Installation

source /sps/lsst/software/lsst_sims/sims_2_6_0/loadLSST.bash
setup lsst_sims
git clone https://github.com/LSSTDESC/imSim
cd imSim
git checkout 61e2eab4cd29dfaf25de9f16b9d9de0e1895b320
eups declare -r . imsim -t current
scons
setup imsim
export PATH=$PWD/bin:$PATH
cd ..
imsim.py --help

Remarque:

• la version du package git imSim doit être compatible avec l'environnement de simulation installé au CCIN2P3. Il n'est pas garantie que la branche master actuelle fonctionne avec la version 'sims_2_6_0', ce qui explique l'utilisation d'un numéro de commit 61e2ea... avec lequel la compatibilité est assurée.

imSim help

$imsim.py --help
usage: imsim.py [-h] [-n NUMROWS] [--outdir OUTDIR] [--sensor SENSOR]
                [--config_file CONFIG_FILE]
                [--log_level {DEBUG,INFO,WARN,ERROR,CRITICAL}]
                [--psf {DoubleGaussian,Kolmogorov}]
                [--checkpoint_file CHECKPOINT_FILE]
                [--nobj_checkpoint NOBJ_CHECKPOINT] [--seed SEED]
                file

positional arguments:
  file                  The instance catalog

optional arguments:
  -h, --help            show this help message and exit
  -n NUMROWS, --numrows NUMROWS
                        Read the first numrows of the file.
  --outdir OUTDIR       Output directory for eimage file
  --sensor SENSOR       Sensor to simulate, e.g., "R:2,2 S:1,1".If None, then
                        simulate all sensors with sources on them
  --config_file CONFIG_FILE
                        Config file. If None, the default config will be used.
  --log_level {DEBUG,INFO,WARN,ERROR,CRITICAL}
                        Logging level. Default: "INFO"
  --psf {DoubleGaussian,Kolmogorov}
                        PSF model to use; either the double Gaussian from
                        LSE=40 (equation 30), or the Kolmogorov convolved with
                        a Gaussian proposed by David Kirkby at the 23 March
                        2017 SSims telecon
  --checkpoint_file CHECKPOINT_FILE
                        Checkpoint file name.
  --nobj_checkpoint NOBJ_CHECKPOINT
                        # objects to process between checkpoints
  --seed SEED           integer used to seed random number generator

Test basique

$imsim.py --outdir imsim_out  imSim/tests/shear_test_instcat.txt
$ll imsim_out
total 63648
-rw-rw----+ 1 colley lsst 65162880 Aug  3 13:19 lsst_e_161899_R22_S11_r.fits