diff --git a/modules/util/acspo_validate.py b/modules/util/acspo_validate.py
index b986f1178158e69d31f135c104ad3b1224886a41..17c59a68e520db7c13c21df3c4716024490ed70b 100644
--- a/modules/util/acspo_validate.py
+++ b/modules/util/acspo_validate.py
@@ -63,7 +63,11 @@ def acspo_validate(oper_file, cspp_file):
     sst_cspp = sst_cspp[start_idx_cspp:stop_idx_cspp, :].flatten()
     sst_oper = sst_oper[start_idx_oper:stop_idx_oper, :].flatten()
 
-    print(np.sum(np.isclose(sst_cspp, sst_oper, rtol=0.01)))
+    both_valid = np.invert(np.isnan(sst_cspp)) & np.invert(np.isnan(sst_oper))
+    print('number of valid sst in both: ', np.sum(both_valid))
+
+    print(np.sum(np.isclose(sst_cspp[both_valid], sst_oper[both_valid], rtol=0.001)))
+    # print(np.histogram((sst_cspp[both_valid] - sst_oper[both_valid]), bins=10))