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 ---------------------------------------------------------------------------- ORB1900 1 15 130 1984-02-18T00:11:48.767Z 1984-02-18T00:11:48.767Z ORB1901 193 15 130 1984-02-19T00:11:14.783Z 1984-02-19T00:49:38.783Z ORB1902 213 15 130 1984-02-21T00:07:04.220Z 1984-02-21T00:49:28.220Z ORB1903 227 15 130 1984-02-21T00:08:05.087Z 1984-02-21T00:53:17.087Z ORB1905 164 15 130 1984-02-23T00:08:41.149Z 1984-02-23T00:42:17.149Z ORB1911 186 15 130 1984-02-29T00:05:16.991Z 1984-02-29T00:42:16.991Z ORB1912 1 15 130 1984-03-02T00:16:13.391Z 1984-03-02T00:16:13.391Z ORB1913 104 15 130 1984-03-02T00:12:33.392Z 1984-03-02T00:33:09.392Z ORB1914 144 15 130 1984-03-04T00:07:17.016Z 1984-03-04T00:38:29.016Z ORB1915 111 15 130 1984-03-04T00:12:36.291Z 1984-03-04T00:34:36.291Z ORB1916 185 15 130 1984-03-06T00:04:55.029Z 1984-03-06T00:43:19.029Z ORB1917 64 15 130 1984-03-06T00:12:01.661Z 1984-03-06T00:34:37.661Z ORB1918 153 15 130 1984-03-08T00:07:44.026Z 1984-03-08T00:42:44.026Z ORB1919 53 15 130 1984-03-08T00:11:02.153Z 1984-03-08T00:22:14.153Z ORB1922 69 15 130 1984-03-12T00:09:43.413Z 1984-03-12T00:23:19.413Z ORB1923 143 15 130 1984-03-12T00:13:12.882Z 1984-03-12T00:46:12.882Z ORB1926 90 15 130 1984-03-16T00:12:16.879Z 1984-03-16T00:31:52.879Z ORB1927 86 15 130 1984-03-16T00:10:22.196Z 1984-03-16T00:27:58.196Z ORB1928 5 15 130 1984-03-18T00:10:51.559Z 1984-03-18T00:26:51.559Z ORB1930 64 15 130 1984-03-20T00:13:13.803Z 1984-03-20T00:44:37.803Z ORB1931 110 15 130 1984-03-20T00:11:43.181Z 1984-03-20T00:33:31.181Z ORB1933 106 15 130 1984-03-22T00:06:18.483Z 1984-03-22T00:28:18.483Z ORB1935 72 15 130 1984-03-24T00:05:54.887Z 1984-03-24T00:20:06.887Z ORB1936 2 15 130 1984-03-26T00:10:13.431Z 1984-03-26T00:13:37.431Z ORB1937 58 15 130 1984-03-26T00:13:32.292Z 1984-03-26T00:24:56.292Z ORB1938 102 15 130 1984-03-28T00:05:27.498Z 1984-03-28T00:26:03.498Z ORB1940 88 15 130 1984-03-30T00:04:55.042Z 1984-03-30T00:23:31.042Z ORB1941 104 15 130 1984-03-30T00:07:03.429Z 1984-03-30T00:27:39.429Z ORB1942 70 15 130 1984-04-01T00:06:12.256Z 1984-04-01T00:23:24.256Z ORB1943 76 15 130 1984-04-01T00:03:57.543Z 1984-04-01T00:18:57.543Z ORB1944 113 15 130 1984-04-03T00:03:55.781Z 1984-04-03T00:30:19.781Z ORB1945 111 15 130 1984-04-03T00:03:18.082Z 1984-04-03T00:25:18.082Z ORB1946 157 15 130 1984-04-03T23:58:04.896Z 1984-04-05T00:33:16.899Z ORB1947 115 15 130 1984-04-05T00:03:04.246Z 1984-04-05T00:26:28.246Z ORB1948 88 15 130 1984-04-07T00:06:04.227Z 1984-04-07T00:24:40.227Z ORB1950 105 15 130 1984-04-09T00:04:05.734Z 1984-04-09T00:24:53.734Z