{ "startDate": "2012-11-13T22:06:46Z", "stopDate": "2019-10-14T14:25:09Z", "sampleStartDate": "2019-10-13T00:00:01Z", "sampleStopDate": "2019-10-13T23:59:58Z", "cadence": "PT1.213S", "x_cadence_fraction": 0.2579505300353357, "x_cadence_note": "Counts based on variable 'Epoch' in https://cdaweb.gsfc.nasa.gov/sp_phys/data/rbsp/rbspa/l2/rbspice/esrhelt/2012/rbsp-a-rbspice_lev-2_esrhelt_20121113_v1.2.4-00.cdf. The most common cadence, 1213000000 [ns] = PT1.213S, occurred for 25.7951% of the 146 timesteps. 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