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 ---------------------------------------------------------------------------- ORB2100 7 15 130 1984-09-04T23:26:20.431Z 1984-09-04T23:28:20.431Z ORB2101 68 15 130 1984-09-05T23:28:43.730Z 1984-09-05T23:44:55.730Z ORB2102 39 15 130 1984-09-06T23:19:54.787Z 1984-09-06T23:30:30.787Z ORB2103 93 15 130 1984-09-07T23:07:05.571Z 1984-09-07T23:28:17.571Z ORB2104 64 15 130 1984-09-08T23:17:04.053Z 1984-09-08T23:30:16.053Z ORB2105 108 15 130 1984-09-09T23:06:50.204Z 1984-09-09T23:33:26.204Z ORB2106 3 15 130 1984-09-10T23:16:59.998Z 1984-09-10T23:46:35.998Z ORB2107 40 15 130 1984-09-11T23:16:45.408Z 1984-09-11T23:36:33.408Z ORB2109 82 15 130 1984-09-13T23:24:50.976Z 1984-09-13T23:42:02.976Z ORB2110 87 15 130 1984-09-14T23:05:47.090Z 1984-09-14T23:34:23.090Z ORB2111 59 15 130 1984-09-15T23:29:42.728Z 1984-09-15T23:41:30.728Z ORB2112 201 15 130 1984-09-16T23:05:49.872Z 1984-09-16T23:48:49.872Z ORB2113 6 15 130 1984-09-17T23:15:44.503Z 1984-09-17T23:31:08.503Z ORB2114 54 15 130 1984-09-18T23:04:26.606Z 1984-09-18T23:15:02.606Z ORB2116 46 15 130 1984-09-20T23:21:49.174Z 1984-09-20T23:32:37.174Z ORB2117 109 15 130 1984-09-21T23:04:29.614Z 1984-09-21T23:26:53.614Z ORB2118 100 15 130 1984-09-22T23:15:45.479Z 1984-09-22T23:35:33.479Z ORB2119 50 15 130 1984-09-23T23:02:36.763Z 1984-09-23T23:12:48.763Z ORB2121 86 15 130 1984-09-25T23:12:53.563Z 1984-09-25T23:29:53.563Z ORB2122 77 15 130 1984-09-26T23:11:55.074Z 1984-09-26T23:27:55.074Z ORB2123 96 15 130 1984-09-27T23:12:19.991Z 1984-09-27T23:32:07.991Z ORB2124 179 15 130 1984-09-28T23:00:32.317Z 1984-09-28T23:41:56.317Z ORB2125 78 15 130 1984-09-29T23:11:55.771Z 1984-09-29T23:27:19.771Z ORB2126 187 15 130 1984-09-30T22:59:54.810Z 1984-09-30T23:42:54.810Z ORB2127 116 15 130 1984-10-01T23:09:53.272Z 1984-10-01T23:33:41.272Z ORB2128 69 15 130 1984-10-02T23:11:27.166Z 1984-10-02T23:26:15.166Z ORB2129 101 15 130 1984-10-03T23:09:48.503Z 1984-10-03T23:31:00.503Z ORB2130 80 15 130 1984-10-04T23:08:29.701Z 1984-10-04T23:24:17.701Z ORB2131 162 15 130 1984-10-05T22:58:37.295Z 1984-10-05T23:31:49.295Z ORB2132 97 15 130 1984-10-06T23:08:08.374Z 1984-10-06T23:30:08.374Z ORB2133 112 15 130 1984-10-07T22:58:02.954Z 1984-10-07T23:23:26.954Z ORB2134 91 15 130 1984-10-08T23:07:33.055Z 1984-10-08T23:28:09.055Z ORB2135 92 15 130 1984-10-09T23:08:14.696Z 1984-10-09T23:26:50.696Z ORB2136 90 15 130 1984-10-10T23:05:55.898Z 1984-10-10T23:29:19.898Z ORB2137 68 15 130 1984-10-11T23:06:36.684Z 1984-10-11T23:21:12.684Z ORB2139 120 15 130 1984-10-13T22:59:33.105Z 1984-10-13T23:28:09.105Z ORB2140 143 15 130 1984-10-14T22:53:36.791Z 1984-10-14T23:24:48.791Z ORB2141 95 15 130 1984-10-15T23:03:04.163Z 1984-10-15T23:21:52.163Z ORB2142 35 15 130 1984-10-16T23:04:07.249Z 1984-10-16T23:10:55.249Z ORB2143 81 15 130 1984-10-17T23:03:22.077Z 1984-10-17T23:23:10.077Z ORB2144 82 15 130 1984-10-18T23:01:12.677Z 1984-10-18T23:17:36.677Z ORB2145 158 15 130 1984-10-19T22:50:03.080Z 1984-10-19T23:23:39.080Z