Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/dsp/fast/l2/epsd/2015/09/mms3_dsp_fast_l2_epsd_20150901_v0.6.4.cdf. The most common cadence, 2000023933 [ns] = PT2.000024S, occurred for 73.5294% of the 25 timesteps. 

Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/dsp/fast/l2/epsd/2025/03/mms3_dsp_fast_l2_epsd_20250327_v0.6.2.cdf. The most common cadence, 2000028288 [ns] = PT2.000028S, occurred for 2.8112% of the 975 timesteps. 

Epoch_timetag['VarData'] = None in in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/dsp/fast/l2/epsd/2015/09/mms3_dsp_fast_l2_epsd_20150901_v0.6.4.cdf; CDF metadata = {'Epoch_timetag': {'VarDescription': {'BlockingFactor': 0, 'Compress': 0, 'DataTypeValue': 33, 'DataType': 'CDF_TIME_TT2000', 'DimSizes': [], 'DimVariances': [], 'LastRecord': -1, 'Num': 1, 'NumDims': 0, 'NumElements': 1, 'PadValue': array([-9223372036854775807]), 'RecVariance': True, 'SparseRecords': 'No_sparse', 'VarType': 'zVariable', 'VariableName': 'Epoch_timetag'}, 'VarAttributes': {'FIELDNAM': 'Time Line', 'VALIDMIN': -946727959814622001, 'VALIDMAX': 946728069183999999, 'SCALETYP': 'linear', 'LABLAXIS': 'Epoch_timetag', 'UNITS': 'ns', 'FORMAT': 'E14.8', 'DELTA_PLUS_VAR': 'TT2000_End', 'DELTA_MINUS_VAR': 'TT2000_Start', 'MONOTON': 'INCREASE', 'CATDESC': 'Start Time for the record', 'FILLVAL': -9223372036854775808, 'DICT_KEY': ' ', 'VAR_TYPE': 'support_data', 'DISPLAY_TYPE': ' ', 'Calib_input': ' ', 'Calib_software': ' ', 'Frame': 'scalar>na', 'Sig_digits': '10', 'SI_conversion': 'na'}, 'VarData': None}}

Epoch_timetag['VarData'] = None in in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms3/dsp/fast/l2/epsd/2025/03/mms3_dsp_fast_l2_epsd_20250327_v0.6.2.cdf; CDF metadata = {'Epoch_timetag': {'VarDescription': {'BlockingFactor': 0, 'Compress': 0, 'DataTypeValue': 33, 'DataType': 'CDF_TIME_TT2000', 'DimSizes': [], 'DimVariances': [], 'LastRecord': -1, 'Num': 1, 'NumDims': 0, 'NumElements': 1, 'PadValue': array([-9223372036854775807]), 'RecVariance': True, 'SparseRecords': 'No_sparse', 'VarType': 'zVariable', 'VariableName': 'Epoch_timetag'}, 'VarAttributes': {'FIELDNAM': 'Time Line', 'VALIDMIN': -946727959814622001, 'VALIDMAX': 946728069183999999, 'SCALETYP': 'linear', 'LABLAXIS': 'Epoch_timetag', 'UNITS': 'ns', 'FORMAT': 'E14.8', 'DELTA_PLUS_VAR': 'TT2000_End', 'DELTA_MINUS_VAR': 'TT2000_Start', 'MONOTON': 'INCREASE', 'CATDESC': 'Start Time for the record', 'FILLVAL': -9223372036854775808, 'DICT_KEY': ' ', 'VAR_TYPE': 'support_data', 'DISPLAY_TYPE': ' ', 'Calib_input': ' ', 'Calib_software': ' ', 'Frame': 'scalar>na', 'Sig_digits': '10', 'SI_conversion': 'na'}, 'VarData': None}}