From b1c5e4c54295d504a6753fd93a919f591ebd26fb Mon Sep 17 00:00:00 2001
From: GMV - Emmanuel Roche <eroche@gmv.com>
Date: Tue, 4 Feb 2025 13:10:08 +0100
Subject: [PATCH] Fixing unit test on onboard_utc

---
 satpy/readers/iasi_ng_l2_nc.py                |  2 +-
 .../tests/reader_tests/test_iasi_ng_l2_nc.py  | 20 +++++++++----------
 2 files changed, 11 insertions(+), 11 deletions(-)

diff --git a/satpy/readers/iasi_ng_l2_nc.py b/satpy/readers/iasi_ng_l2_nc.py
index 5d6184c2bf..4facf05890 100644
--- a/satpy/readers/iasi_ng_l2_nc.py
+++ b/satpy/readers/iasi_ng_l2_nc.py
@@ -349,7 +349,7 @@ def convert_to_datetime(self, data_array, ds_info):
         # Note: converting the time values to ns precision to avoid warnings
         # from panda+numpy:
         data_array = xr.DataArray(
-            data=pd.to_datetime(epoch) + (data_array * 1e9).astype("timedelta64[ns]"),
+            data=pd.to_datetime(epoch) + data_array.astype("timedelta64[ns]") * 1e9,
             dims=data_array.dims,
             attrs=data_array.attrs,
         )
diff --git a/satpy/tests/reader_tests/test_iasi_ng_l2_nc.py b/satpy/tests/reader_tests/test_iasi_ng_l2_nc.py
index e7fdb2a65e..23d805f47b 100644
--- a/satpy/tests/reader_tests/test_iasi_ng_l2_nc.py
+++ b/satpy/tests/reader_tests/test_iasi_ng_l2_nc.py
@@ -327,20 +327,20 @@ def test_latlon_datasets(self, twv_scene):
         assert np.nanmin(lon) >= -180.0
         assert np.nanmax(lon) <= 180.0
 
-    # def test_onboard_utc_dataset(self, twv_scene):
-    #     """Test loading the onboard_utc dataset."""
-    #     twv_scene.load(["onboard_utc", "sounder_pixel_latitude"])
-    #     dset = twv_scene["onboard_utc"]
+    def test_onboard_utc_dataset(self, twv_scene):
+        """Test loading the onboard_utc dataset."""
+        twv_scene.load(["onboard_utc", "sounder_pixel_latitude"])
+        dset = twv_scene["onboard_utc"]
 
-    #     assert len(dset.dims) == 2
-    #     assert dset.dims[0] == "x"
-    #     assert dset.dims[1] == "y"
+        assert len(dset.dims) == 2
+        assert dset.dims[0] == "x"
+        assert dset.dims[1] == "y"
 
-    #     assert dset.dtype == np.dtype("datetime64[ns]")
+        assert dset.dtype == np.dtype("datetime64[ns]")
 
-    #     lat = twv_scene["sounder_pixel_latitude"]
+        lat = twv_scene["sounder_pixel_latitude"]
 
-    #     assert lat.shape == dset.shape
+        assert lat.shape == dset.shape
 
     def test_nbr_iterations_dataset(self, twv_scene):
         """Test loading the nbr_iterations dataset."""