DATA_SET_DESCRIPTION |
Data Set Overview: The Plasma Wave Data were submitted to National Space Science Data Center after the Principal Investigator's death (Scarf) by S. Chang of TRW. For the electric field data, the time interval submitted was Sept 9 - 14, 1985; only a file layout was included. That information, as well as an explanation of the reformatted data is detailed below: The filenames were submitted with the following format PEyymmdd.# where P signifies processed ascii data E stands for e-field data yy is the last 2 digits of the year mm is a decimal month dd stands for day hh stands for hour # is a file number that consecutively increases E-channel data file Header - two lines Year and Day of Year Number File starting time (in milliseconds from the start of the day and in hh:mm:ss.ss) and file ending time (in the same format) Subheader - one line (flagged by a -99 at the beginning of the line) Bit rate (values: 1 : 1 second data samples, 2 : 0.5 second, 3 : 2 second, 4 : 8 second) and antenna modes (values: 1 : u, 2 : v, 0 : bad) separated by commas. Note that subheaders may not always be followed by data. If there was bad header data, the frame was zeroed out. Data - Time in milliseconds, calibrated 16 channel data (in order of lowest to highest frequency. Values: 17.8, 31.6, 56.2, 100, 178, 316, 562, 1000, 1780, 3160, 5620, 10000, 17800, 31600, 56200, 100000 Hz) These data were reformatted into simplified ASCII tables (Emmdd###.tab) as follows: 1. the lines with year, and DOY are dropped; the TIME is represented in the PDS label as a MEASUREMENT_START_ or MEASUREMENT_STOP_ value. 2. the flag fields are dropped; the processing information is contained in the description field of the PDS label (same filename, but '.lbl' extension). 3. all the intervening flag fields have been dropped; the data now organized as a flat ASCII table terminated by a carriage return and line field. NOTE: the sampling rate changed from 1 sec (Sept 9 - 11) to 2 sec after 18:38 on Sept 12. In addition, some of the indicated time ranges for the filename are not exact, e.g., E1109038 has data from 09 h through 11 h 55m.
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