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 ---------------------------------------------------------------------------- ORB0700 32 15 130 1980-11-04T19:31:01.456Z 1980-11-04T19:46:25.456Z ORB0701 73 15 130 1980-11-05T19:46:21.792Z 1980-11-05T20:00:57.792Z ORB0702 138 15 130 1980-11-06T19:35:54.440Z 1980-11-06T20:05:18.440Z ORB0703 70 15 130 1980-11-07T19:57:03.488Z 1980-11-07T20:11:15.488Z ORB0704 152 15 130 1980-11-08T19:41:48.896Z 1980-11-08T20:13:24.896Z ORB0705 42 15 130 1980-11-09T20:07:58.728Z 1980-11-09T20:16:22.728Z ORB0706 144 15 130 1980-11-10T19:45:32.928Z 1980-11-10T20:15:20.928Z ORB0707 3 15 130 1980-11-11T19:48:55.656Z 1980-11-11T19:55:43.656Z ORB0710 49 15 130 1980-11-14T20:01:30.824Z 1980-11-14T20:44:18.824Z ORB0711 108 15 130 1980-11-15T20:03:07.568Z 1980-11-15T20:34:55.568Z ORB0712 83 15 130 1980-11-16T20:09:56.928Z 1980-11-16T20:34:44.928Z ORB0713 75 15 130 1980-11-17T20:19:34.832Z 1980-11-17T20:35:22.832Z ORB0714 83 15 130 1980-11-18T20:06:13.240Z 1980-11-18T20:39:01.240Z ORB0715 56 15 130 1980-11-19T20:30:52.128Z 1980-11-19T20:44:40.128Z ORB0716 69 15 130 1980-11-20T20:31:20.048Z 1980-11-20T20:46:20.048Z ORB0719 50 15 130 1980-11-23T20:36:22.792Z 1980-11-23T20:56:46.792Z ORB0720 106 15 130 1980-11-24T20:38:40.928Z 1980-11-24T21:00:04.928Z ORB0721 99 15 130 1980-11-25T20:41:11.744Z 1980-11-25T21:04:59.744Z ORB0722 112 15 130 1980-11-26T20:27:43.016Z 1980-11-26T21:04:19.016Z ORB0723 68 15 130 1980-11-27T20:47:14.928Z 1980-11-27T21:01:26.928Z ORB0724 67 15 130 1980-11-28T20:50:23.456Z 1980-11-28T21:03:35.456Z ORB0725 63 15 130 1980-11-29T20:52:44.536Z 1980-11-29T21:12:20.536Z ORB0727 105 15 130 1980-12-01T20:57:04.408Z 1980-12-01T21:19:04.408Z ORB0728 156 15 130 1980-12-02T20:45:15.184Z 1980-12-02T21:23:03.184Z ORB0729 79 15 130 1980-12-03T21:06:50.480Z 1980-12-03T21:26:02.480Z ORB0730 21 15 130 1980-12-04T21:15:38.152Z 1980-12-04T21:25:50.152Z ORB0731 87 15 130 1980-12-05T21:11:26.368Z 1980-12-05T21:31:50.368Z ORB0732 96 15 130 1980-12-06T20:56:39.008Z 1980-12-06T21:31:51.008Z ORB0733 87 15 130 1980-12-07T21:13:40.216Z 1980-12-07T21:39:28.216Z ORB0734 95 15 130 1980-12-08T21:20:29.680Z 1980-12-08T21:40:17.680Z ORB0736 77 15 130 1980-12-10T21:24:09.760Z 1980-12-10T21:42:21.760Z ORB0737 77 15 130 1980-12-11T21:24:48.304Z 1980-12-11T21:44:00.304Z ORB0738 107 15 130 1980-12-12T21:26:15.136Z 1980-12-12T21:49:27.136Z ORB0739 17 15 130 1980-12-13T21:34:06.232Z 1980-12-13T21:53:18.232Z ORB0740 66 15 130 1980-12-14T21:32:21.560Z 1980-12-14T21:55:09.560Z ORB0741 99 15 130 1980-12-15T21:39:25.088Z 1980-12-15T22:00:37.088Z ORB0742 166 15 130 1980-12-16T21:24:04.784Z 1980-12-16T22:00:28.784Z ORB0743 84 15 130 1980-12-17T21:42:32.608Z 1980-12-17T22:03:44.608Z ORB0744 172 15 130 1980-12-18T21:29:36.536Z 1980-12-18T22:06:24.536Z ORB0745 118 15 130 1980-12-19T21:43:40.520Z 1980-12-19T22:11:28.520Z ORB0746 114 15 130 1980-12-20T21:49:20.544Z 1980-12-20T22:12:44.544Z ORB0747 131 15 130 1980-12-21T21:38:36.560Z 1980-12-21T22:14:48.560Z ORB0748 168 15 130 1980-12-22T21:41:04.536Z 1980-12-22T22:18:16.536Z ORB0749 101 15 130 1980-12-23T21:59:44.440Z 1980-12-23T22:22:20.440Z ORB0750 172 15 130 1980-12-24T21:50:00.232Z 1980-12-24T22:26:36.232Z ORB0751 109 15 130 1980-12-25T22:03:51.888Z 1980-12-25T22:27:03.888Z