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 ---------------------------------------------------------------------------- ORB1800 181 15 130 1983-11-10T00:20:42.114Z 1983-11-10T00:57:54.114Z ORB1801 111 15 130 1983-11-12T00:36:01.866Z 1983-11-12T00:58:01.866Z ORB1802 194 15 130 1983-11-12T00:19:45.202Z 1983-11-12T00:58:33.202Z ORB1803 227 15 130 1983-11-14T00:19:28.075Z 1983-11-14T01:05:28.075Z ORB1804 225 15 130 1983-11-14T00:19:34.626Z 1983-11-14T01:04:34.626Z ORB1805 189 15 130 1983-11-16T00:18:40.844Z 1983-11-16T00:56:16.844Z ORB1806 122 15 130 1983-11-16T00:26:22.762Z 1983-11-16T00:50:34.762Z ORB1807 161 15 130 1983-11-18T00:19:04.409Z 1983-11-18T00:52:04.409Z ORB1808 188 15 130 1983-11-18T00:17:57.818Z 1983-11-18T00:56:57.818Z ORB1809 215 15 130 1983-11-20T00:17:39.023Z 1983-11-20T01:01:03.023Z ORB1810 167 15 130 1983-11-20T00:17:08.057Z 1983-11-20T00:50:32.057Z ORB1811 204 15 130 1983-11-22T00:18:24.980Z 1983-11-22T01:01:36.980Z ORB1812 221 15 130 1983-11-22T00:16:29.769Z 1983-11-22T01:02:05.769Z ORB1813 88 15 130 1983-11-24T00:23:58.492Z 1983-11-24T00:41:34.492Z ORB1814 214 15 130 1983-11-24T00:16:03.184Z 1983-11-24T01:00:03.184Z ORB1816 220 15 130 1983-11-26T00:15:12.615Z 1983-11-26T01:00:00.615Z ORB1817 225 15 130 1983-11-28T00:15:05.425Z 1983-11-28T01:00:53.425Z ORB1818 215 15 130 1983-11-28T00:14:58.214Z 1983-11-28T00:58:34.214Z ORB1819 208 15 130 1983-11-30T00:14:51.250Z 1983-11-30T01:00:39.250Z ORB1820 110 15 130 1983-11-30T00:22:08.466Z 1983-11-30T00:43:56.466Z ORB1821 215 15 130 1983-12-02T00:13:37.893Z 1983-12-02T00:59:13.893Z ORB1822 196 15 130 1983-12-02T00:13:55.567Z 1983-12-02T00:54:19.567Z ORB1824 223 15 130 1983-12-04T00:13:07.779Z 1983-12-04T00:58:43.779Z ORB1825 142 15 130 1983-12-06T00:13:14.380Z 1983-12-06T00:41:26.380Z ORB1826 191 15 130 1983-12-06T00:12:09.348Z 1983-12-06T00:53:21.348Z ORB1827 213 15 130 1983-12-08T00:11:52.714Z 1983-12-08T00:55:40.714Z ORB1828 90 15 130 1983-12-08T00:19:36.306Z 1983-12-08T00:37:24.306Z ORB1829 182 15 130 1983-12-10T00:13:20.561Z 1983-12-10T00:54:32.561Z ORB1831 216 15 130 1983-12-12T00:11:02.510Z 1983-12-12T00:57:02.510Z ORB1832 154 15 130 1983-12-12T00:10:36.247Z 1983-12-12T00:41:12.247Z ORB1833 221 15 130 1983-12-14T00:10:22.518Z 1983-12-14T00:57:10.518Z ORB1834 112 15 130 1983-12-14T00:18:33.340Z 1983-12-14T00:40:45.340Z ORB1835 187 15 130 1983-12-16T00:10:08.728Z 1983-12-16T00:48:08.728Z ORB1836 97 15 130 1983-12-16T00:23:32.696Z 1983-12-16T00:42:44.696Z ORB1837 226 15 130 1983-12-18T00:09:57.256Z 1983-12-18T00:55:09.256Z ORB1838 177 15 130 1983-12-18T00:11:10.416Z 1983-12-18T00:47:22.416Z ORB1839 204 15 130 1983-12-20T00:09:48.184Z 1983-12-20T00:56:00.184Z ORB1840 111 15 130 1983-12-20T00:23:38.563Z 1983-12-20T00:45:50.563Z ORB1841 107 15 130 1983-12-21T00:17:53.556Z 1983-12-21T00:40:17.556Z ORB1844 124 15 130 1983-12-24T00:20:42.227Z 1983-12-24T00:45:18.227Z ORB1847 60 15 130 1983-12-27T00:17:00.356Z 1983-12-27T00:28:48.356Z ORB1848 221 15 130 1983-12-28T00:08:55.577Z 1983-12-28T00:53:19.577Z ORB1849 152 15 130 1983-12-29T00:08:13.438Z 1983-12-29T00:39:25.438Z ORB1850 109 15 130 