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 ---------------------------------------------------------------------------- ORB0600 163 15 130 1980-07-27T14:59:51.968Z 1980-07-27T15:32:15.968Z ORB0601 52 15 130 1980-07-28T15:21:12.996Z 1980-07-28T15:31:24.996Z ORB0602 117 15 130 1980-07-29T15:17:21.324Z 1980-07-29T15:40:33.324Z ORB0603 110 15 130 1980-07-30T15:22:28.716Z 1980-07-30T15:44:16.716Z ORB0604 187 15 130 1980-07-31T15:20:23.920Z 1980-07-31T15:57:47.920Z ORB0605 67 15 130 1980-08-01T15:30:07.060Z 1980-08-01T15:43:31.060Z ORB0606 126 15 130 1980-08-02T15:33:14.236Z 1980-08-02T15:58:26.236Z ORB0607 177 15 130 1980-08-03T15:25:57.580Z 1980-08-03T16:02:21.580Z ORB0608 76 15 130 1980-08-04T15:34:53.200Z 1980-08-04T15:50:05.200Z ORB0609 79 15 130 1980-08-05T15:35:49.164Z 1980-08-05T15:51:25.164Z ORB0610 96 15 130 1980-08-06T15:45:33.504Z 1980-08-06T16:04:33.504Z ORB0611 127 15 130 1980-08-07T15:32:06.232Z 1980-08-07T15:57:42.232Z ORB0612 227 15 130 1980-08-08T15:33:39.408Z 1980-08-08T16:19:39.408Z ORB0613 173 15 130 1980-08-09T15:46:25.024Z 1980-08-09T16:20:49.024Z ORB0614 148 15 130 1980-08-10T15:52:47.084Z 1980-08-10T16:23:11.084Z ORB0615 164 15 130 1980-08-11T15:53:45.640Z 1980-08-11T16:27:09.640Z ORB0616 154 15 130 1980-08-12T15:58:32.632Z 1980-08-12T16:29:20.632Z ORB0617 157 15 130 1980-08-13T16:01:20.092Z 1980-08-13T16:32:32.092Z ORB0618 167 15 130 1980-08-14T16:03:32.008Z 1980-08-14T16:37:08.008Z ORB0619 79 15 130 1980-08-15T16:03:20.360Z 1980-08-15T16:18:56.360Z ORB0620 146 15 130 1980-08-16T16:10:33.136Z 1980-08-16T16:39:45.136Z ORB0621 154 15 130 1980-08-17T16:13:34.320Z 1980-08-17T16:44:10.320Z ORB0622 215 15 130 1980-08-18T15:59:35.900Z 1980-08-18T16:42:47.900Z ORB0623 108 15 130 1980-08-19T16:19:13.860Z 1980-08-19T16:43:25.860Z ORB0624 116 15 130 1980-08-20T16:11:40.188Z 1980-08-20T16:34:52.188Z ORB0625 119 15 130 1980-08-21T16:18:18.824Z 1980-08-21T16:42:42.824Z ORB0626 156 15 130 1980-08-22T16:11:09.800Z 1980-08-22T16:42:57.800Z ORB0627 186 15 130 1980-08-23T16:25:49.060Z 1980-08-23T17:02:49.060Z ORB0628 144 15 130 1980-08-24T16:27:52.572Z 1980-08-24T17:04:52.572Z ORB0629 62 15 130 1980-08-25T16:35:56.324Z 1980-08-25T16:48:44.324Z ORB0630 54 15 130 1980-08-26T16:39:12.292Z 1980-08-26T16:49:48.292Z ORB0631 110 15 130 1980-08-27T16:36:40.424Z 1980-08-27T17:01:16.424Z ORB0632 157 15 130 1980-08-28T16:38:44.756Z 1980-08-28T17:12:20.756Z ORB0633 151 15 130 1980-08-29T16:47:13.232Z 1980-08-29T17:17:49.232Z ORB0634 156 15 130 1980-08-30T16:49:05.836Z 1980-08-30T17:20:05.836Z ORB0635 36 15 130 1980-08-31T16:49:22.548Z 1980-08-31T17:03:34.548Z ORB0636 62 15 130 1980-09-01T16:53:51.332Z 1980-09-01T17:06:03.332Z ORB0637 106 15 130 1980-09-02T16:50:20.112Z 1980-09-02T17:11:44.112Z ORB0638 208 15 130 1980-09-03T16:46:49.644Z 1980-09-03T17:28:13.644Z ORB0639 54 15 130 1980-09-04T16:47:53.492Z 1980-09-04T17:13:29.492Z ORB0640 136 15 130 1980-09-05T16:52:10.016Z 1980-09-05T17:20:22.016Z ORB0641 42 15 130 1980-09-06T17:08:14.384Z 1980-09-06T17:18:02.384Z ORB0642 19 15 130 1980-09-07T17:09:30.572Z 1980-09-07T17:13:06.572Z ORB0643 98 15 130 1980-09-08T17:10:46.536Z 1980-09-08T17:30:10.536Z ORB0644 86 15 130 1980-09-09T17:14:26.248Z 1980-09-09T17:31:26.248Z ORB0645 114 15 130 1980-09-10T17:08:41.680Z 1980-09-10T17:31:17.680Z ORB0646 78 15 130 1980-09-11T17:19:08.800Z 1980-09-11T17:37:20.800Z ORB0647 54 15 130 1980-09-12T17:19:47.572Z 1980-09-12T17:30:23.572Z ORB0648 58 15 130 1980-09-13T17:18:49.980Z 1980-09-13T17:31:01.980Z ORB0649 164 15 130 1980-09-14T17:21:27.984Z 