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 ---------------------------------------------------------------------------- ORB1500 42 15 130 1983-01-14T00:52:54.851Z 1983-01-14T01:01:54.851Z ORB1501 204 15 130 1983-01-16T00:54:10.357Z 1983-01-16T01:34:58.357Z ORB1502 101 15 130 1983-01-16T00:50:14.389Z 1983-01-16T01:10:26.389Z ORB1503 142 15 130 1983-01-18T00:52:07.067Z 1983-01-18T01:27:43.067Z ORB1504 209 15 130 1983-01-18T00:50:12.331Z 1983-01-18T01:35:12.331Z ORB1505 184 15 130 1983-01-20T00:54:54.185Z 1983-01-20T01:33:54.185Z ORB1506 193 15 130 1983-01-20T00:52:00.631Z 1983-01-20T01:31:24.631Z ORB1507 166 15 130 1983-01-22T00:56:07.667Z 1983-01-22T01:30:55.667Z ORB1508 134 15 130 1983-01-22T00:55:27.291Z 1983-01-22T01:22:27.291Z ORB1509 174 15 130 1983-01-24T00:55:11.499Z 1983-01-24T01:32:35.499Z ORB1510 129 15 130 1983-01-24T00:52:08.352Z 1983-01-24T01:18:08.352Z ORB1511 78 15 130 1983-01-26T00:55:41.707Z 1983-01-26T01:11:05.707Z ORB1512 189 15 130 1983-01-26T00:48:39.623Z 1983-01-26T01:27:15.623Z ORB1514 144 15 130 1983-01-28T00:51:25.096Z 1983-01-28T01:24:01.096Z ORB1515 160 15 130 1983-01-30T00:49:36.626Z 1983-01-30T01:22:24.626Z ORB1516 173 15 130 1983-01-30T00:47:24.663Z 1983-01-30T01:22:00.663Z ORB1517 177 15 130 1983-02-01T00:47:13.192Z 1983-02-01T01:23:13.192Z ORB1518 123 15 130 1983-02-01T00:52:50.192Z 1983-02-01T01:17:14.192Z ORB1519 232 15 130 1983-02-03T00:47:39.644Z 1983-02-03T01:33:51.644Z ORB1520 195 15 130 1983-02-03T00:48:53.525Z 1983-02-03T01:27:41.525Z ORB1521 222 15 130 1983-02-05T00:47:07.813Z 1983-02-05T01:31:19.813Z ORB1532 115 15 130 1983-02-15T00:56:16.050Z 1983-02-15T01:19:16.050Z ORB1537 122 15 130 1983-02-21T00:56:28.962Z 1983-02-21T01:20:40.962Z ORB1538 229 15 130 1983-02-21T00:48:33.854Z 1983-02-21T01:35:45.854Z ORB1539 135 15 130 1983-02-23T00:49:02.432Z 1983-02-23T01:20:38.432Z ORB1540 228 15 130 1983-02-23T00:48:30.827Z 1983-02-23T01:35:42.827Z ORB1541 145 15 130 1983-02-25T00:48:59.007Z 1983-02-25T01:20:11.007Z ORB1544 104 15 130 1983-02-27T00:57:09.946Z 1983-02-27T01:17:45.946Z ORB1545 214 15 130 1983-03-01T00:48:49.526Z 1983-03-01T01:34:25.526Z ORB1546 131 15 130 1983-03-01T00:53:28.241Z 1983-03-01T01:21:04.241Z ORB1547 195 15 130 1983-03-03T00:48:54.564Z 1983-03-03T01:32:06.564Z ORB1548 144 15 130 1983-03-03T00:50:44.469Z 1983-03-03T01:20:32.469Z ORB1549 157 15 130 1983-03-05T00:48:57.931Z 1983-03-05T01:20:57.931Z ORB1550 230 15 130 1983-03-05T00:49:22.928Z 1983-03-05T01:36:34.928Z ORB1553 120 15 130 1983-03-09T00:58:46.911Z 1983-03-09T01:30:34.911Z ORB1554 219 15 130 1983-03-09T00:50:46.095Z 1983-03-09T01:36:22.095Z ORB1555 111 15 130 1983-03-11T00:57:08.451Z 1983-03-11T01:19:32.451Z