1983-12-30T00:16:21.631Z 1983-12-30T00:38:09.631Z ORB1851 149 15 130 1983-12-31T00:08:18.364Z 1983-12-31T00:38:54.364Z ORB1853 179 15 130 1984-01-02T00:08:13.376Z 1984-01-02T00:43:49.376Z ORB1854 151 15 130 1984-01-03T00:07:59.616Z 1984-01-03T00:42:35.616Z ORB1855 216 15 130 1984-01-04T00:08:10.671Z 1984-01-04T00:51:10.671Z ORB1857 62 15 130 1984-01-06T00:20:09.564Z 1984-01-06T00:33:33.564Z ORB1858 47 15 130 1984-01-07T00:21:33.599Z 1984-01-07T00:31:09.599Z ORB1859 1 15 130 1984-01-08T00:08:33.991Z 1984-01-08T00:08:33.991Z ORB1860 205 15 130 1984-01-09T00:07:58.710Z 1984-01-09T00:53:22.710Z ORB1861 169 15 130 1984-01-10T00:08:23.726Z 1984-01-10T00:47:35.726Z ORB1862 181 15 130 1984-01-11T00:08:13.008Z 1984-01-11T00:53:49.008Z ORB1863 196 15 130 1984-01-12T00:08:02.526Z 1984-01-12T00:48:02.526Z ORB1864 178 15 130 1984-01-13T00:15:40.246Z 1984-01-13T00:51:04.246Z ORB1865 202 15 130 1984-01-14T00:08:06.135Z 1984-01-14T00:53:18.135Z ORB1866 91 15 130 1984-01-15T00:17:08.161Z 1984-01-15T00:36:20.161Z ORB1867 200 15 130 1984-01-16T00:08:22.290Z 1984-01-16T00:52:22.290Z ORB1868 211 15 130 1984-01-17T00:08:12.487Z 1984-01-17T00:54:00.487Z ORB1869 77 15 130 1984-01-18T00:16:38.718Z 1984-01-18T00:31:50.718Z ORB1870 191 15 130 1984-01-19T00:08:52.950Z 1984-01-19T00:52:28.950Z ORB1871 214 15 130 1984-01-20T00:08:55.147Z 1984-01-20T00:52:19.147Z ORB1872 196 15 130 1984-01-21T00:08:45.277Z 1984-01-21T00:51:21.277Z ORB1873 168 15 130 1984-01-22T00:08:47.304Z 1984-01-22T00:49:23.304Z ORB1874 173 15 130 1984-01-23T00:13:25.197Z 1984-01-23T00:48:13.197Z ORB1875 222 15 130 1984-01-24T00:08:38.921Z 1984-01-24T00:53:02.921Z ORB1876 92 15 130 1984-01-25T00:12:16.446Z 1984-01-25T00:42:16.446Z ORB1877 47 15 130 1984-01-26T00:08:53.738Z 1984-01-26T00:43:29.738Z ORB1878 117 15 130 1984-01-27T00:17:40.177Z 1984-01-27T00:42:28.177Z ORB1879 13 15 130 1984-01-28T00:09:17.693Z 1984-01-28T00:41:17.693Z ORB1880 127 15 130 1984-01-29T00:14:54.887Z 1984-01-29T00:43:42.887Z ORB1881 64 15 130 1984-01-30T00:10:43.734Z 1984-01-30T00:37:55.734Z ORB1882 88 15 130 1984-01-31T00:15:08.205Z 1984-01-31T00:32:56.205Z ORB1883 68 15 130 1984-02-01T00:21:20.276Z 1984-02-01T00:37:20.276Z ORB1884 1 15 130 1984-02-02T00:24:19.922Z 1984-02-02T00:24:19.922Z ORB1885 17 15 130 1984-02-03T00:30:43.121Z 1984-02-03T00:35:43.121Z ORB1887 75 15 130 1984-02-05T00:17:04.094Z 1984-02-05T00:41:04.094Z ORB1888 70 15 130 1984-02-06T00:24:25.831Z 1984-02-06T00:39:49.831Z ORB1891 64 15 130 1984-02-09T00:13:39.847Z 1984-02-09T00:37:39.847Z ORB1892 47 15 130 1984-02-10T00:23:35.567Z 1984-02-10T00:32:47.567Z ORB1893 138 15 130 1984-02-11T00:21:54.575Z 1984-02-11T00:49:54.575Z ORB1894 56 15 130 1984-02-12T00:14:01.003Z 1984-02-12T00:34:49.003Z ORB1895 117 15 130 1984-02-13T00:15:42.846Z 1984-02-13T00:39:42.846Z ORB1896 153 15 130 1984-02-14T00:10:24.098Z 1984-02-14T00:41:00.098Z ORB1897 233 15 130 1984-02-15T00:07:52.758Z 1984-02-15T00:54:16.758Z ORB1898 209 15 130 1984-02-17T00:08:20.825Z 1984-02-17T00:52:56.825Z ORB1899 233 15 130 1984-02-17T00:07:34.165Z 1984-02-17T00:53:58.165Z 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.