ORB2146 97 15 130 1984-10-20T23:00:41.316Z 1984-10-20T23:19:53.316Z ORB2147 156 15 130 1984-10-21T22:50:43.416Z 1984-10-21T23:21:43.416Z ORB2148 46 15 130 1984-10-22T22:59:57.411Z 1984-10-22T23:31:57.411Z ORB2149 109 15 130 1984-10-23T22:58:59.334Z 1984-10-23T23:21:47.334Z ORB2150 58 15 130 1984-10-24T22:57:49.217Z 1984-10-24T23:09:49.217Z ORB2152 77 15 130 1984-10-26T22:57:53.267Z 1984-10-26T23:13:29.267Z ORB2154 66 15 130 1984-10-28T22:57:21.332Z 1984-10-28T23:10:21.332Z ORB2155 88 15 130 1984-10-29T22:54:59.529Z 1984-10-29T23:12:23.529Z ORB2156 216 15 130 1984-10-30T22:45:49.876Z 1984-10-30T23:29:49.876Z ORB2157 38 15 130 1984-10-31T22:55:16.405Z 1984-10-31T23:04:16.405Z ORB2158 106 15 130 1984-11-01T22:54:31.146Z 1984-11-01T23:15:31.146Z ORB2159 63 15 130 1984-11-02T22:54:10.128Z 1984-11-02T23:06:34.128Z ORB2160 18 15 130 1984-11-03T22:50:49.382Z 1984-11-03T22:55:01.382Z ORB2161 58 15 130 1984-11-04T22:58:16.934Z 1984-11-04T23:09:40.934Z ORB2168 108 15 130 1984-11-11T22:50:16.324Z 1984-11-11T23:19:04.324Z ORB2169 2 15 130 1984-11-12T23:01:11.159Z 1984-11-12T23:01:23.159Z ORB2170 2 15 130 1984-11-13T22:58:18.497Z 1984-11-13T22:58:42.497Z ORB2171 207 15 130 1984-11-14T22:36:02.355Z 1984-11-14T23:19:02.355Z ORB2172 127 15 130 1984-11-15T22:38:34.748Z 1984-11-15T23:04:22.748Z ORB2173 172 15 130 1984-11-16T22:35:07.688Z 1984-11-16T23:10:55.688Z ORB2176 200 15 130 1984-11-19T22:34:13.899Z 1984-11-19T23:14:49.899Z ORB2177 66 15 130 1984-11-20T22:48:01.128Z 1984-11-20T23:07:25.128Z ORB2178 113 15 130 1984-11-21T22:40:54.915Z 1984-11-21T23:05:30.915Z ORB2179 159 15 130 1984-11-22T22:33:02.161Z 1984-11-22T23:12:38.161Z ORB2180 183 15 130 1984-11-23T22:32:34.000Z 1984-11-23T23:17:10.000Z ORB2181 228 15 130 1984-11-24T22:32:18.430Z 1984-11-24T23:17:42.430Z ORB2182 200 15 130 1984-11-25T22:32:15.450Z 1984-11-25T23:15:27.450Z ORB2183 218 15 130 1984-11-26T22:32:01.054Z 1984-11-26T23:17:01.054Z ORB2184 200 15 130 1984-11-27T22:31:47.238Z 1984-11-27T23:11:35.238Z ORB2185 203 15 130 1984-11-28T22:31:45.994Z 1984-11-28T23:12:09.994Z ORB2186 180 15 130 1984-11-29T22:32:09.312Z 1984-11-29T23:07:57.312Z ORB2187 218 15 130 1984-11-30T22:31:09.181Z 1984-11-30T23:14:33.181Z ORB2188 226 15 130 1984-12-01T22:30:57.589Z 1984-12-01T23:15:57.589Z ORB2189 204 15 130 1984-12-02T22:30:42.204Z 1984-12-02T23:12:42.204Z ORB2190 223 15 130 1984-12-03T22:30:54.943Z 1984-12-03T23:15:18.943Z ORB2192 96 15 130 1984-12-05T22:35:21.873Z 1984-12-05T22:56:45.873Z ORB2193 151 15 130 1984-12-06T22:30:00.025Z 1984-12-06T23:00:00.025Z ORB2194 156 15 130 1984-12-07T22:35:50.606Z 1984-12-07T23:06:50.606Z ORB2195 198 15 130 1984-12-08T22:29:41.593Z 1984-12-08T23:09:05.593Z ORB2196 116 15 130 1984-12-09T22:37:44.961Z 1984-12-09T23:00:44.961Z ORB2197 185 15 130 1984-12-10T22:29:48.684Z 1984-12-10T23:08:24.684Z ORB2198 109 15 130 1984-12-11T22:36:40.736Z 1984-12-11T22:58:16.736Z ORB2199 204 15 130 1984-12-12T22:29:09.088Z 1984-12-12T23:10:45.088Z 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.