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 ---------------------------------------------------------------------------- ORB0100 170 15 130 1979-03-14T18:36:10.000Z 1979-03-14T19:09:46.000Z ORB0101 171 15 130 1979-03-15T18:35:59.000Z 1979-03-15T19:13:35.000Z ORB0102 90 15 130 1979-03-16T18:52:35.000Z 1979-03-16T19:10:23.000Z ORB0103 99 15 130 1979-03-17T19:01:11.000Z 1979-03-17T19:20:47.000Z ORB0104 192 15 130 1979-03-18T18:53:33.816Z 1979-03-18T19:32:21.816Z ORB0105 177 15 130 1979-03-19T18:54:43.816Z 1979-03-19T19:29:55.816Z ORB0106 168 15 130 1979-03-20T19:00:16.816Z 1979-03-20T19:33:40.816Z ORB0107 109 15 130 1979-03-21T19:19:14.000Z 1979-03-21T19:41:50.000Z ORB0108 127 15 130 1979-03-22T19:26:44.816Z 1979-03-22T19:52:44.816Z ORB0109 138 15 130 1979-03-23T19:30:15.816Z 1979-03-23T19:57:27.816Z ORB0110 111 15 130 1979-03-24T19:32:21.816Z 1979-03-24T19:54:21.816Z ORB0111 198 15 130 1979-03-25T19:27:49.816Z 1979-03-25T20:07:13.816Z ORB0112 225 15 130 1979-03-26T19:26:29.816Z 1979-03-26T20:11:17.816Z ORB0113 92 15 130 1979-03-27T19:47:20.816Z 1979-03-27T20:05:20.816Z ORB0114 131 15 130 1979-03-28T19:49:57.816Z 1979-03-28T20:15:45.816Z ORB0115 98 15 130 1979-03-29T19:51:46.816Z 1979-03-29T20:14:22.816Z ORB0116 141 15 130 1979-03-30T19:45:57.816Z 1979-03-30T20:20:45.816Z ORB0117 170 15 130 1979-03-31T19:59:19.816Z 1979-03-31T20:33:07.816Z ORB0118 91 15 130 1979-04-01T20:06:53.816Z 1979-04-01T20:24:41.816Z ORB0119 158 15 130 1979-04-02T20:07:00.816Z 1979-04-02T20:38:12.816Z ORB0120 154 15 130 1979-04-03T20:05:17.816Z 1979-04-03T20:35:53.816Z ORB0121 227 15 130 1979-04-04T20:09:08.816Z 1979-04-04T20:54:08.816Z ORB0122 204 15 130 1979-04-05T20:16:11.816Z 1979-04-05T20:57:11.816Z ORB0123 159 15 130 1979-04-06T20:16:23.816Z 1979-04-06T20:48:11.816Z ORB0124 184 15 130 1979-04-07T20:23:44.816Z 1979-04-07T21:00:20.816Z ORB0125 126 15 130 1979-04-08T20:37:38.816Z 1979-04-08T21:02:38.816Z ORB0126 139 15 130 1979-04-09T20:33:16.816Z 1979-04-09T21:00:40.816Z ORB0127 124 15 130 1979-04-10T20:40:50.816Z 1979-04-10T21:05:26.816Z ORB0128 112 15 130 1979-04-11T20:46:21.816Z 1979-04-11T21:08:33.816Z ORB0129 67 15 130 1979-04-12T20:56:48.816Z 1979-04-12T21:10:00.816Z ORB0130 92 15 130 1979-04-13T20:56:48.816Z 1979-04-13T21:14:48.816Z ORB0131 67 15 130 1979-04-14T21:03:53.816Z 1979-04-14T21:17:05.816Z ORB0132 71 15 130 1979-04-15T21:06:15.816Z 1979-04-15T21:20:15.816Z ORB0133 60 15 130 1979-04-16T21:11:42.816Z 1979-04-16T21:23:42.816Z ORB0134 145 15 130 1979-04-17T21:13:48.816Z 1979-04-17T21:42:36.816Z ORB0135 157 15 130 1979-04-18T21:14:56.816Z 1979-04-18T21:45:56.816Z ORB0136 150 15 130 1979-04-19T21:16:31.816Z 1979-04-19T21:46:07.816Z ORB0137 152 15 130 1979-04-20T21:22:33.816Z 1979-04-20T21:52:33.816Z ORB0138 212 15 130 1979-04-21T21:07:18.816Z 1979-04-21T21:49:54.816Z ORB0139 56 15 130 1979-04-22T21:28:30.816Z 1979-04-22T21:39:18.816Z ORB0140 194 15 130 1979-04-23T21:18:12.816Z 1979-04-23T21:56:36.816Z ORB0141 107 15 130 1979-04-24T21:30:48.816Z 1979-04-24T21:54:36.816Z ORB0142 164 15 130 1979-04-25T21:32:11.816Z 1979-04-25T22:06:11.816Z ORB0143 168 15 130 1979-04-26T21:34:05.816Z 1979-04-26T22:07:29.816Z ORB0144 242 15 130 1979-04-27T21:20:40.816Z 1979-04-27T22:09:16.816Z ORB0145 146 15 130 1979-04-28T21:23:51.816Z 1979-04-28T21:52:39.816Z ORB0146 90 15 130 1979-04-29T21:39:16.816Z 1979-04-29T21:57:04.816Z ORB0147 125 15 130 