libera_utils.kernel_maker.preprocess_data

libera_utils.kernel_maker.preprocess_data(input_data_file: str | CloudPath | Path, nominal_time_field: str, pkt_time_fields: Sequence[str], kernel_identifier: DataProductIdentifier) → tuple[DataFrame, tuple[datetime, datetime]]

Preprocess kernel data to perform conversions and determine time range.

Parameters:

• input_data_file (str | filenaming.PathType) – Input data file.

• nominal_time_field (str) – Name of the field to store the converted time field as.

• pkt_time_fields (Sequence[str]) – Names of the telemetry packet time fields used to convert the time.

• kernel_identifier (DataProductIdentifier) – The kernel type being generated (needed to determine which packet reader to use).

Returns:

• pd.DataFrame – Loaded SPICE kernel data.

• datetime.datetime, datetime.datetime – The date time range of the data.