fix incorrect leapsec math for AQUA CUC

edosl0util/headers.py

@@ -110,7 +110,7 @@ class AquaCucTimecode(Timecode):
     def day_segmented_timecode(self):
         days = self.seconds / 86400
         leap_ms = self.leap_seconds * 1e3
-        millis = 86400 * (days - int(days)) * 1e3 + leap_ms
+        millis = 86400 * (days - int(days)) * 1e3 - leap_ms
         micros = self.SUB_SECOND_UNITS * self.sub_seconds
         return int(days), int(millis), int(micros)
 

tests/unit/test_headers.py

@@ -11,7 +11,7 @@ class TestAquaCUCTimecode:
             pytest.param(
                 # GBAD secondary header data
                 bytes([0xAE, 0x25, 0x77, 0x1E, 0xCA, 0x8E, 0x80, 0x20]),
-                datetime(2021, 4, 30, 20, 44, 35, 497560),
+                datetime(2021, 4, 30, 20, 43, 21, 497560),
                 id="gbad",
             )
         ],