import xradar as xd
import fsspec
filepath = "s3://noaa-nexrad-level2/2004/02/19/KVNX/KVNX20040219_043517.gz"
storage_options = {"anon": True}
stream = fsspec.open(filepath, 
                     mode="rb", 
                     compression= "gzip", 
                     **storage_options).open()
dtree = xd.io.open_nexradlevel2_datatree(stream.read())

---------------------------------------------------------------------------
IndexError                                Traceback (most recent call last)
Cell In[36], line 6
      1 storage_options = {"anon": True}
      2 stream = fsspec.open(filepath, 
      3                      mode="rb", 
      4                      compression= "gzip", 
      5                      **storage_options).open()
----> 6 dtree = xd.io.open_nexradlevel2_datatree(stream.read())

File [~/mambaforge/envs/raw2zarr-dev/lib/python3.12/site-packages/xradar/io/backends/nexrad_level2.py:1724](http://localhost:8888/lab/tree/notebooks/~/mambaforge/envs/raw2zarr-dev/lib/python3.12/site-packages/xradar/io/backends/nexrad_level2.py#line=1723), in open_nexradlevel2_datatree(filename_or_obj, mask_and_scale, decode_times, concat_characters, decode_coords, drop_variables, use_cftime, decode_timedelta, sweep, first_dim, reindex_angle, fix_second_angle, site_coords, optional, lock, **kwargs)
   1721 else:
   1722     with NEXRADLevel2File(filename_or_obj, loaddata=False) as nex:
   1723         # Expected number of elevation cuts from the VCP definition
-> 1724         exp_sweeps = nex.msg_5["number_elevation_cuts"]
   1725         # Actual number of sweeps recorded in the file
   1726         act_sweeps = len(nex.msg_31_data_header)

File [~/mambaforge/envs/raw2zarr-dev/lib/python3.12/site-packages/xradar/io/backends/nexrad_level2.py:493](http://localhost:8888/lab/tree/notebooks/~/mambaforge/envs/raw2zarr-dev/lib/python3.12/site-packages/xradar/io/backends/nexrad_level2.py#line=492), in NEXRADLevel2File.msg_5(self)
    491 """Retrieve MSG5 data."""
    492 if self._msg_5_data is None:
--> 493     self._msg_5_data = self.get_msg_5_data()
    494 return self._msg_5_data

File [~/mambaforge/envs/raw2zarr-dev/lib/python3.12/site-packages/xradar/io/backends/nexrad_level2.py:562](http://localhost:8888/lab/tree/notebooks/~/mambaforge/envs/raw2zarr-dev/lib/python3.12/site-packages/xradar/io/backends/nexrad_level2.py#line=561), in NEXRADLevel2File.get_msg_5_data(self)
    560 """Get MSG5 data."""
    561 # get the record number from the meta header
--> 562 recnum = self.meta_header["msg_5"][0]["record_number"]
    563 self.init_record(recnum)
    564 # skip header

IndexError: list index out of range