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 ---------------------------------------------------------------------------- ORB1600 131 15 130 1983-04-24T00:56:11.064Z 1983-04-24T01:26:35.064Z ORB1601 206 15 130 1983-04-25T00:40:08.285Z 1983-04-25T01:21:08.285Z ORB1602 122 15 130 1983-04-26T00:54:05.649Z 1983-04-26T01:24:41.649Z ORB1603 205 15 130 1983-04-28T00:38:51.428Z 1983-04-28T01:19:39.428Z ORB1605 227 15 130 1983-04-29T00:38:48.327Z 1983-04-29T01:25:24.327Z ORB1606 231 15 130 1983-04-30T00:38:11.495Z 1983-04-30T01:24:35.495Z ORB1607 237 15 130 1983-05-02T00:37:59.170Z 1983-05-02T01:25:11.170Z ORB1608 177 15 130 1983-05-02T00:38:23.463Z 1983-05-02T01:19:47.463Z ORB1609 205 15 130 1983-05-04T00:44:24.203Z 1983-05-04T01:25:12.203Z ORB1610 169 15 130 1983-05-04T00:37:25.504Z 1983-05-04T01:11:01.504Z ORB1611 216 15 130 1983-05-05T00:37:15.380Z 1983-05-05T01:23:27.380Z ORB1613 195 15 130 1983-05-07T00:36:56.961Z 1983-05-07T01:15:44.961Z ORB1614 227 15 130 1983-05-08T00:37:48.623Z 1983-05-08T01:23:00.623Z ORB1615 204 15 130 1983-05-09T00:42:16.893Z 1983-05-09T01:22:52.893Z ORB1616 118 15 130 1983-05-10T00:36:57.776Z 1983-05-10T01:13:09.776Z ORB1617 142 15 130 1983-05-11T00:36:51.273Z 1983-05-11T01:07:03.273Z ORB1618 234 15 130 1983-05-12T00:36:33.384Z 1983-05-12T01:23:33.384Z ORB1619 23 15 130 1983-05-14T00:36:40.107Z 1983-05-14T00:41:28.107Z ORB1620 226 15 130 1983-05-14T00:36:35.496Z 1983-05-14T01:23:23.496Z ORB1621 235 15 130 1983-05-15T00:36:31.426Z 1983-05-15T01:23:19.426Z ORB1622 177 15 130 1983-05-16T00:36:15.951Z 1983-05-16T01:11:27.951Z ORB1623 229 15 130 1983-05-17T00:37:01.060Z 1983-05-17T01:23:01.060Z ORB1624 232 15 130 1983-05-18T00:36:58.743Z 1983-05-18T01:23:10.743Z ORB1625 199 15 130 1983-05-19T00:36:32.985Z 1983-05-19T01:17:08.985Z ORB1626 57 15 130 1983-05-20T00:36:19.772Z 1983-05-20T00:47:31.772Z ORB1627 219 15 130 1983-05-21T00:36:19.087Z 1983-05-21T01:19:55.087Z ORB1628 232 15 130 1983-05-22T00:36:55.131Z 1983-05-22T01:23:07.131Z ORB1629 167 15 130 1983-05-23T00:41:31.481Z 1983-05-23T01:14:43.481Z ORB1630 122 15 130 1983-05-24T00:36:44.297Z 1983-05-24T01:09:32.297Z ORB1631 214 15 130 1983-05-25T00:37:33.557Z 1983-05-25T01:20:57.557Z ORB1632 199 15 130 1983-05-26T00:40:11.235Z 1983-05-26T01:22:11.235Z ORB1633 87 15 130 1983-05-27T00:44:49.305Z 1983-05-27T01:02:01.305Z ORB1634 201 15 130 1983-05-28T00:38:27.741Z 1983-05-28T01:18:27.741Z ORB1635 232 15 130 1983-05-29T00:36:54.513Z 1983-05-29T01:23:06.513Z ORB1636 191 15 130 1983-05-30T00:36:32.998Z 1983-05-30T01:14:56.998Z ORB1637 154 15 130 1983-05-31T00:42:12.135Z 1983-05-31T01:14:48.135Z ORB1638 84 15 130 1983-06-01T00:36:51.516Z 1983-06-01T00:53:51.516Z ORB1639 231 15 130 1983-06-03T00:37:07.111Z 1983-06-03T01:23:19.111Z ORB1640 122 15 130 1983-06-03T00:45:22.887Z 1983-06-03T01:09:34.887Z ORB1641 219 15 130 1983-06-04T00:37:26.810Z 1983-06-04T01:21:02.810Z ORB1642 177 15 130 1983-06-05T00:37:42.840Z 1983-06-05T01:16:30.840Z ORB1643 190 15 130 1983-06-06T00:37:34.964Z 1983-06-06T01:15:22.964Z ORB1644 108 15 130 1983-06-07T00:45:15.133Z 1983-06-07T01:09:03.133Z ORB1645 228 15 130 1983-06-08T00:36:55.315Z 1983-06-08T01:22:43.315Z ORB1646 191 15 130 