1979-04-30T21:41:52.816Z 1979-04-30T22:06:52.816Z ORB0148 97 15 130 1979-05-01T21:38:11.816Z 1979-05-01T21:57:23.816Z ORB0149 159 15 130 1979-05-02T21:39:38.816Z 1979-05-02T22:11:14.816Z ORB0150 68 15 130 1979-05-03T21:39:28.816Z 1979-05-03T21:52:52.816Z ORB0151 152 15 130 1979-05-04T21:36:11.816Z 1979-05-04T22:06:11.816Z ORB0152 77 15 130 1979-05-05T21:36:24.816Z 1979-05-05T21:51:24.816Z ORB0153 210 15 130 1979-05-06T21:27:45.816Z 1979-05-06T22:09:57.816Z ORB0154 154 15 130 1979-05-07T21:37:03.816Z 1979-05-07T22:07:27.816Z ORB0155 116 15 130 1979-05-08T21:24:36.504Z 1979-05-08T21:48:12.504Z ORB0156 167 15 130 1979-05-09T21:23:24.816Z 1979-05-09T21:56:48.816Z ORB0157 68 15 130 1979-05-10T21:34:07.560Z 1979-05-10T21:47:31.560Z ORB0158 60 15 130 1979-05-11T21:31:02.816Z 1979-05-11T21:42:38.816Z ORB0159 153 15 130 1979-05-12T21:26:03.816Z 1979-05-12T21:56:15.816Z ORB0160 153 15 130 1979-05-13T21:23:47.816Z 1979-05-13T21:54:23.816Z ORB0161 132 15 130 1979-05-14T21:15:52.816Z 1979-05-14T21:41:52.816Z ORB0162 146 15 130 1979-05-15T21:20:08.816Z 1979-05-15T21:49:08.816Z ORB0163 55 15 130 1979-05-16T21:16:41.816Z 1979-05-16T21:28:05.816Z ORB0164 237 15 130 1979-05-17T20:56:57.816Z 1979-05-17T21:44:33.816Z ORB0165 119 15 130 1979-05-18T21:06:33.816Z 1979-05-18T21:29:57.816Z ORB0166 194 15 130 1979-05-19T20:57:38.816Z 1979-05-19T21:36:14.816Z ORB0167 189 15 130 1979-05-20T20:51:16.816Z 1979-05-20T21:28:52.816Z ORB0168 147 15 130 1979-05-21T20:56:14.816Z 1979-05-21T21:25:38.816Z ORB0169 172 15 130 1979-05-22T20:46:47.816Z 1979-05-22T21:20:59.816Z ORB0170 200 15 130 1979-05-23T20:31:31.816Z 1979-05-23T21:11:07.816Z ORB0171 233 15 130 1979-05-24T20:25:32.816Z 1979-05-24T21:13:08.816Z ORB0172 172 15 130 1979-05-25T20:32:37.816Z 1979-05-25T21:07:13.816Z ORB0173 151 15 130 1979-05-26T20:19:50.816Z 1979-05-26T20:49:38.816Z ORB0174 124 15 130 1979-05-27T20:18:06.816Z 1979-05-27T20:53:06.816Z ORB0175 206 15 130 1979-05-28T20:04:06.816Z 1979-05-28T20:45:30.816Z ORB0176 138 15 130 1979-05-29T20:07:54.816Z 1979-05-29T20:35:42.816Z ORB0177 62 15 130 1979-05-30T20:03:07.816Z 1979-05-30T20:15:07.816Z ORB0178 101 15 130 1979-05-31T19:54:29.816Z 1979-05-31T20:20:53.816Z ORB0179 119 15 130 1979-06-01T19:52:09.816Z 1979-06-01T20:15:33.816Z ORB0180 153 15 130 1979-06-02T20:12:28.816Z 1979-06-02T20:43:04.816Z ORB0181 50 15 130 1979-06-03T20:19:57.816Z 1979-06-03T20:37:45.816Z ORB0182 65 15 130 1979-06-04T20:26:35.816Z 1979-06-04T20:58:11.816Z ORB0183 148 15 130 1979-06-05T20:35:37.816Z 1979-06-05T21:05:49.816Z ORB0184 75 15 130 1979-06-06T20:38:56.816Z 1979-06-06T20:59:08.816Z ORB0185 164 15 130 1979-06-07T20:47:46.816Z 1979-06-07T21:20:34.816Z ORB0186 104 15 130 1979-06-08T20:55:06.816Z 1979-06-08T21:15:30.816Z ORB0188 73 15 130 1979-06-10T21:08:35.816Z 1979-06-10T21:23:11.816Z ORB0189 170 15 130 1979-06-11T21:10:59.816Z 1979-06-11T21:44:35.816Z ORB0190 207 15 130 1979-06-12T21:10:33.816Z 1979-06-12T21:52:21.816Z ORB0191 141 15 130 1979-06-13T21:28:51.816Z 1979-06-13T21:56:51.816Z ORB0192 20 15 130 1979-06-14T21:36:32.104Z 1979-06-14T21:48:56.104Z ORB0194 103 15 130 1979-06-16T21:31:29.816Z 1979-06-16T21:51:53.816Z ORB0195 187 15 130 1979-06-17T21:33:53.816Z 1979-06-17T22:11:17.816Z ORB0197 132 15 130 1979-06-19T21:42:14.816Z 1979-06-19T22:12:50.816Z ORB0198 96 15 130 1979-06-20T21:49:28.816Z 1979-06-20T22:08:52.816Z 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.