Fix data type when getting a line offset for a segmented hrit_jma

AUTHORS.md

@@ -38,6 +38,7 @@ The following people have made contributions to this project:
 - [Gerrit Holl (gerritholl)](https://github.com/gerritholl) - Deutscher Wetterdienst
 - [David Hoese (djhoese)](https://github.com/djhoese)
 - [Marc Honnorat (honnorat)](https://github.com/honnorat)
+- [Mario Hros (k3a)](https://github.com/k3a)
 - [Lloyd Hughes (system123)](https://github.com/system123)
 - [Sara Hörnquist (shornqui)](https://github.com/shornqui)
 - [Mikhail Itkin (mitkin)](https://github.com/mitkin)

satpy/readers/hrit_jma.py

@@ -345,8 +345,8 @@ def _get_line_offset(self):
         if self.is_segmented:
             # loff in the file specifies the offset of the full disk image
             # centre (1375/2750 for VIS/IR)
-            segment_number = self.mda["segment_sequence_number"] - 1
-            loff -= (self.mda["total_no_image_segm"] - segment_number - 1) * nlines
+            segment_number = int(self.mda["segment_sequence_number"]) - 1
+            loff -= (int(self.mda["total_no_image_segm"]) - segment_number - 1) * nlines
         elif self.area_id in (NORTH_HEMIS, SOUTH_HEMIS):
             # loff in the file specifies the start line of the half disk image
             # in the full disk image

satpy/tests/reader_tests/test_ahi_hrit.py

@@ -75,8 +75,8 @@ def _get_mda(self, loff=5500.0, coff=5500.0, nlines=11000, ncols=11000,
         proj_h8 = b"GEOS(140.70)                    "
         proj_mtsat2 = b"GEOS(145.00)                    "
         proj_name = proj_h8 if platform == "Himawari-8" else proj_mtsat2
-        return {"image_segm_seq_no": segno,
-                "total_no_image_segm": numseg,
+        return {"image_segm_seq_no": np.uint8(segno),
+                "total_no_image_segm": np.uint8(numseg),
                 "projection_name": proj_name,
                 "projection_parameters": {
                     "a": 6378169.00,
@@ -85,10 +85,10 @@ def _get_mda(self, loff=5500.0, coff=5500.0, nlines=11000, ncols=11000,
                 },
                 "cfac": 10233128,
                 "lfac": 10233128,
-                "coff": coff,
-                "loff": loff,
-                "number_of_columns": ncols,
-                "number_of_lines": nlines,
+                "coff": np.int32(coff),
+                "loff": np.int32(loff),
+                "number_of_columns": np.uint16(ncols),
+                "number_of_lines": np.uint16(nlines),
                 "image_data_function": idf,
                 "image_observation_time": self._get_acq_time(nlines)}