1980-09-14T18:02:39.984Z ORB0650 107 15 130 1980-09-15T17:28:05.572Z 1980-09-15T17:49:17.572Z ORB0651 133 15 130 1980-09-16T17:26:06.724Z 1980-09-16T17:52:42.724Z ORB0652 85 15 130 1980-09-17T17:33:19.380Z 1980-09-17T17:50:07.380Z ORB0653 245 15 130 1980-09-18T17:27:55.548Z 1980-09-18T18:17:07.548Z ORB0654 123 15 130 1980-09-19T17:34:19.212Z 1980-09-19T17:58:43.212Z ORB0655 217 15 130 1980-09-20T17:33:06.340Z 1980-09-20T18:18:06.340Z ORB0656 89 15 130 1980-09-21T17:36:40.928Z 1980-09-21T18:03:04.928Z ORB0657 200 15 130 1980-09-22T17:39:02.944Z 1980-09-22T18:19:38.944Z ORB0658 216 15 130 1980-09-23T17:42:12.392Z 1980-09-23T18:26:00.392Z ORB0659 236 15 130 1980-09-24T17:44:33.232Z 1980-09-24T18:33:33.232Z ORB0660 204 15 130 1980-09-25T17:46:53.476Z 1980-09-25T18:33:29.476Z ORB0661 158 15 130 1980-09-26T17:50:01.096Z 1980-09-26T18:22:01.096Z ORB0662 225 15 130 1980-09-27T17:52:44.108Z 1980-09-27T18:41:44.104Z ORB0663 146 15 130 1980-09-28T17:56:26.476Z 1980-09-28T18:33:14.476Z ORB0664 225 15 130 1980-09-29T17:57:56.276Z 1980-09-29T18:44:08.272Z ORB0665 241 15 130 1980-09-30T18:01:01.420Z 1980-09-30T18:50:01.424Z ORB0666 225 15 130 1980-10-01T18:03:05.952Z 1980-10-01T18:48:17.952Z ORB0667 206 15 130 1980-10-02T18:05:57.864Z 1980-10-02T18:54:09.864Z ORB0668 214 15 130 1980-10-03T18:08:25.168Z 1980-10-03T18:53:13.168Z ORB0669 230 15 130 1980-10-04T18:11:27.868Z 1980-10-04T19:00:39.864Z ORB0670 104 15 130 1980-10-05T18:13:53.964Z 1980-10-05T18:42:29.968Z ORB0671 155 15 130 1980-10-06T18:16:31.488Z 1980-10-06T18:49:43.488Z ORB0672 117 15 130 1980-10-07T18:19:20.444Z 1980-10-07T18:53:32.440Z ORB0673 158 15 130 1980-10-08T18:21:32.828Z 1980-10-08T18:54:44.832Z ORB0674 152 15 130 1980-10-09T18:24:20.696Z 1980-10-09T19:04:08.696Z ORB0675 222 15 130 1980-10-10T18:27:56.048Z 1980-10-10T19:14:56.048Z ORB0676 163 15 130 1980-10-11T18:29:18.888Z 1980-10-11T19:09:18.888Z ORB0677 148 15 130 1980-10-12T18:32:53.248Z 1980-10-12T19:12:53.248Z ORB0678 167 15 130 1980-10-13T18:34:27.168Z 1980-10-13T19:09:15.168Z ORB0679 146 15 130 1980-10-14T18:37:00.660Z 1980-10-14T19:07:12.656Z ORB0680 121 15 130 1980-10-15T18:40:09.752Z 1980-10-15T19:09:45.752Z ORB0681 150 15 130 1980-10-16T18:42:18.472Z 1980-10-16T19:13:42.472Z ORB0682 183 15 130 1980-10-17T18:44:38.864Z 1980-10-17T19:23:38.864Z ORB0683 155 15 130 1980-10-18T18:52:46.936Z 1980-10-18T19:25:58.936Z ORB0684 182 15 130 1980-10-19T18:50:18.688Z 1980-10-19T19:36:06.688Z ORB0685 78 15 130 1980-10-20T19:09:26.288Z 1980-10-20T19:25:26.288Z ORB0686 143 15 130 1980-10-21T18:54:57.608Z 1980-10-21T19:28:09.608Z ORB0687 138 15 130 1980-10-22T18:58:28.744Z 1980-10-22T19:27:04.744Z ORB0688 129 15 130 1980-10-23T19:07:35.768Z 1980-10-23T19:35:11.768Z ORB0689 93 15 130 1980-10-24T19:12:42.672Z 1980-10-24T19:32:30.672Z ORB0690 65 15 130 1980-10-25T19:23:49.504Z 1980-10-25T19:37:49.504Z ORB0691 125 15 130 1980-10-26T19:08:08.408Z 1980-10-26T19:41:32.408Z ORB0692 146 15 130 1980-10-27T19:13:03.072Z 1980-10-27T19:43:51.072Z ORB0693 135 15 130 1980-10-28T19:13:21.896Z 1980-10-28T19:42:33.896Z ORB0694 150 15 130 1980-10-29T19:15:52.768Z 1980-10-29T19:47:28.768Z ORB0695 137 15 130 1980-10-30T19:18:59.760Z 1980-10-30T19:49:11.760Z ORB0696 151 15 130 1980-10-31T19:19:54.888Z 1980-10-31T19:50:18.888Z ORB0697 87 15 130 1980-11-01T19:38:14.192Z 1980-11-01T19:56:14.192Z ORB0698 62 15 130 1980-11-02T19:37:45.696Z 1980-11-02T19:57:33.696Z ORB0699 48 15 130 1980-11-03T19:34:41.440Z 1980-11-03T19:44:05.440Z 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.