ORB0752 95 15 130 1980-12-26T22:10:07.376Z 1980-12-26T22:30:55.376Z ORB0753 177 15 130 1980-12-27T21:59:22.656Z 1980-12-27T22:35:46.656Z ORB0754 97 15 130 1980-12-28T22:09:37.704Z 1980-12-28T22:38:01.704Z ORB0755 53 15 130 1980-12-29T22:18:04.480Z 1980-12-29T22:36:40.480Z ORB0756 33 15 130 1980-12-30T22:04:26.912Z 1980-12-30T22:40:38.912Z ORB0757 211 15 130 1980-12-31T22:07:28.848Z 1980-12-31T22:50:04.848Z ORB0758 152 15 130 1981-01-01T22:24:42.464Z 1981-01-01T22:56:18.464Z ORB0759 135 15 130 1981-01-02T22:28:55.696Z 1981-01-02T22:56:31.696Z ORB0760 223 15 130 1981-01-03T22:15:56.496Z 1981-01-03T23:03:20.496Z ORB0761 51 15 130 1981-01-04T22:34:20.864Z 1981-01-04T22:52:44.864Z ORB0762 94 15 130 1981-01-05T22:37:44.824Z 1981-01-05T22:56:44.824Z ORB0763 87 15 130 1981-01-06T22:41:08.600Z 1981-01-06T23:00:08.600Z ORB0764 86 15 130 1981-01-07T22:41:31.520Z 1981-01-07T22:59:07.520Z ORB0765 75 15 130 1981-01-08T22:29:30.024Z 1981-01-08T23:02:18.024Z ORB0766 1 15 130 1981-01-09T22:37:52.016Z 1981-01-09T22:37:52.016Z ORB0767 97 15 130 1981-01-10T22:49:25.456Z 1981-01-10T23:08:37.456Z ORB0768 98 15 130 1981-01-11T22:47:34.304Z 1981-01-11T23:13:58.304Z ORB0769 84 15 130 1981-01-12T22:56:42.648Z 1981-01-12T23:13:30.648Z ORB0770 92 15 130 1981-01-13T22:57:26.400Z 1981-01-13T23:16:26.400Z ORB0771 111 15 130 1981-01-14T22:57:45.592Z 1981-01-14T23:21:21.592Z ORB0772 91 15 130 1981-01-15T23:03:04.176Z 1981-01-15T23:23:40.176Z ORB0773 71 15 130 1981-01-16T23:07:46.208Z 1981-01-16T23:21:46.208Z ORB0774 88 15 130 1981-01-17T23:10:03.616Z 1981-01-17T23:27:39.616Z ORB0775 99 15 130 1981-01-18T23:08:20.480Z 1981-01-18T23:35:08.480Z ORB0776 166 15 130 1981-01-19T23:12:00.704Z 1981-01-19T23:45:00.704Z ORB0777 72 15 130 1981-01-20T23:17:40.752Z 1981-01-20T23:32:16.752Z ORB0778 60 15 130 1981-01-21T23:25:07.368Z 1981-01-21T23:36:55.368Z ORB0779 26 15 130 1981-01-22T23:15:45.888Z 1981-01-22T23:30:33.888Z ORB0780 41 15 130 1981-01-23T23:26:23.856Z 1981-01-23T23:34:23.856Z ORB0781 12 15 130 1981-01-24T23:34:49.264Z 1981-01-24T23:37:01.264Z ORB0783 17 15 130 1981-01-26T23:37:14.416Z 1981-01-26T23:40:26.416Z ORB0784 47 15 130 1981-01-27T23:35:02.200Z 1981-01-27T23:44:50.200Z ORB0785 44 15 130 1981-01-28T23:38:25.400Z 1981-01-28T23:47:25.400Z ORB0786 29 15 130 1981-01-29T23:42:00.256Z 1981-01-29T23:47:48.256Z ORB0787 44 15 130 1981-01-30T23:43:22.624Z 1981-01-30T23:52:34.624Z ORB0788 104 15 130 1981-01-31T23:53:56.520Z 1981-01-31T00:18:44.520Z ORB0789 32 15 130 1981-02-01T23:51:29.992Z 1981-02-01T23:57:41.992Z ORB0790 67 15 130 1981-02-02T23:49:15.104Z 1981-02-03T00:07:27.105Z ORB0791 65 15 130 1981-02-03T23:45:35.864Z 1981-02-03T23:59:47.864Z ORB0792 120 15 130 1981-02-04T23:58:55.856Z 1981-02-05T00:28:31.857Z ORB0793 81 15 130 1981-02-05T23:53:20.904Z 1981-02-06T00:13:56.907Z ORB0794 100 15 130 1981-02-06T23:48:57.632Z 1981-02-07T00:13:21.635Z ORB0795 48 15 130 1981-02-08T00:05:04.981Z 1981-02-08T00:14:28.981Z ORB0796 65 15 130 1981-02-08T23:55:26.464Z 1981-02-09T00:18:50.460Z ORB0797 1 15 130 1981-02-09T23:56:11.800Z 1981-02-09T23:56:11.800Z ORB0798 60 15 130 1981-02-11T00:08:20.675Z 1981-02-11T00:20:20.675Z ORB0799 3 15 130 1981-02-12T00:13:53.716Z 1981-02-12T00:14:17.716Z 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.