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 ---------------------------------------------------------------------------- ORB1700 96 15 130 1983-08-02T00:47:39.657Z 1983-08-02T01:15:39.657Z ORB1701 53 15 130 1983-08-04T00:49:22.265Z 1983-08-04T00:59:46.265Z ORB1702 43 15 130 1983-08-04T00:34:40.876Z 1983-08-04T01:02:40.876Z ORB1703 98 15 130 1983-08-06T00:35:35.521Z 1983-08-06T00:55:11.521Z ORB1704 67 15 130 1983-08-06T00:43:30.169Z 1983-08-06T01:03:54.169Z ORB1705 60 15 130 1983-08-08T00:33:24.977Z 1983-08-08T01:05:24.977Z ORB1706 60 15 130 1983-08-08T00:51:19.915Z 1983-08-08T01:03:07.915Z ORB1707 50 15 130 1983-08-10T00:47:15.014Z 1983-08-10T00:57:03.014Z ORB1708 106 15 130 1983-08-10T00:37:10.304Z 1983-08-10T01:03:46.304Z ORB1709 2 15 130 1983-08-12T00:48:29.815Z 1983-08-12T00:51:53.815Z ORB1710 10 15 130 1983-08-12T00:35:49.577Z 1983-08-12T00:49:25.577Z ORB1711 92 15 130 1983-08-14T00:37:21.618Z 1983-08-14T00:55:33.618Z ORB1712 26 15 130 1983-08-14T00:47:05.967Z 1983-08-14T00:52:05.967Z ORB1713 29 15 130 1983-08-16T00:48:38.650Z 1983-08-16T00:54:14.650Z ORB1715 9 15 130 1983-08-18T00:46:09.121Z 1983-08-18T00:47:57.121Z ORB1716 101 15 130 1983-08-18T00:46:42.958Z 1983-08-18T01:12:18.958Z ORB1717 147 15 130 1983-08-20T00:27:14.981Z 1983-08-20T00:59:50.981Z ORB1718 1 15 130 1983-08-20T00:28:00.772Z 1983-08-20T00:28:00.772Z ORB1719 7 15 130 1983-08-22T00:39:23.035Z 1983-08-22T00:58:23.035Z ORB1720 112 15 130 1983-08-22T00:45:45.789Z 1983-08-22T01:11:57.789Z ORB1721 82 15 130 1983-08-24T00:48:09.052Z 1983-08-24T01:08:57.052Z ORB1722 141 15 130 1983-08-24T00:27:08.839Z 1983-08-24T01:10:20.839Z ORB1723 199 15 130 1983-08-26T00:29:57.164Z 1983-08-26T01:09:33.164Z ORB1724 96 15 130 1983-08-26T00:29:46.040Z 1983-08-26T01:06:58.040Z ORB1725 115 15 130 1983-08-28T00:34:35.478Z 1983-08-28T00:57:23.478Z ORB1726 167 15 130 1983-08-28T00:24:49.486Z 1983-08-28T01:04:37.486Z ORB1727 216 15 130 1983-08-30T00:25:28.073Z 1983-08-30T01:08:28.073Z ORB1728 144 15 130 1983-08-30T00:34:19.243Z 1983-08-30T01:04:19.243Z ORB1729 1 15 130 1983-09-01T00:42:35.003Z 1983-09-01T00:42:35.003Z ORB1730 181 15 130 1983-09-01T00:32:51.352Z 1983-09-01T01:09:15.352Z ORB1731 23 15 130 1983-09-03T00:27:44.294Z 1983-09-03T00:58:08.294Z ORB1732 135 15 130 1983-09-03T00:40:25.826Z 1983-09-03T01:07:13.826Z ORB1733 179 15 130 1983-09-05T00:23:55.944Z 1983-09-05T01:00:43.944Z ORB1734 76 15 130 1983-09-05T00:29:50.782Z 1983-09-05T00:46:38.782Z ORB1735 224 15 130 1983-09-07T00:23:58.072Z 1983-09-07T01:08:34.072Z ORB1736 59 15 130 1983-09-07T00:32:53.930Z 1983-09-07T00:56:29.930Z ORB1737 227 15 130 1983-09-09T00:23:38.345Z 1983-09-09T01:09:02.345Z ORB1738 219 15 130 1983-09-09T00:23:47.308Z 1983-09-09T01:07:23.308Z ORB1739 176 15 130 1983-09-11T00:29:44.803Z 1983-09-11T01:04:44.803Z ORB1740 142 15 130 1983-09-11T00:27:04.630Z 1983-09-11T00:55:16.630Z ORB1741 173 15 130 1983-09-13T00:23:26.430Z 1983-09-13T00:57:50.430Z ORB1742 213 15 130 1983-09-13T00:26:24.714Z 1983-09-13T01:08:48.714Z ORB1743 130 15 130 1983-09-15T00:36:47.463Z 1983-09-15T01:02:35.463Z ORB1744 163 15 130 1983-09-15T00:23:10.654Z 1983-09-15T00:56:10.654Z ORB1745 200 15 130 1983-09-17T00:23:10.267Z 1983-09-17T01:02:58.267Z ORB1746 202 15 130 1983-09-17T00:23:34.277Z 1983-09-17T01:03:46.277Z ORB1747 150 15 130 1983-09-19T00:25:10.752Z 1983-09-19T01:03:22.752Z ORB1748 216 15 130 1983-09-19T00:23:11.505Z 1983-09-19T01:06:11.505Z ORB1749 181 15 130 1983-09-21T00:23:48.577Z 