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 ---------------------------------------------------------------------------- ORB1400 52 15 130 1982-10-06T01:06:55.142Z 1982-10-06T01:19:07.142Z ORB1401 1 15 130 1982-10-07T00:58:06.727Z 1982-10-07T00:58:06.727Z ORB1402 236 15 130 1982-10-08T00:57:30.844Z 1982-10-08T01:45:06.844Z ORB1403 154 15 130 1982-10-09T00:57:31.473Z 1982-10-09T01:32:43.473Z ORB1404 173 15 130 1982-10-10T00:57:56.596Z 1982-10-10T01:34:08.596Z ORB1405 182 15 130 1982-10-11T00:57:34.191Z 1982-10-11T01:37:34.191Z ORB1406 156 15 130 1982-10-12T01:10:00.235Z 1982-10-12T01:42:48.235Z ORB1407 120 15 130 1982-10-13T01:06:38.704Z 1982-10-13T01:31:02.704Z ORB1408 141 15 130 1982-10-14T01:10:29.573Z 1982-10-14T01:40:17.573Z ORB1409 165 15 130 1982-10-15T01:02:08.814Z 1982-10-15T01:37:08.814Z ORB1410 224 15 130 1982-10-16T00:57:48.400Z 1982-10-16T01:45:12.400Z ORB1412 166 15 130 1982-10-18T00:59:56.489Z 1982-10-18T01:36:56.489Z ORB1413 97 15 130 1982-10-19T01:12:12.931Z 1982-10-19T01:35:12.931Z ORB1446 33 15 130 1982-11-22T01:15:58.550Z 1982-11-22T01:30:34.550Z ORB1447 148 15 130 1982-11-22T00:59:41.901Z 1982-11-22T01:39:17.901Z ORB1448 36 15 130 1982-11-24T01:13:24.661Z 1982-11-24T01:34:48.661Z ORB1450 119 15 130 1982-11-26T01:00:12.405Z 1982-11-26T01:40:00.405Z ORB1451 153 15 130 1982-11-26T01:05:41.396Z 1982-11-26T01:41:05.396Z ORB1452 124 15 130 1982-11-27T01:02:45.805Z 1982-11-27T01:28:33.805Z ORB1454 217 15 130 1982-11-29T00:59:04.908Z 1982-11-29T01:42:28.908Z ORB1455 69 15 130 1982-11-30T01:17:07.620Z 1982-11-30T01:30:43.620Z ORB1456 92 15 130 1982-12-02T01:08:45.788Z 1982-12-02T01:30:33.788Z ORB1458 62 15 130 1982-12-04T01:08:12.550Z 1982-12-04T01:43:12.550Z ORB1459 161 15 130 1982-12-04T01:13:25.176Z 1982-12-04T01:45:25.176Z ORB1460 240 15 130 1982-12-06T00:57:25.322Z 1982-12-06T01:45:13.322Z ORB1461 160 15 130 1982-12-06T00:57:25.009Z 1982-12-06T01:31:01.009Z ORB1462 96 15 130 1982-12-07T00:59:48.258Z 1982-12-07T01:19:00.258Z ORB1463 122 15 130 1982-12-08T01:05:35.091Z 1982-12-08T01:29:47.091Z ORB1464 139 15 130 1982-12-10T01:05:09.532Z 1982-12-10T01:35:21.532Z ORB1466 88 15 130 1982-12-12T01:05:29.339Z 1982-12-12T01:24:17.339Z ORB1467 122 15 130 1982-12-12T01:04:02.757Z 1982-12-12T01:28:14.757Z ORB1468 102 15 130 1982-12-14T01:05:59.889Z 1982-12-14T01:26:11.889Z ORB1469 1 15 130 1982-12-14T01:12:58.344Z 1982-12-14T01:12:58.344Z ORB1470 101 15 130 1982-12-16T01:04:43.327Z 1982-12-16T01:27:19.327Z ORB1471 112 15 130 1982-12-16T01:03:28.111Z 1982-12-16T01:26:16.111Z ORB1473 55 15 130 1982-12-18T01:08:21.207Z 1982-12-18T01:23:57.207Z ORB1474 5 15 130 1982-12-20T01:08:17.581Z 1982-12-20T01:16:53.581Z ORB1475 115 15 130 1982-12-20T01:01:49.882Z 1982-12-20T01:24:37.882Z ORB1476 110 15 130 1982-12-22T01:02:22.142Z 1982-12-22T01:24:10.142Z ORB1477 98 15 130 1982-12-22T01:02:18.391Z 1982-12-22T01:23:06.391Z ORB1479 113 15 130 1982-12-24T01:01:34.991Z 1982-12-24T01:25:58.991Z ORB1481 110 15 130 1982-12-26T00:53:15.937Z 1982-12-26T01:15:03.937Z ORB1482 1 15 130 1982-12-28T01:05:36.619Z 1982-12-28T01:05:36.619Z ORB1483 1 15 130 1982-12-28T00:55:09.481Z 1982-12-28T00:55:09.481Z ORB1484 44 15 130 1982-12-30T01:00:42.553Z 1982-12-30T01:09:18.553Z ORB1485 125 15 130 1982-12-30T01:00:03.866Z 1982-12-30T01:30:39.866Z ORB1486 121 15 130 1983-01-01T00:59:25.447Z 1983-01-01T01:23:37.447Z ORB1488 2 15 130 1983-01-02T01:01:28.972Z 1983-01-02T01:15:04.972Z ORB1489 165 15 130 1983-01-04T00:58:02.718Z 1983-01-04T01:32:02.718Z ORB1492 1 15 130 1983-01-06T01:35:22.308Z 1983-01-06T01:35:22.308Z ORB1493 219 15 130 1983-01-08T00:53:21.698Z 1983-01-08T01:36:57.698Z ORB1494 111 15 130 1983-01-08T00:58:09.554Z 1983-01-08T01:20:09.554Z ORB1495 124 15 130 1983-01-10T00:57:09.894Z 1983-01-10T01:23:33.894Z ORB1496 104 15 130 1983-01-10T00:51:46.392Z 1983-01-10T01:12:58.392Z ORB1497 58 15 130 1983-01-12T00:59:23.695Z 1983-01-12T01:10:59.695Z ORB1498 123 15 130 1983-01-12T01:03:25.530Z 1983-01-12T01:27:49.530Z ORB1499 9 15 130 1983-01-14T00:48:51.912Z 1983-01-14T01:34:51.912Z 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.