diff --git a/modules/amv/caliop_clavrx_amv.py b/modules/amv/caliop_clavrx_amv.py
index 9cc84feb3308ac56c16de7a831637493a732bc02..06f6d6d7e4042a2f8f4e4d41cc831b36da42fd67 100644
--- a/modules/amv/caliop_clavrx_amv.py
+++ b/modules/amv/caliop_clavrx_amv.py
@@ -313,7 +313,7 @@ def run_caliop_clavrx_amv_match(output_path, path_to_caliop_clavrx, path_to_amvs
     amv_params = amv_ds.get_parameters()
     amv_filenames = amv_ds.flist
 
-    gfs_ds = get_datasource(path_to_gfs, 'GFS')
+    gfs_ds = get_datasource(path_to_gfs, 'GFS', window=180)
 
     for f in caliop_clavrx_ds.flist:
         match_dict = match_calipso_clavrx_to_amvs(caliop_clavrx_ds, f, amv_ds, caliop_clavrx_params, gfs_ds)