ORB1556 126 15 130 1983-03-11T00:52:18.235Z 1983-03-11T01:18:54.235Z ORB1557 220 15 130 1983-03-13T00:48:51.432Z 1983-03-13T01:35:03.432Z ORB1558 136 15 130 1983-03-13T00:49:36.037Z 1983-03-13T01:18:48.037Z ORB1560 117 15 130 1983-03-15T00:56:51.373Z 1983-03-15T01:20:51.373Z ORB1561 202 15 130 1983-03-17T00:49:58.121Z 1983-03-17T01:35:34.121Z ORB1562 158 15 130 1983-03-17T00:48:52.252Z 1983-03-17T01:26:28.252Z ORB1563 122 15 130 1983-03-19T00:53:21.766Z 1983-03-19T01:18:21.766Z ORB1564 228 15 130 1983-03-19T00:48:14.664Z 1983-03-19T01:34:50.664Z ORB1565 115 15 130 1983-03-21T00:51:31.050Z 1983-03-21T01:15:55.050Z ORB1566 225 15 130 1983-03-21T00:48:10.712Z 1983-03-21T01:35:34.712Z ORB1567 120 15 130 1983-03-23T00:55:25.774Z 1983-03-23T01:19:25.774Z ORB1568 201 15 130 1983-03-23T00:47:40.244Z 1983-03-23T01:33:16.244Z ORB1569 181 15 130 1983-03-25T00:48:30.137Z 1983-03-25T01:33:42.137Z ORB1570 232 15 130 1983-03-25T00:47:19.528Z 1983-03-25T01:33:31.528Z ORB1571 212 15 130 1983-03-27T00:47:08.282Z 1983-03-27T01:34:20.282Z ORB1576 234 15 130 1983-03-31T00:46:28.438Z 1983-03-31T01:33:28.438Z ORB1577 229 15 130 1983-04-02T00:45:50.299Z 1983-04-02T01:31:38.299Z ORB1578 163 15 130 1983-04-02T00:45:35.761Z 1983-04-02T01:21:11.761Z ORB1579 224 15 130 1983-04-04T00:45:20.963Z 1983-04-04T01:32:32.963Z ORB1580 235 15 130 1983-04-04T00:45:17.721Z 1983-04-04T01:32:05.721Z ORB1581 215 15 130 1983-04-06T00:46:26.167Z 1983-04-06T01:32:14.167Z ORB1582 187 15 130 1983-04-06T00:44:34.332Z 1983-04-06T01:30:46.332Z ORB1583 182 15 130 1983-04-08T00:44:42.247Z 1983-04-08T01:23:06.247Z ORB1584 219 15 130 1983-04-08T00:44:13.946Z 1983-04-08T01:30:49.946Z ORB1585 140 15 130 1983-04-10T00:43:46.513Z 1983-04-10T01:22:34.513Z ORB1586 115 15 130 1983-04-10T00:51:53.938Z 1983-04-10T01:15:05.938Z ORB1587 218 15 130 1983-04-12T00:43:13.248Z 1983-04-12T01:27:49.248Z ORB1589 182 15 130 1983-04-14T00:42:39.667Z 1983-04-14T01:19:03.667Z ORB1590 212 15 130 1983-04-14T00:42:34.847Z 1983-04-14T01:25:10.847Z ORB1591 235 15 130 1983-04-16T00:42:06.053Z 1983-04-16T01:28:54.053Z ORB1592 229 15 130 1983-04-16T00:42:13.322Z 1983-04-16T01:27:49.322Z ORB1593 223 15 130 1983-04-18T00:41:32.689Z 1983-04-18T01:26:32.689Z ORB1594 237 15 130 1983-04-18T00:41:11.684Z 1983-04-18T01:28:23.684Z ORB1595 220 15 130 1983-04-20T00:40:54.970Z 1983-04-20T01:25:54.970Z ORB1596 224 15 130 1983-04-20T00:40:38.457Z 1983-04-20T01:27:50.457Z ORB1597 217 15 130 1983-04-22T00:41:10.177Z 1983-04-22T01:24:22.177Z ORB1598 234 15 130 1983-04-22T00:40:06.165Z 1983-04-22T01:27:18.165Z ORB1599 146 15 130 1983-04-24T00:40:02.450Z 1983-04-24T01:26:38.450Z 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.