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 ---------------------------------------------------------------------------- ORB2649 43 15 130 1986-03-07T23:09:38.173Z 1986-03-07T23:38:26.173Z ORB2650 66 15 130 1986-03-08T23:07:49.655Z 1986-03-08T23:20:49.655Z ORB2651 100 15 130 1986-03-09T22:59:12.707Z 1986-03-09T23:35:12.707Z ORB2656 9 15 130 1986-03-14T22:58:01.090Z 1986-03-14T22:59:37.090Z ORB2657 59 15 130 1986-03-15T23:00:39.759Z 1986-03-15T23:12:15.759Z ORB2658 68 15 130 1986-03-16T22:58:18.422Z 1986-03-16T23:12:06.422Z ORB2659 27 15 130 1986-03-17T23:07:44.775Z 1986-03-17T23:13:08.775Z ORB2660 138 15 130 1986-03-18T22:58:47.338Z 1986-03-18T23:33:11.338Z ORB2661 61 15 130 1986-03-19T23:02:01.793Z 1986-03-19T23:14:01.793Z ORB2662 42 15 130 1986-03-20T23:13:52.103Z 1986-03-20T23:23:04.103Z ORB2663 103 15 130 1986-03-21T23:20:30.236Z 1986-03-21T23:44:06.236Z ORB2664 81 15 130 1986-03-22T23:15:56.157Z 1986-03-22T23:34:08.157Z ORB2665 76 15 130 1986-03-23T23:15:33.836Z 1986-03-23T23:33:09.836Z ORB2666 56 15 130 1986-03-24T23:16:10.776Z 1986-03-24T23:27:10.776Z ORB2667 86 15 130 1986-03-25T23:10:35.819Z 1986-03-25T23:33:59.819Z ORB2668 45 15 130 1986-03-26T23:16:12.530Z 1986-03-26T23:25:00.530Z ORB2669 51 15 130 1986-03-27T23:16:36.879Z 1986-03-27T23:26:36.879Z ORB2670 144 15 130 1986-03-28T23:08:48.839Z 1986-03-28T23:41:00.839Z ORB2671 52 15 130 1986-03-29T23:14:24.385Z 1986-03-29T23:28:12.385Z ORB2672 91 15 130 1986-03-30T23:08:59.491Z 1986-03-30T23:27:23.491Z ORB2673 51 15 130 1986-03-31T23:17:10.198Z 1986-03-31T23:27:10.198Z ORB2675 76 15 130 1986-04-02T23:09:42.118Z 1986-04-02T23:34:18.118Z ORB2676 30 15 130 1986-04-03T23:17:27.299Z 1986-04-03T23:23:15.299Z ORB2677 83 15 130 1986-04-04T23:15:59.937Z 1986-04-04T23:37:35.937Z ORB2678 94 15 130 1986-04-05T23:19:44.016Z 1986-04-05T23:42:32.016Z ORB2679 80 15 130 1986-04-06T23:10:15.523Z 1986-04-06T23:26:27.523Z ORB2681 115 15 130 1986-04-08T23:18:31.357Z 1986-04-08T23:45:07.357Z ORB2682 49 15 130 1986-04-09T23:18:25.764Z 1986-04-09T23:28:01.764Z ORB2683 45 15 130 1986-04-10T23:19:07.560Z 1986-04-10T23:28:55.560Z ORB2684 138 15 130 1986-04-11T23:03:48.740Z 1986-04-11T23:38:48.740Z ORB2685 57 15 130 1986-04-12T23:06:53.302Z 1986-04-12T23:29:41.302Z ORB2686 100 15 130 1986-04-13T23:10:09.244Z 1986-04-13T23:30:21.244Z ORB2688 134 15 130 1986-04-15T23:15:27.301Z 1986-04-15T23:48:15.301Z ORB2690 62 15 130 1986-04-17T23:11:54.870Z 1986-04-17T23:26:18.870Z ORB2691 61 15 130 1986-04-18T23:13:55.759Z 1986-04-18T23:26:19.759Z ORB2692 44 15 130 1986-04-19T23:18:56.064Z 1986-04-19T23:27:32.064Z ORB2693 178 15 130 1986-04-20T23:03:07.799Z 1986-04-20T23:42:43.799Z ORB2694 45 15 130 1986-04-21T23:18:54.863Z 1986-04-21T23:27:42.863Z ORB2695 132 15 130 1986-04-22T23:11:05.441Z 1986-04-22T23:42:05.441Z ORB2696 37 15 130 1986-04-23T23:17:39.498Z 1986-04-23T23:25:27.498Z ORB2697 44 15 130 1986-04-24T23:19:49.054Z 1986-04-24T23:28:25.054Z ORB2698 35 15 130 1986-04-25T23:09:34.131Z 1986-04-25T23:25:34.131Z ORB2699 33 15 130 1986-04-26T23:18:54.751Z 1986-04-26T23:28:54.751Z 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.