ORB1951 126 15 130 1984-04-09T00:01:55.346Z 1984-04-09T00:27:43.346Z ORB1953 80 15 130 1984-04-11T00:05:36.318Z 1984-04-11T00:21:36.318Z ORB1954 110 15 130 1984-04-11T23:53:39.688Z 1984-04-13T00:21:27.688Z ORB1955 77 15 130 1984-04-13T00:07:07.650Z 1984-04-13T00:23:43.650Z ORB1956 88 15 130 1984-04-15T00:09:48.204Z 1984-04-15T00:28:12.204Z ORB1958 2 15 130 1984-04-15T23:53:23.080Z 1984-04-15T23:53:35.080Z ORB1960 2 15 130 1984-04-17T23:55:12.280Z 1984-04-17T23:55:24.280Z ORB1965 1 15 130 1984-04-23T23:51:07.136Z 1984-04-23T23:51:07.136Z ORB1967 37 15 130 1984-04-25T23:51:39.368Z 1984-04-25T23:59:27.368Z ORB1968 1 15 130 1984-04-25T23:51:50.056Z 1984-04-25T23:51:50.056Z ORB1969 86 15 130 1984-04-27T00:04:01.180Z 1984-04-27T00:21:01.180Z ORB1970 29 15 130 1984-04-27T23:59:48.720Z 1984-04-29T00:19:48.719Z ORB1971 14 15 130 1984-04-29T00:07:36.648Z 1984-04-29T00:10:36.648Z ORB1972 171 15 130 1984-04-29T23:50:24.944Z 1984-05-01T00:32:48.941Z ORB1974 36 15 130 1984-05-01T23:57:02.512Z 1984-05-03T00:15:02.510Z ORB1975 108 15 130 1984-05-03T23:50:03.728Z 1984-05-03T00:20:03.731Z ORB1976 117 15 130 1984-05-03T23:50:18.712Z 1984-05-05T00:22:06.710Z ORB1977 149 15 130 1984-05-05T23:56:20.576Z 1984-05-05T00:33:08.579Z ORB1978 81 15 130 1984-05-05T23:56:46.640Z 1984-05-07T00:16:22.637Z ORB1979 136 15 130 1984-05-07T23:52:48.856Z 1984-05-07T00:33:00.852Z ORB1981 156 15 130 1984-05-09T23:53:29.608Z 1984-05-09T00:32:29.611Z ORB1982 3 15 130 1984-05-09T23:56:56.120Z 1984-05-11T00:17:20.120Z ORB1983 9 15 130 1984-05-11T23:49:46.680Z 1984-05-11T00:20:22.676Z ORB1984 121 15 130 1984-05-11T23:49:25.248Z 1984-05-13T00:20:37.247Z ORB1986 110 15 130 1984-05-13T23:57:06.304Z 1984-05-15T00:27:06.304Z ORB1987 29 15 130 1984-05-15T23:51:56.696Z 1984-05-15T23:59:44.696Z ORB1988 41 15 130 1984-05-15T23:51:46.952Z 1984-05-15T23:59:46.952Z ORB1989 3 15 130 1984-05-17T23:57:13.032Z 1984-05-17T00:23:13.035Z ORB1991 190 15 130 1984-05-19T23:46:52.544Z 1984-05-19T00:32:40.546Z ORB1992 35 15 130 1984-05-19T23:55:05.912Z 1984-05-21T00:08:29.914Z ORB1993 163 15 130 1984-05-21T23:47:30.984Z 1984-05-21T00:24:30.982Z ORB1994 27 15 130 1984-05-21T23:49:43.720Z 1984-05-21T23:56:43.720Z ORB1995 146 15 130 1984-05-23T23:48:08.104Z 1984-05-23T00:24:20.104Z ORB1996 117 15 130 1984-05-23T23:53:32.104Z 1984-05-25T00:19:44.101Z ORB1997 72 15 130 1984-05-25T23:56:41.240Z 1984-05-25T00:16:05.237Z ORB1998 156 15 130 1984-05-25T23:45:16.024Z 1984-05-27T00:22:04.026Z ORB1999 23 15 130 1984-05-27T23:58:50.352Z 1984-05-27T00:10:02.355Z 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.