PVO Ion Mass Spectrometer low-resolution data are stored in single-orbit ASCII files. These files can be converted to UADS-compliant file structures by concatenation of the UADS_HDR.TXT file with an individual data file (header first!). All of the data files have the same internal structure, which is described by the single format file OIMSDATA.FMT. File structure characteristics which may vary from file to file (# of records, start/stop time, etc.) are described in the individual PDS label files. /-------------------------\ | D A T A | \-------------------------/ Columns in all data files: ===================================================== name type description ----------------------------------------------------- PVO TIME int Date and time in format YYDOY FSEC, where YY is the year, DOY is the day-of-year & FSEC is the decimal second-of-day ORBIT integer PVO orbit number PERISECS float Seconds after periapsis (negative before periapsis) DEN_1 integer Number density of 1 AMU particles DEN_2 integer Number density of 2 AMU particles DEN_4 integer Number density of 4 AMU particles DEN_8 integer Number density of 8 AMU particles DEN_12 integer Number density of 12 AMU particles DEN_14 integer Number density of 14 AMU particles DEN_16 integer Number density of 16 AMU particles DEN_18 integer Number density of 18 AMU particles DEN_28 integer Number density of 28 AMU particles DEN_30 integer Number density of 30 AMU particles DEN_32 integer Number density of 32 AMU particles DEN_44 integer Number density of 44 AMU particles Any number density data item whose value equals -999999 is a missing data value. Missing data values in the seconds-after-periapsis column are indicated by the value -9999.999. Data Files (.TAB extension) The high-resolution data files on this disk are ASCII table files, each having 15 columns and record length 130 bytes. Information about the individual files (number of records, start and stop times, etc.) can be obtained from the PDS label file accompanying each *.TAB file. This label file has the same filename as the data file but with .TAB replaced by .LBL. List of data files: ============================================================================ Name Records Cols Len Start Stop ---------------------------------------------------------------------------- ORB0001 187 15 130 1978-12-05T14:46:46.816Z 1978-12-05T15:35:10.816Z ORB0003 61 15 130 1978-12-07T14:24:11.000Z 1978-12-07T14:36:23.000Z ORB0004 179 15 130 1978-12-08T14:15:22.816Z 1978-12-08T15:03:46.816Z ORB0005 85 15 130 1978-12-09T14:38:59.000Z 1978-12-09T15:00:11.000Z ORB0006 155 15 130 1978-12-10T14:31:23.000Z 1978-12-10T15:17:59.000Z ORB0007 201 15 130 1978-12-11T14:40:10.816Z 1978-12-11T15:25:58.816Z ORB0008 129 15 130 1978-12-12T14:54:15.608Z 1978-12-12T15:24:03.608Z ORB0009 95 15 130 1978-12-13T15:15:04.816Z 