diff --git a/demo/04_ssins.py b/demo/04_ssins.py
index 9e136f3..8cabd0a 100755
--- a/demo/04_ssins.py
+++ b/demo/04_ssins.py
@@ -1,4 +1,8 @@
 #!/usr/bin/env python
+
+# identify RFI using ssins
+# details: https://github.com/mwilensky768/SSINS
+
 from pyuvdata import UVData
 from SSINS import SS, INS, MF
 import os
@@ -28,6 +32,24 @@ def get_parser():
         action="store_true",
         help="skip flagging of edge channels, quack time",
     )
+    group_uvd_read.add_argument(
+        "--remove-coarse-band",
+        default=False,
+        action="store_true",
+        help="Correct coarse PFB passband (resolution must be > 10kHz)",
+    )
+    group_uvd_read.add_argument(
+        "--correct-van-vleck",
+        default=False,
+        action="store_true",
+        help="Correct van vleck quantization artifacts in legacy correlator. slow!",
+    )
+    group_uvd_read.add_argument(
+        "--include-flagged-ants",
+        default=False,
+        action="store_true",
+        help="Include flagged antenna when reading raw files",
+    )
 
     # arguments for UVData.select()
     group_uvd_sel = parser.add_argument_group("UVData.select")
@@ -322,9 +344,9 @@ def main():
         args.files,
         read_data=True,
         diff=(not args.no_diff),  # difference timesteps
-        remove_coarse_band=False,  # does not work with low freq res
-        correct_van_vleck=False,  # slow
-        remove_flagged_ants=True,  # remove flagged antennas
+        remove_coarse_band=args.remove_coarse_band,  # does not work with low freq res
+        correct_van_vleck=args.correct_van_vleck,  # slow
+        remove_flagged_ants=(not args.include_flagged_ants),  # remove flagged antennas
         flag_init=(not args.no_flag_init),
     )
 
diff --git a/demo/04_ssins.sh b/demo/04_ssins.sh
index 1d5938e..065273c 100755
--- a/demo/04_ssins.sh
+++ b/demo/04_ssins.sh
@@ -1,6 +1,5 @@
 #!/bin/bash
-# identify RFI using ssins
-# details: https://github.com/mwilensky768/SSINS
+# wrapper for 04_ssins.py
 
 # ### #
 # ENV #