diff --git a/py/legacyanalysis/get-brick-files.py b/py/legacyanalysis/get-brick-files.py
new file mode 100644
index 000000000..4a7272271
--- /dev/null
+++ b/py/legacyanalysis/get-brick-files.py
@@ -0,0 +1,68 @@
+#!/usr/bin/env python
+
+"""List the images and calibration files one would need to pull from NERSC to
+process a single brick.  Used by decals_sim.py.
+
+"""
+from __future__ import division, print_function
+
+import os
+import sys
+import argparse
+
+from legacypipe.common import LegacySurveyData, wcs_for_brick, ccds_touching_wcs
+
+import numpy as np
+import pdb
+
+def main():
+
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-b', '--brickname', type=str, default='2428p117', help='Brick of interest')
+    args = parser.parse_args()
+
+    survey = LegacySurveyData()
+    brickinfo = survey.get_brick_by_name(args.brickname)
+    brickwcs = wcs_for_brick(brickinfo)
+    ccdinfo = survey.ccds_touching_wcs(brickwcs)
+    nccd = len(ccdinfo)
+
+    # Construct image file names.
+    # Construct calibration file names.
+    expnum = ccdinfo.expnum
+    ccdname = ccdinfo.ccdname
+
+    psffiles = list()
+    skyfiles = list()
+    imagefiles = list()
+    for ii in range(nccd):
+        exp = '{0:08d}'.format(expnum[ii])
+        rootfile = os.path.join(exp[:5], exp, 'decam-'+exp+'-'+ccdname[ii]+'.fits')
+        #pdb.set_trace()
+        psffiles.append(os.path.join('calib', 'decam', 'psfex', rootfile))
+        skyfiles.append(os.path.join('calib', 'decam', 'splinesky', rootfile))
+        imagefiles.append(os.path.join('images', str(np.core.defchararray.strip(ccdinfo.image_filename[ii]))))
+
+    print(np.array(imagefiles))
+    print(np.array(psffiles))
+    print(np.array(skyfiles))
+
+    brickfiles = open('/tmp/brickfiles.txt', 'w')
+    for ii in range(nccd):
+        brickfiles.write(psffiles[ii]+'\n')
+    for ii in range(nccd):
+        brickfiles.write(skyfiles[ii]+'\n')
+    for ii in range(nccd):
+        brickfiles.write(imagefiles[ii]+'\n')
+    for ii in range(nccd):
+        brickfiles.write(imagefiles[ii].replace('ooi', 'oow')+'\n')
+    for ii in range(nccd):
+        brickfiles.write(imagefiles[ii].replace('ooi', 'ood')+'\n')
+    brickfiles.close()
+
+    cmd = "rsync -avP --files-from='/tmp/brickfiles.txt' cori:/global/cscratch1/sd/desiproc/dr3/ /global/work/decam/versions/work/"
+    print('You should run the following command:')
+    print('  {}'.format(cmd))
+    
+if __name__ == "__main__":
+    main()