1978-12-13T15:39:28.816Z ORB0010 82 15 130 1978-12-14T15:04:10.816Z 1978-12-14T15:34:58.816Z ORB0011 132 15 130 1978-12-15T15:15:59.908Z 1978-12-15T15:58:23.908Z ORB0012 186 15 130 1978-12-16T15:23:12.816Z 1978-12-16T16:09:36.816Z ORB0013 54 15 130 1978-12-17T15:52:10.816Z 1978-12-17T16:10:10.816Z ORB0014 211 15 130 1978-12-18T15:40:58.816Z 1978-12-18T16:29:22.816Z ORB0015 74 15 130 1978-12-19T15:49:46.816Z 1978-12-19T16:04:22.816Z ORB0016 112 15 130 1978-12-20T16:06:22.816Z 1978-12-20T16:35:58.816Z ORB0017 210 15 130 1978-12-21T16:07:10.816Z 1978-12-21T16:50:22.816Z ORB0018 221 15 130 1978-12-22T16:15:46.816Z 1978-12-22T17:02:22.816Z ORB0019 184 15 130 1978-12-23T16:27:34.816Z 1978-12-23T17:06:46.816Z ORB0020 150 15 130 1978-12-24T16:32:22.816Z 1978-12-24T17:05:22.816Z ORB0021 62 15 130 1978-12-25T16:57:22.816Z 1978-12-25T17:14:46.816Z ORB0022 215 15 130 1978-12-26T16:48:34.816Z 1978-12-26T17:35:58.816Z ORB0023 57 15 130 1978-12-27T17:14:55.816Z 1978-12-27T17:26:19.816Z ORB0024 96 15 130 1978-12-28T17:12:35.816Z 1978-12-28T17:42:23.816Z ORB0025 236 15 130 1978-12-29T17:13:28.816Z 1978-12-29T18:01:52.816Z ORB0026 208 15 130 1978-12-30T17:20:53.816Z 1978-12-30T18:09:41.816Z ORB0027 219 15 130 1978-12-31T17:28:52.816Z 1978-12-31T18:18:04.816Z ORB0028 238 15 130 1979-01-01T17:36:49.816Z 1979-01-01T18:26:13.816Z ORB0030 242 15 130 1979-01-03T17:52:39.816Z 1979-01-03T18:42:03.816Z ORB0031 62 15 130 1979-01-04T18:14:14.816Z 1979-01-04T18:26:50.816Z ORB0032 96 15 130 1979-01-05T18:10:57.816Z 1979-01-05T18:39:45.816Z ORB0033 217 15 130 1979-01-06T18:07:27.816Z 1979-01-06T18:54:39.816Z ORB0034 179 15 130 1979-01-07T18:12:21.816Z 1979-01-07T19:01:09.816Z ORB0041 217 15 130 1979-01-14T18:44:46.816Z 1979-01-14T19:33:34.816Z ORB0042 214 15 130 1979-01-15T18:49:53.816Z 1979-01-15T19:37:53.816Z ORB0043 177 15 130 1979-01-16T18:59:48.816Z 1979-01-16T19:42:36.816Z ORB0044 124 15 130 1979-01-17T18:58:34.816Z 1979-01-17T19:37:58.816Z ORB0045 76 15 130 1979-01-18T19:26:32.816Z 1979-01-18T19:43:08.816Z ORB0046 175 15 130 1979-01-19T19:09:40.816Z 1979-01-19T19:52:28.816Z ORB0048 203 15 130 1979-01-21T19:18:42.816Z 1979-01-21T20:00:18.816Z ORB0049 234 15 130 1979-01-22T19:15:13.816Z 1979-01-22T20:02:25.816Z ORB0050 238 15 130 1979-01-23T19:18:45.816Z 1979-01-23T20:07:57.816Z ORB0051 210 15 130 1979-01-24T19:22:04.816Z 1979-01-24T20:04:04.816Z ORB0052 134 15 130 1979-01-25T19:24:31.816Z 1979-01-25T20:08:43.816Z ORB0053 95 15 130 1979-01-26T19:45:45.816Z 1979-01-26T20:08:57.816Z ORB0054 221 15 130 1979-01-27T19:29:21.816Z 1979-01-27T20:13:57.816Z ORB0055 207 15 130 1979-01-28T19:33:58.816Z 1979-01-28T20:16:22.816Z ORB0056 134 15 130 1979-01-29T19:51:10.816Z 1979-01-29T20:21:22.816Z ORB0057 213 15 130 1979-01-30T19:36:35.816Z 1979-01-30T20:20:47.816Z ORB0058 215 15 130 1979-01-31T19:38:58.816Z 1979-01-31T20:22:34.816Z ORB0059 128 15 