write scaled integers for radiances

himawari/ahi2cmi.py

@@ -161,15 +161,26 @@ class HimawariAHIasCMIP(object):
         CMI:ancillary_variables = "DQF" ;
         :return: dictionary of GOES-R PUG-complaint CMIP attributes for data
         """
-        return {
+        if self._as_radiances:
+            cal = self._hs.calibration
+            sf, ao = cal.rad_m, cal.rad_b
+            zult = {
+                'scale_factor': sf,  # results in netcdf layer storing scaled integers
+                'add_offset': ao,
+                '.dtype': np.int16
+            }
+        else:
+            zult = {}
+        zult.update({
             'long_name': self.long_name,
             'standard_name': self.standard_name,
             'units': self.units,
             'grid_mapping': self._projection_name,
             'coordinates': 'band_id band_wavelength t y x',
-            'sensor_band_bit_depth': self.bit_depth
+            'sensor_band_bit_depth': self.bit_depth,
             # 'resolution':
-        }
+        })
+        return zult
 
     @property
     def data_dims(self):