adding some comments

LSSTDESC · Jul 30, 2018 · ca6902c · ca6902c
1 parent ef21da7
commit ca6902c
Showing 1 changed file with 10 additions and 2 deletions.
diff --git a/python/desc/imsim/flats.py b/python/desc/imsim/flats.py
@@ -9,16 +9,24 @@
 
 def make_flats(obs_md, phosim_commands=None, counts_per_iter=4e3, counts_total=80e3, treering_amplitude = 0.26, nflats=1, nborder=2, treering_period = 47., treering_center = galsim.PositionD(0,0), seed = 31415):
 
+    # get photometric parameters
     if phosim_commands==None:
         phot_params = photometricParameters(phosim_commands)
     else:
         phot_params = PhotometricParameters(bandpass='r', darkcurrent=0, exptime=30., gain=1, nexp=1, readnoise=0)
 
-
+    # create an lsst camera object
     camera = get_obs_lsstSim_camera()
+
     interpreter = GSInterface.GalSimInterpreter(detectors=list(camera))
+
+    # create lsst cameraWrapper
     cameraWrapper = GSInterface.LSSTCameraWrapper()
+
+    # create a list of detector objects
     detectors = [GSInterface.make_galsim_detector(cameraWrapper, det.getName(), phot_params, obs_md) for det in list(camera) if str(det.getType())=='DetectorType.SCIENCE']
+
+    # use detector objects to make blank images with correct lsst pixel geometry and wcs
     blank_imgs = [interpreter.blankImage(det) for det in detectors] 
 
 
@@ -97,4 +105,4 @@ def make_flats(obs_md, phosim_commands=None, counts_per_iter=4e3, counts_total=8
             image.setOrigin(1,1)
             # print('bounds => ',image.bounds)
 
-            image.write('flat{:02d}_{:02d}.fits'.format(m,n))
+            image.write('flat{:02d}_{:02d}.fits'.format(m,n))