Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms1/dsp/fast/l2/bpsd/2015/09/mms1_dsp_fast_l2_bpsd_20150901_v2.1.1.cdf. The most common cadence, 2000024736 [ns] = PT2.000025S, occurred for 1.1884% of the 300 timesteps. 

Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms1/dsp/fast/l2/bpsd/2025/03/mms1_dsp_fast_l2_bpsd_20250327_v2.2.2.cdf. The most common cadence, 2000027776 [ns] = PT2.000028S, occurred for 2.8107% of the 975 timesteps. 

epoch_timetag['VarData'] = None in in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms1/dsp/fast/l2/bpsd/2015/09/mms1_dsp_fast_l2_bpsd_20150901_v2.1.1.cdf; CDF metadata = {'epoch_timetag': {'VarDescription': {'BlockingFactor': 0, 'Compress': 0, 'DataTypeValue': 33, 'DataType': 'CDF_TIME_TT2000', 'DimSizes': [], 'DimVariances': [], 'LastRecord': -1, 'Num': 5, 'NumDims': 0, 'NumElements': 1, 'PadValue': array([-9223372036854775807]), 'RecVariance': True, 'SparseRecords': 'No_sparse', 'VarType': 'zVariable', 'VariableName': 'epoch_timetag'}, 'VarAttributes': {'FIELDNAM': 'epoch_timetag', 'VALIDMIN': -43135816000000, 'VALIDMAX': 946728070183000000, 'SCALETYP': 'linear', 'LABLAXIS': 'epoch_timetag', 'UNITS': 'ns', 'MONOTON': 'INCREASE', 'CATDESC': 'packet time tag', 'FILLVAL': -9223372036854775808, 'VAR_TYPE': 'support_data'}, 'VarData': None}}

epoch_timetag['VarData'] = None in in https://cdaweb.gsfc.nasa.gov/sp_phys/data/mms/mms1/dsp/fast/l2/bpsd/2025/03/mms1_dsp_fast_l2_bpsd_20250327_v2.2.2.cdf; CDF metadata = {'epoch_timetag': {'VarDescription': {'BlockingFactor': 0, 'Compress': 0, 'DataTypeValue': 33, 'DataType': 'CDF_TIME_TT2000', 'DimSizes': [], 'DimVariances': [], 'LastRecord': -1, 'Num': 5, 'NumDims': 0, 'NumElements': 1, 'PadValue': array([-9223372036854775807]), 'RecVariance': True, 'SparseRecords': 'No_sparse', 'VarType': 'zVariable', 'VariableName': 'epoch_timetag'}, 'VarAttributes': {'FIELDNAM': 'epoch_timetag', 'VALIDMIN': -43135816000000, 'VALIDMAX': 946728070183000000, 'SCALETYP': 'linear', 'LABLAXIS': 'epoch_timetag', 'UNITS': 'ns', 'MONOTON': 'INCREASE', 'CATDESC': 'packet time tag', 'FILLVAL': -9223372036854775808, 'VAR_TYPE': 'support_data'}, 'VarData': None}}