Is the 31(32)-band read by the modis_l1b reader converted to bright temperature by default?

[yhyxzx]

MO_name = find_files_and_readers(start_time = datetime.datetime(2018,1,13),
                                    end_time = datetime.datetime(2018, 1, 14),
                                    base_dir = MO_dir,
                                    reader = 'modis_l1b')
MO_scn = Scene(filenames = MO_name)

MO_scn.load(["31"])

MO_31_pch= MO_scn['31'].values

print(MO_31_pch)

[[224.82077534 224.82077534 224.06764512 ... 268.48123397 269.34750602
  269.61057643]
 [225.25929876 225.11348828 224.15675673 ... 265.08996456 268.6422733
  269.05164946]
 [225.39022088 225.65119515 224.3197752  ... 261.12642697 267.41116957
  268.91539533]
 ...
 [254.71886542 248.50381537 250.49844873 ... 279.8721415  279.42006056
  277.73754198]
 [252.45219378 249.15759788 247.95806128 ... 279.92225038 279.09590572
  278.03694683]
 [250.93690751 248.38059802 251.12547422 ... 279.72884208 278.98039645
  279.05260576]]

[djhoese]

Yes. Just for reference here is the YAML entry:

satpy/satpy/etc/readers/modis_l1b.yaml

Lines 342 to 351 in aaddc82

	'31':
	file_type: hdf_eos_data_1000m
	name: '31'
	resolution: 1000
	calibration: [brightness_temperature, radiance]
	coordinates: [longitude, latitude]
	wavelength:
	- 10.78
	- 11.03
	- 11.28

You can also check out MO_scn['31'].attrs which will usually include things like standard_name (the CF standard name), units, and other related metadata which should give you an insight into what format the data is in.

[yhyxzx]

Ok，thank you!