Index: ammosreader/PDW.py
===================================================================
--- ammosreader/PDW.py	(revision d34008da9ab44e1e2ee97a71488b59cdf8ae1979)
+++ ammosreader/PDW.py	(revision 3c331d1c540f6c7e8dd6052079ac89f363ba82c6)
@@ -29,5 +29,7 @@
         parts = struct.unpack('<Q4s4s4s4s4s4s', byte_string)
         nanoseconds = (parts[0])
-        if (np.datetime64('now', 'ns').astype(int) >= nanoseconds):
+        print("Nanoseconds", nanoseconds)
+        unix_time = np.datetime64('now', 'ns').astype(int)
+        if unix_time > nanoseconds):
             raise OverflowError("Timestamp invalid")
         time_of_arrival = np.datetime64(nanoseconds, 'ns')