1983-06-09T00:40:47.474Z 1983-06-09T01:21:59.474Z ORB1647 237 15 130 1983-06-10T00:37:03.577Z 1983-06-10T01:24:15.577Z ORB1648 224 15 130 1983-06-11T00:37:19.590Z 1983-06-11T01:23:31.590Z ORB1649 124 15 130 1983-06-12T00:45:23.482Z 1983-06-12T01:09:59.482Z ORB1650 67 15 130 1983-06-13T00:45:39.228Z 1983-06-13T01:09:15.228Z ORB1651 200 15 130 1983-06-14T00:37:18.784Z 1983-06-14T01:18:54.784Z ORB1652 198 15 130 1983-06-15T00:39:10.120Z 1983-06-15T01:24:22.120Z ORB1653 201 15 130 1983-06-16T00:40:25.203Z 1983-06-16T01:22:49.203Z ORB1654 222 15 130 1983-06-17T00:37:28.005Z 1983-06-17T01:21:40.005Z ORB1655 16 15 130 1983-06-19T01:21:30.452Z 1983-06-19T01:24:30.452Z ORB1656 165 15 130 1983-06-19T00:46:20.597Z 1983-06-19T01:19:44.597Z ORB1657 174 15 130 1983-06-20T00:46:10.376Z 1983-06-20T01:24:22.376Z ORB1659 2 15 130 1983-06-23T00:47:36.732Z 1983-06-23T00:48:00.732Z ORB1660 137 15 130 1983-06-23T00:45:37.263Z 1983-06-23T01:20:25.263Z ORB1661 183 15 130 1983-06-24T00:46:37.332Z 1983-06-24T01:23:49.332Z ORB1662 186 15 130 1983-06-25T00:46:24.919Z 1983-06-25T01:24:00.919Z ORB1663 136 15 130 1983-06-26T00:48:00.006Z 1983-06-26T01:18:48.006Z ORB1664 173 15 130 1983-06-27T00:46:10.576Z 1983-06-27T01:24:22.576Z ORB1665 216 15 130 1983-06-28T00:38:44.613Z 1983-06-28T01:21:44.613Z ORB1666 108 15 130 1983-06-29T00:45:42.104Z 1983-06-29T01:07:30.104Z ORB1667 162 15 130 1983-06-30T00:46:51.036Z 1983-06-30T01:23:51.036Z ORB1668 219 15 130 1983-07-01T00:38:34.279Z 1983-07-01T01:23:46.279Z ORB1669 172 15 130 1983-07-02T00:45:30.185Z 1983-07-02T01:22:54.185Z ORB1670 166 15 130 1983-07-03T00:37:37.387Z 1983-07-03T01:17:13.387Z ORB1671 136 15 130 1983-07-04T00:46:44.001Z 1983-07-04T01:19:56.001Z ORB1672 192 15 130 1983-07-05T00:41:02.022Z 1983-07-05T01:23:50.022Z ORB1673 113 15 130 1983-07-06T00:44:55.450Z 1983-07-06T01:07:19.450Z ORB1674 169 15 130 1983-07-07T00:36:48.285Z 1983-07-07T01:18:48.285Z ORB1675 160 15 130 1983-07-08T00:36:40.530Z 1983-07-08T01:16:28.530Z ORB1676 200 15 130 1983-07-09T00:40:44.189Z 1983-07-09T01:21:44.189Z ORB1677 137 15 130 1983-07-10T00:43:47.266Z 1983-07-10T01:16:23.266Z ORB1678 219 15 130 1983-07-11T00:37:13.770Z 1983-07-11T01:22:25.770Z ORB1679 190 15 130 1983-07-13T00:40:03.710Z 1983-07-13T01:17:51.710Z ORB1680 119 15 130 1983-07-13T00:44:17.096Z 1983-07-13T01:07:53.096Z ORB1681 1 15 130 1983-07-15T00:57:29.943Z 1983-07-15T00:57:29.943Z ORB1682 6 15 130 1983-07-15T00:40:06.263Z 1983-07-15T00:58:30.263Z ORB1683 40 15 130 1983-07-17T00:50:30.073Z 1983-07-17T00:58:18.073Z ORB1685 1 15 130 1983-07-19T00:35:39.904Z 1983-07-19T00:35:39.904Z ORB1691 2 15 130 1983-07-25T00:53:47.150Z 1983-07-25T01:04:35.150Z ORB1692 1 15 130 1983-07-25T00:44:43.148Z 1983-07-25T00:44:43.148Z ORB1694 103 15 130 1983-07-27T00:40:46.342Z 1983-07-27T01:01:10.342Z ORB1695 50 15 130 1983-07-29T00:48:29.596Z 1983-07-29T01:02:05.596Z ORB1696 8 15 130 1983-07-29T00:54:12.602Z 1983-07-29T01:04:00.602Z ORB1697 80 15 130 1983-07-31T00:37:55.522Z 1983-07-31T01:07:07.522Z ORB1698 41 15 130 1983-07-31T00:50:38.317Z 1983-07-31T00:59:14.317Z ORB1699 62 15 130 1983-08-02T00:53:21.018Z 1983-08-02T01:06:09.018Z 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.