diff --git a/modules/util/acspo_validate.py b/modules/util/acspo_validate.py
index 48bb24c5b72f0fd921f8d5436258f0c4e41d7603..3b0a3ae8953503c47e5d7453d33451c0f9053b1f 100644
--- a/modules/util/acspo_validate.py
+++ b/modules/util/acspo_validate.py
@@ -12,22 +12,48 @@ def acspo_validate(oper_file, cspp_file, rel_tol=0.001, outfile_nc=None):
 
     lon_cspp = get_grid_values_all(h5f_cspp, 'lon')
     lat_cspp = get_grid_values_all(h5f_cspp, 'lat')
+    if np.any(np.isnan(lat_cspp)) or np.any(np.isnan(lon_cspp)):
+        print('Invalid lat')
+    if np.min(lat_cspp) < -90 or np.max(lat_cspp) > 90:
+        print('Invalid lat')
+    if np.min(lon_cspp) < -180 or np.max(lon_cspp) > 180:
+        print('Invalid lon')
+
+    # ----* Investigate: CSPP and OPER time values don't seem to ever match *-------------------
+    # dtime_cspp = get_grid_values_all(h5f_cspp, 'sst_dtime')[0, ]
+    # ref_time_cspp = get_grid_values_all(h5f_cspp, 'time')[0]
     print('cspp shape: ', lat_cspp.shape)
     c_idx = lat_cspp.shape[1] // 2
+
     cntr_lon_cspp = lon_cspp[:, c_idx]
     cntr_lat_cspp = lat_cspp[:, c_idx]
-
+    # cntr_dtime_cspp = dtime_cspp[::16, c_idx]
     sst_cspp = get_grid_values_all(h5f_cspp, 'sea_surface_temperature')[0, ]
     l2p_flags_cspp = get_grid_values_all(h5f_cspp, 'l2p_flags')[0, ]
 
     lon_oper = get_grid_values_all(h5f_oper, 'lon')
     lat_oper = get_grid_values_all(h5f_oper, 'lat')
+    if np.any(np.isnan(lat_cspp)) or np.any(np.isnan(lon_cspp)):
+        print('Invalid lat')
+    if np.min(lat_cspp) < -90 or np.max(lat_cspp) > 90:
+        print('Invalid lat')
+    if np.min(lon_cspp) < -180 or np.max(lon_cspp) > 180:
+        print('Invalid lon')
+
+    # --* See note above on issue with time *-------------------------------------
+    # dtime_oper = get_grid_values_all(h5f_oper, 'sst_dtime')[0, ]
+    # ref_time_oper = get_grid_values_all(h5f_oper, 'time')[0]
+
     cntr_lon_oper = lon_oper[:, c_idx]
     cntr_lat_oper = lat_oper[:, c_idx]
+    # cntr_dtime_oper = dtime_oper[::16, c_idx]
     print('oper shape: ', lat_oper.shape)
     sst_oper = get_grid_values_all(h5f_oper, 'sea_surface_temperature')[0, ]
     l2p_flags_oper = get_grid_values_all(h5f_oper, 'l2p_flags')[0, ]
 
+    # cntr_time_cspp = cntr_dtime_cspp + ref_time_cspp
+    # cntr_time_oper = cntr_dtime_oper + ref_time_oper
+
     # generate a ndarray of boolean, True: clear or probably clear
     cspp_clear = (l2p_flags_cspp & (1 << 15)) == 0
     oper_clear = (l2p_flags_oper & (1 << 15)) == 0