diff --git a/modules/util/viirs_l1b_l2.py b/modules/util/viirs_l1b_l2.py
index 011378464441b8b8117423b2f1dc1b71f0d2014d..d509392355e0e4fc9c0084b723569be98e310e1f 100644
--- a/modules/util/viirs_l1b_l2.py
+++ b/modules/util/viirs_l1b_l2.py
@@ -244,9 +244,9 @@ def scan_for_location(txt_file, lon_range=[111.0, 130.0], lat_range=[14.0, 32.0]
             fpath = fpath.strip()
             h5f = h5py.File(fpath, 'r')
             try:
-                lon_s = get_grid_values_all(h5f, 'longitude')
-                lat_s = get_grid_values_all(h5f, 'latitude')
-                c_lon, c_lat = lon_s[1624, 1600], lat_s[1624, 1600]
+                lon_s = get_grid_values_all(h5f, 'longitude', stride=4)
+                lat_s = get_grid_values_all(h5f, 'latitude', stride=4)
+                c_lon, c_lat = lon_s[406, 400], lat_s[406, 400]
                 if (lon_range[0] < c_lon < lon_range[1]) and (lat_range[0] < c_lat < lat_range[1]):
                     print(fpath)