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 ---------------------------------------------------------------------------- ORB2700 154 15 130 1986-04-27T23:03:26.941Z 1986-04-27T23:36:38.941Z ORB2701 95 15 130 1986-04-28T23:08:58.724Z 1986-04-28T23:29:46.724Z ORB2702 188 15 130 1986-04-29T23:03:42.130Z 1986-04-29T23:43:06.130Z ORB2703 80 15 130 1986-04-30T23:08:01.187Z 1986-04-30T23:24:13.187Z ORB2704 7 15 130 1986-05-01T23:18:43.924Z 1986-05-01T23:23:43.924Z ORB2705 191 15 130 1986-05-02T23:03:02.372Z 1986-05-02T23:43:50.372Z ORB2707 193 15 130 1986-05-04T23:02:26.532Z 1986-05-04T23:43:50.532Z ORB2708 33 15 130 1986-05-05T23:11:37.081Z 1986-05-05T23:22:37.081Z ORB2709 182 15 130 1986-05-06T23:02:19.507Z 1986-05-06T23:42:07.507Z ORB2710 44 15 130 1986-05-07T23:17:25.811Z 1986-05-07T23:42:13.811Z ORB2711 58 15 130 1986-05-08T23:17:32.029Z 1986-05-08T23:28:56.029Z ORB2712 170 15 130 1986-05-09T23:02:02.195Z 1986-05-09T23:38:38.195Z ORB2713 49 15 130 1986-05-10T23:05:32.345Z 1986-05-10T23:26:20.345Z ORB2714 152 15 130 1986-05-11T23:01:38.515Z 1986-05-11T23:36:26.515Z ORB2715 3 15 130 1986-05-12T23:17:33.076Z 1986-05-12T23:18:33.076Z ORB2722 29 15 130 1986-05-19T23:18:57.374Z 1986-05-19T23:24:33.374Z ORB2724 36 15 130 1986-05-21T23:17:25.595Z 1986-05-21T23:26:49.595Z ORB2725 5 15 130 1986-05-22T23:18:58.266Z 1986-05-22T23:23:22.265Z ORB2726 178 15 130 1986-05-23T23:01:07.346Z 1986-05-23T23:39:43.346Z ORB2727 28 15 130 1986-05-24T23:16:16.862Z 1986-05-24T23:21:40.862Z ORB2728 181 15 130 1986-05-25T23:00:38.840Z 1986-05-25T23:38:02.840Z ORB2729 40 15 130 1986-05-26T23:17:01.327Z 1986-05-26T23:26:01.327Z ORB2730 148 15 130 1986-05-27T23:01:00.291Z 1986-05-27T23:37:00.291Z ORB2731 36 15 130 1986-05-28T23:16:23.781Z 1986-05-28T23:23:23.781Z ORB2732 28 15 130 1986-05-29T23:17:59.815Z 1986-05-29T23:23:23.815Z ORB2733 151 15 130 1986-05-30T23:01:00.408Z 1986-05-30T23:33:36.408Z ORB2734 37 15 130 1986-05-31T23:19:01.577Z 1986-05-31T23:26:13.577Z ORB2735 207 15 130 1986-06-01T23:01:03.333Z 1986-06-01T23:44:51.333Z ORB2736 17 15 130 1986-06-02T23:16:17.671Z 1986-06-02T23:25:05.671Z ORB2737 195 15 130 1986-06-03T23:01:44.630Z 1986-06-03T23:43:20.630Z ORB2738 34 15 130 1986-06-04T23:16:12.202Z 1986-06-04T23:23:36.202Z ORB2739 1 15 130 1986-06-05T23:30:40.393Z 1986-06-05T23:30:40.393Z ORB2740 185 15 130 1986-06-06T23:01:21.204Z 1986-06-06T23:45:21.204Z ORB2742 222 15 130 1986-06-08T23:01:56.683Z 1986-06-08T23:46:08.683Z ORB2744 156 15 130 1986-06-10T23:01:22.446Z 1986-06-10T23:32:22.446Z ORB2747 198 15 130 1986-06-13T23:02:35.752Z 1986-06-13T23:41:59.752Z ORB2749 161 15 130 1986-06-15T23:03:31.476Z 1986-06-15T23:45:43.476Z ORB2750 2 15 130 1986-06-16T23:45:06.149Z 1986-06-16T23:45:18.149Z ORB2753 6 15 130 1986-06-19T23:23:05.187Z 1986-06-19T23:24:29.187Z ORB2754 1 15 130 1986-06-20T23:36:05.800Z 1986-06-20T23:36:05.800Z ORB2755 20 15 130 1986-06-21T23:16:06.840Z 1986-06-21T23:21:54.840Z ORB2761 16 15 130 1986-06-27T23:12:44.505Z 1986-06-27T23:24:20.505Z ORB2762 1 15 130 1986-06-28T23:25:47.741Z 1986-06-28T23:25:47.741Z ORB2763 2 15 130 1986-06-29T23:27:51.166Z 1986-06-29T23:28:03.166Z ORB2764 3 15 130 1986-06-30T23:26:57.157Z 1986-06-30T23:48:57.157Z ORB2766 13 15 130 1986-07-02T23:09:42.788Z 1986-07-02T23:36:30.788Z ORB2768 22 15 130 1986-07-04T23:17:28.634Z 1986-07-04T23:23:40.634Z ORB2769 39 15 130 1986-07-05T23:08:45.552Z 1986-07-05T23:51:09.552Z ORB2770 18 15 130 1986-07-06T23:43:02.421Z 1986-07-06T23:46:50.421Z ORB2772 66 15 130 1986-07-08T23:24:48.077Z 1986-07-08T23:43:36.077Z ORB2773 6 15 130 1986-07-09T23:08:52.622Z 1986-07-09T23:12:28.622Z ORB2774 1 15 130 1986-07-10T23:20:20.983Z 1986-07-10T23:20:20.983Z ORB2775 24 15 130 1986-07-11T23:09:49.131Z 1986-07-11T23:52:37.131Z ORB2776 6 15 130 1986-07-12T23:10:53.032Z 1986-07-12T23:49:53.032Z ORB2777 15 15 130 1986-07-13T23:11:44.658Z 1986-07-13T23:35:44.658Z ORB2778 36 15 130 1986-07-14T23:09:47.978Z 1986-07-14T23:54:11.978Z ORB2779 149 15 130 1986-07-15T23:10:14.964Z 1986-07-15T23:54:26.964Z ORB2780 32 15 130 1986-07-16T23:10:53.589Z 1986-07-16T23:52:41.589Z ORB2786 107 15 130 1986-07-22T23:12:17.956Z 1986-07-22T23:55:05.956Z ORB2787 5 15 130 1986-07-23T23:24:06.760Z 1986-07-23T23:25:30.760Z ORB2788 3 15 130 1986-07-24T23:24:07.033Z 1986-07-24T23:24:31.033Z ORB2789 180 15 130 1986-07-25T23:13:06.761Z 1986-07-25T23:54:30.761Z ORB2790 63 15 130 1986-07-26T23:15:53.932Z 1986-07-26T23:53:53.932Z ORB2791 144 15 130 1986-07-27T23:16:16.536Z 1986-07-27T23:57:28.536Z ORB2793 189 15 130 1986-07-29T23:14:24.006Z 1986-07-29T23:55:48.006Z ORB2794 38 15 130 1986-07-30T23:15:56.861Z 1986-07-30T23:56:08.861Z 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.