1983-09-21T00:59:48.577Z ORB1750 158 15 130 1983-09-21T00:37:01.939Z 1983-09-21T01:08:25.939Z ORB1751 210 15 130 1983-09-23T00:23:15.563Z 1983-09-23T01:07:15.563Z ORB1752 152 15 130 1983-09-23T00:23:41.419Z 1983-09-23T00:53:53.419Z ORB1753 188 15 130 1983-09-25T00:23:31.549Z 1983-09-25T01:00:55.549Z ORB1754 112 15 130 1983-09-25T00:29:09.795Z 1983-09-25T00:51:21.795Z ORB1755 216 15 130 1983-09-27T00:23:36.166Z 1983-09-27T01:06:36.166Z ORB1756 202 15 130 1983-09-27T00:23:50.654Z 1983-09-27T01:04:02.654Z ORB1757 140 15 130 1983-09-29T00:37:53.234Z 1983-09-29T01:05:41.234Z ORB1758 153 15 130 1983-09-29T00:29:07.874Z 1983-09-29T00:59:31.874Z ORB1759 160 15 130 1983-10-01T00:24:10.543Z 1983-10-01T00:55:58.543Z ORB1760 179 15 130 1983-10-01T00:24:25.208Z 1983-10-01T01:00:01.208Z ORB1761 115 15 130 1983-10-03T00:23:39.881Z 1983-10-03T00:49:51.881Z ORB1762 181 15 130 1983-10-03T00:28:30.429Z 1983-10-03T01:04:30.429Z ORB1763 25 15 130 1983-10-05T00:37:20.848Z 1983-10-05T01:10:08.848Z ORB1765 163 15 130 1983-10-07T00:23:49.168Z 1983-10-07T00:56:25.168Z ORB1766 162 15 130 1983-10-07T00:25:51.003Z 1983-10-07T00:58:03.003Z ORB1767 137 15 130 1983-10-09T00:23:52.581Z 1983-10-09T01:07:16.581Z ORB1768 196 15 130 1983-10-09T00:24:17.870Z 1983-10-09T01:03:17.870Z ORB1769 208 15 130 1983-10-11T00:23:54.787Z 1983-10-11T01:05:18.787Z ORB1770 192 15 130 1983-10-11T00:24:31.379Z 1983-10-11T01:02:43.379Z ORB1771 16 15 130 1983-10-13T00:37:19.596Z 1983-10-13T00:40:19.596Z ORB1772 228 15 130 1983-10-13T00:23:55.411Z 1983-10-13T01:09:19.411Z ORB1773 156 15 130 1983-10-15T00:24:06.800Z 1983-10-15T00:55:06.800Z ORB1774 181 15 130 1983-10-15T00:24:17.737Z 1983-10-15T01:00:17.737Z ORB1775 195 15 130 1983-10-17T00:23:52.117Z 1983-10-17T01:02:40.117Z ORB1776 200 15 130 1983-10-17T00:25:26.065Z 1983-10-17T01:05:14.065Z ORB1777 203 15 130 1983-10-19T00:25:11.498Z 1983-10-19T01:05:59.498Z ORB1778 164 15 130 1983-10-19T00:37:08.398Z 1983-10-19T01:09:44.398Z ORB1779 176 15 130 1983-10-21T00:23:40.747Z 1983-10-21T01:00:40.747Z ORB1780 182 15 130 1983-10-21T00:27:48.532Z 1983-10-21T01:04:36.532Z ORB1781 163 15 130 1983-10-23T00:24:19.738Z 1983-10-23T00:57:07.738Z ORB1782 123 15 130 1983-10-23T00:32:02.355Z 1983-10-23T00:56:50.355Z ORB1783 155 15 130 1983-10-25T00:23:20.219Z 1983-10-25T00:54:32.219Z ORB1784 156 15 130 1983-10-25T00:23:13.594Z 1983-10-25T00:54:13.594Z ORB1785 116 15 130 1983-10-27T00:31:30.357Z 1983-10-27T00:54:42.357Z ORB1786 161 15 130 1983-10-27T00:23:22.504Z 1983-10-27T00:56:22.504Z ORB1787 193 15 130 1983-10-29T00:24:14.034Z 1983-10-29T01:02:50.034Z ORB1788 206 15 130 1983-10-29T00:23:04.946Z 1983-10-29T01:04:16.946Z ORB1789 136 15 130 1983-10-31T00:27:19.244Z 1983-10-31T00:54:31.244Z ORB1790 161 15 130 1983-10-31T00:25:32.867Z 1983-10-31T00:58:20.867Z ORB1791 218 15 130 1983-11-02T00:24:45.929Z 1983-11-02T01:08:21.929Z ORB1792 107 15 130 1983-11-02T00:30:58.396Z 1983-11-02T00:52:22.396Z ORB1793 215 15 130 1983-11-04T00:21:46.276Z 1983-11-04T01:05:22.276Z ORB1794 218 15 130 1983-11-04T00:21:33.581Z 1983-11-04T01:04:57.581Z ORB1795 226 15 130 1983-11-06T00:21:44.283Z 1983-11-06T01:06:44.283Z ORB1796 77 15 130 1983-11-06T00:29:18.464Z 1983-11-06T00:44:30.464Z ORB1797 197 15 130 1983-11-08T00:21:04.118Z 1983-11-08T01:00:16.118Z ORB1798 225 15 130 1983-11-08T00:20:49.264Z 1983-11-08T01:05:37.264Z ORB1799 102 15 130 1983-11-10T00:27:57.921Z 1983-11-10T00:48:09.921Z 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.