(['--first-fiber', '0'])
com.extend(['--last-fiber', '24'])
com.extend(['--legendre-deg-wave', '1'])
retval = run_specex(com)
This should produce a file fit-psf-b1-00068217-00.fits in the same directory.