130 1979-02-01T19:39:43.816Z 1979-02-01T20:13:55.816Z ORB0060 161 15 130 1979-02-02T19:55:49.000Z 1979-02-02T20:28:49.000Z ORB0061 96 15 130 1979-02-03T19:58:27.000Z 1979-02-03T20:20:51.000Z ORB0062 169 15 130 1979-02-04T19:42:18.000Z 1979-02-04T20:16:06.000Z ORB0063 149 15 130 1979-02-05T19:43:08.000Z 1979-02-05T20:26:20.000Z ORB0064 108 15 130 1979-02-06T19:43:58.000Z 1979-02-06T20:28:34.000Z ORB0065 204 15 130 1979-02-07T19:44:35.816Z 1979-02-07T20:32:47.816Z ORB0066 231 15 130 1979-02-08T19:44:29.816Z 1979-02-08T20:31:05.816Z ORB0067 150 15 130 1979-02-09T19:43:58.816Z 1979-02-09T20:27:22.816Z ORB0068 235 15 130 1979-02-10T19:45:02.816Z 1979-02-10T20:32:14.816Z ORB0070 165 15 130 1979-02-12T19:43:21.000Z 1979-02-12T20:27:09.000Z ORB0071 14 15 130 1979-02-13T20:15:58.000Z 1979-02-13T20:18:34.000Z ORB0072 159 15 130 1979-02-14T19:42:00.528Z 1979-02-14T20:29:36.528Z ORB0073 73 15 130 1979-02-15T19:43:00.000Z 1979-02-15T20:13:36.000Z ORB0074 149 15 130 1979-02-16T19:39:08.000Z 1979-02-16T20:08:56.000Z ORB0075 89 15 130 1979-02-17T19:41:15.000Z 1979-02-17T20:07:15.000Z ORB0076 113 15 130 1979-02-18T19:36:22.000Z 1979-02-18T20:06:58.000Z ORB0077 229 15 130 1979-02-19T19:34:40.000Z 1979-02-19T20:20:28.000Z ORB0078 150 15 130 1979-02-20T19:33:32.816Z 1979-02-20T20:04:20.816Z ORB0079 176 15 130 1979-02-21T19:31:27.000Z 1979-02-21T20:06:51.000Z ORB0080 125 15 130 1979-02-22T19:28:57.000Z 1979-02-22T20:06:21.000Z ORB0081 230 15 130 1979-02-23T19:26:49.000Z 1979-02-23T20:12:25.000Z ORB0082 100 15 130 1979-02-24T19:45:39.000Z 1979-02-24T20:05:39.000Z ORB0083 43 15 130 1979-02-25T19:41:39.816Z 1979-02-25T19:53:51.816Z ORB0084 128 15 130 1979-02-26T19:39:03.000Z 1979-02-26T20:05:39.000Z ORB0085 204 15 130 1979-02-27T19:16:19.000Z 1979-02-27T20:04:19.000Z ORB0086 81 15 130 1979-02-28T19:30:38.000Z 1979-02-28T19:52:50.000Z ORB0087 195 15 130 1979-03-01T19:09:17.000Z 1979-03-01T19:48:17.000Z ORB0088 52 15 130 1979-03-02T19:08:53.000Z 1979-03-02T19:41:41.000Z ORB0090 124 15 130 1979-03-04T19:13:32.000Z 1979-03-04T19:38:44.000Z ORB0091 203 15 130 1979-03-05T19:03:48.816Z 1979-03-05T19:45:00.816Z ORB0092 73 15 130 1979-03-06T18:51:53.000Z 1979-03-06T19:27:05.000Z ORB0093 170 15 130 1979-03-07T18:49:44.000Z 1979-03-07T19:23:20.000Z ORB0094 165 15 130 1979-03-08T18:46:22.000Z 1979-03-08T19:19:22.000Z ORB0095 116 15 130 1979-03-09T18:54:11.000Z 1979-03-09T19:17:35.000Z ORB0096 46 15 130 1979-03-10T18:51:24.000Z 1979-03-10T19:11:12.000Z ORB0097 193 15 130 1979-03-11T18:35:35.000Z 1979-03-11T19:16:35.000Z ORB0098 174 15 130 1979-03-12T18:31:22.000Z 1979-03-12T19:06:10.000Z ORB0099 133 15 130 1979-03-13T18:42:07.000Z 1979-03-13T19:11:19.000Z Catalog Files (.CAT extension) Catalog data, which includes instrument, dataset, mission and spacecraft descriptions, can be found in the *.CAT files in the CATALOG directory on this disk.