Index: ammosreader/PDW.py
===================================================================
--- ammosreader/PDW.py	(revision 14d7f7d3631590c2320a6e2e87cd14d4db6180c5)
+++ ammosreader/PDW.py	(revision 25c80a7bf125fd18905db649858395cde8aac23f)
@@ -32,5 +32,5 @@
         unix_time = np.datetime64('now', 'ns').astype(int)
         print("Unix time", unix_time)
-        if unix_time > nanoseconds:
+        if nanoseconds >= unix_time:
             raise OverflowError("Timestamp invalid")
         time_of_arrival = np.datetime64(nanoseconds, 'ns')