Error upon trying calibration of Simrad EK80 .nc converted file: Key Error "transmit_type"

[icaro-00]

Hello all! I am currently trying to get sv values from Simrad EK80 echosounder. I converted the .raw file to .nc (netCDF4) files. I am now moving on the second step, where I am processing the .nc converted file and calibrate to get sv values. However, if I run the script provided, I run into the error:

KeyError: 'transmit_type'

Does anyone know how to proceed to fix it? Or am I missing some mid-steps prior to calibration? Or?

The code I run:

nc_path = r"C:\Users\Runner\Desktop\Echopype_v2.0\unpacked_files\20230925--D20230925-T083404.nc"
echodata = ep.open_converted(nc_path)

ds_Sv = ep.calibrate.compute_Sv(echodata, waveform_mode="CW", encode_mode="complex")

I get this error:

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KeyError Traceback (most recent call last) ~\anaconda3\envs\Echopype\lib\site-packages\xarray\core\dataset.py in ?(self, name) 1446 variable = self.variables[name] 1447 except KeyError: -> 1448 , name, variable = _get_virtual_variable(self._variables, name, self.dims) 1449

KeyError: 'transmit_type'

During handling of the above exception, another exception occurred:

KeyError Traceback (most recent call last) ~\AppData\Local\Temp\ipykernel_24036\2366883360.py in ?() 1 nc_path = r"C:\Users\Runner\Desktop\Echopype_v2.0\unpacked_files\20230925--D20230925-T083404.nc" # path to a converted nc file 2 echodata = ep.open_converted(nc_path) # create an EchoData object 3 4 # For EK80 data, you need to specify waveform_mode and encode_mode ----> 5 ds_Sv = ep.calibrate.compute_Sv(echodata, waveform_mode="CW", encode_mode="complex")

~\anaconda3\envs\Echopype\lib\site-packages\echopype\calibrate\api.py in ?(echodata, kwargs) 202 The returned xr.Dataset will contain the variable water_level from the 203 EchoData object provided, if it exists. If water_level is not returned, 204 it must be set using EchoData.update_platform(). 205 """ --> 206 return _compute_cal(cal_type="Sv", echodata=echodata, kwargs)

~\anaconda3\envs\Echopype\lib\site-packages\echopype\calibrate\api.py in ?(cal_type, echodata, env_params, cal_params, ecs_file, waveform_mode, encode_mode) 45 "(encode_mode='power'). Calibration will be done on the power samples.", 46 ) 47 48 # Set up calibration object ---> 49 cal_obj = CALIBRATOR[echodata.sonar_model]( 50 echodata, 51 env_params=env_params, 52 cal_params=cal_params,

~\anaconda3\envs\Echopype\lib\site-packages\echopype\calibrate\calibrate_ek.py in ?(self, echodata, env_params, cal_params, waveform_mode, encode_mode, ecs_file, **kwargs) 231 self.encode_mode = encode_mode 232 self.echodata = echodata 233 234 # Get the right ed_beam_group given waveform and encode mode --> 235 self.ed_beam_group = retrieve_correct_beam_group( 236 echodata=self.echodata, waveform_mode=self.waveform_mode, encode_mode=self.encode_mode 237 ) 238

~\anaconda3\envs\Echopype\lib\site-packages\echopype\echodata\simrad.py in ?(echodata, waveform_mode, encode_mode) 214 power_ed_group = _retrieve_correct_beam_group_EK60(echodata, waveform_mode, encode_mode) 215 216 elif echodata.sonar_model in ["EK80", "ES80", "EA640"]: 217 # check modes against data for EK80 and get power/complex EchoData groups --> 218 power_ed_group, complex_ed_group = _retrieve_correct_beam_group_EK80( 219 echodata, waveform_mode, encode_mode 220 ) 221

~\anaconda3\envs\Echopype\lib\site-packages\echopype\echodata\simrad.py in ?(echodata, waveform_mode, encode_mode) 119 # initialize power and complex EchoData group values 120 power_ed_group = None 121 complex_ed_group = None 122 --> 123 transmit_type = echodata["Sonar/Beam_group1"]["transmit_type"] 124 # assume transmit_type identical for all pings in a channel 125 # TODO: change when allowing within-channel CW-BB switch 126 first_ping_transmit_type = transmit_type.isel(ping_time=0)

~\anaconda3\envs\Echopype\lib\site-packages\xarray\core\dataset.py in ?(self, key) 1540 """ 1541 if utils.is_dict_like(key): 1542 return self.isel(**key) 1543 if utils.hashable(key): -> 1544 return self._construct_dataarray(key) 1545 if utils.iterable_of_hashable(key): 1546 return self._copy_listed(key) 1547 raise ValueError(f"Unsupported key-type {type(key)}")

~\anaconda3\envs\Echopype\lib\site-packages\xarray\core\dataset.py in ?(self, name) 1444 1445 try: 1446 variable = self.variables[name] 1447 except KeyError: -> 1448 , name, variable = _get_virtual_variable(self._variables, name, self.dims) 1449 1450 needed_dims = set(variable.dims) 1451

~\anaconda3\envs\Echopype\lib\site-packages\xarray\core\dataset.py in ?(variables, key, dim_sizes) 210 raise KeyError(key) 211 212 split_key = key.split(".", 1) 213 if len(split_key) != 2: --> 214 raise KeyError(key) 215 216 ref_name, var_name = split_key 217 ref_var = variables[ref_name]

KeyError: 'transmit_type'

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Here the file I used which gets the error: https://wetransfer.com/downloads/ee4a868b5db95171236132f6a6820b8b20231110080045/5d3a7e

Thanks a lot again for helping out!

[praneethratna]

@icaro-00 Thanks for reporting this! could you share the .raw file instead so that we can debug this better?

[icaro-00]

Hi @praneethratna,

herw you can find the .raw file:

https://wetransfer.com/downloads/eb68d6d87000a25190be02c76d02863120231112054603/4a0e37

thanks for helping!

[praneethratna]

Hey @icaro-00 Could you re-upload the file again if possible, so that we can look into the issue? Thanks!

[leewujung]

@icaro-00 : Also pinging here to see if you could provide an update of the link to download data files. Thanks!

[leewujung]

Closing this as we do not have access to example files. @icaro-00 feel free to reopen.