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 ---------------------------------------------------------------------------- ORB1200 165 15 130 1982-03-20T01:23:12.610Z 1982-03-20T01:58:00.610Z ORB1201 55 15 130 1982-03-21T01:48:29.666Z 1982-03-21T01:59:17.666Z ORB1202 160 15 130 1982-03-22T01:21:58.494Z 1982-03-22T01:53:46.494Z ORB1203 132 15 130 1982-03-23T01:27:39.125Z 1982-03-23T01:55:03.125Z ORB1205 44 15 130 1982-03-25T01:24:11.575Z 1982-03-25T01:53:47.575Z ORB1207 69 15 130 1982-03-27T01:34:54.749Z 1982-03-27T01:52:42.749Z ORB1208 108 15 130 1982-03-28T01:29:33.789Z 1982-03-28T01:51:45.789Z ORB1210 122 15 130 1982-03-30T01:32:14.624Z 1982-03-30T01:56:26.624Z ORB1211 115 15 130 1982-03-31T01:27:52.403Z 1982-03-31T01:51:28.403Z ORB1212 4 15 130 1982-04-01T01:25:53.716Z 1982-04-01T01:32:41.716Z ORB1213 111 15 130 1982-04-02T01:30:54.542Z 1982-04-02T01:53:18.542Z ORB1214 127 15 130 1982-04-03T01:27:06.864Z 1982-04-03T01:52:18.864Z ORB1215 101 15 130 1982-04-04T01:30:30.664Z 1982-04-04T01:50:54.664Z ORB1216 86 15 130 1982-04-05T01:33:41.927Z 1982-04-05T01:50:41.927Z ORB1217 80 15 130 1982-04-06T01:34:28.642Z 1982-04-06T01:50:28.642Z ORB1218 110 15 130 1982-04-07T01:28:14.795Z 1982-04-07T01:50:02.795Z ORB1219 114 15 130 1982-04-08T01:30:48.377Z 1982-04-08T01:53:24.377Z ORB1220 31 15 130 1982-04-09T01:33:09.348Z 1982-04-09T01:45:57.348Z ORB1221 35 15 130 1982-04-10T01:35:05.780Z 1982-04-10T01:44:29.780Z ORB1222 79 15 130 1982-04-11T01:33:49.623Z 1982-04-11T01:50:01.623Z ORB1223 89 15 130 1982-04-12T01:36:20.874Z 1982-04-12T01:55:44.874Z ORB1224 124 15 130 1982-04-13T01:28:03.448Z 1982-04-13T01:52:39.448Z ORB1225 86 15 130 1982-04-14T01:27:21.499Z 1982-04-14T01:49:09.499Z ORB1226 146 15 130 1982-04-15T01:21:38.962Z 1982-04-15T01:52:26.962Z ORB1227 12 15 130 1982-04-16T01:44:19.841Z 1982-04-16T01:47:55.841Z ORB1228 67 15 130 1982-04-17T01:37:24.145Z 1982-04-17T01:50:36.145Z ORB1229 42 15 130 1982-04-18T01:29:27.878Z 1982-04-18T01:43:51.878Z ORB1231 2 15 130 1982-04-20T01:40:57.621Z 1982-04-20T01:41:33.621Z ORB1232 74 15 130 1982-04-22T01:25:47.699Z 1982-04-22T01:40:59.699Z ORB1234 2 15 130 1982-04-24T01:19:26.307Z 1982-04-24T01:36:14.307Z ORB1235 99 15 130 1982-04-24T01:19:38.873Z 1982-04-24T01:39:14.873Z ORB1236 43 15 130 1982-04-25T01:17:02.972Z 1982-04-25T01:27:38.972Z ORB1237 3 15 130 1982-04-26T01:17:38.625Z 1982-04-26T01:39:26.625Z ORB1238 111 15 130 1982-04-28T01:19:13.905Z 1982-04-28T01:46:49.905Z ORB1239 95 15 130 1982-04-28T01:25:48.747Z 1982-04-28T01:45:36.747Z ORB1241 1 15 130 1982-04-30T01:21:33.325Z 1982-04-30T01:21:33.325Z ORB1242 21 15 130 1982-05-01T01:34:19.114Z 1982-05-01T01:38:55.114Z ORB1243 1 15 130 1982-05-02T01:16:40.607Z 1982-05-02T01:16:40.607Z ORB1244 22 15 130 1982-05-03T01:33:37.830Z 1982-05-03T01:37:49.830Z ORB1245 44 15 130 1982-05-04T01:20:22.890Z 1982-05-04T01:36:34.890Z ORB1246 76 15 130 1982-05-05T01:25:19.707Z 1982-05-05T01:40:19.707Z ORB1247 22 15 130 1982-05-06T01:30:40.345Z 1982-05-06T01:35:28.345Z ORB1248 8 15 130 1982-05-08T01:22:00.835Z 1982-05-08T01:36:24.835Z ORB1249 174 15 130 1982-05-08T01:22:45.208Z 1982-05-08T01:57:21.208Z ORB1250 1 15 130 1982-05-10T01:33:41.496Z 1982-05-10T01:33:41.496Z ORB1251 89 15 130 1982-05-10T01:17:37.730Z 1982-05-10T01:35:37.730Z ORB1252 51 15 130 1982-05-11T01:31:21.942Z 1982-05-11T01:41:45.942Z ORB1253 124 15 130 1982-05-12T01:20:30.166Z 1982-05-12T01:45:06.166Z ORB1254 2 15 130 1982-05-14T01:22:37.969Z 1982-05-14T01:30:37.969Z ORB1255 2 15 130 1982-05-14T01:12:34.267Z 1982-05-14T01:20:58.267Z ORB1256 1 15 130 1982-05-16T01:56:19.461Z 1982-05-16T01:56:19.461Z ORB1257 14 15 130 1982-05-16T01:32:04.072Z 1982-05-16T01:35:16.072Z ORB1260 109 15 130 1982-05-20T01:21:43.038Z 1982-05-20T01:43:19.038Z ORB1261 2 15 130 1982-05-20T01:21:52.503Z 1982-05-20T01:22:04.503Z ORB1262 4 15 130 1982-05-22T01:57:14.255Z 1982-05-22T01:57:50.255Z ORB1263 1 15 130 1982-05-22T01:23:12.321Z 1982-05-22T01:23:12.321Z ORB1265 15 15 130 1982-05-24T01:34:33.499Z 1982-05-24T01:37:45.499Z ORB1266 2 15 130 1982-05-26T01:56:56.707Z 1982-05-26T01:57:20.707Z ORB1267 105 15 130 1982-05-26T01:18:44.339Z 1982-05-26T01:39:32.339Z ORB1268 1 15 130 1982-05-28T01:20:32.407Z 1982-05-28T01:20:32.407Z ORB1269 2 15 130 1982-05-28T01:28:44.932Z 1982-05-28T01:34:08.932Z ORB1270 80 15 130 1982-05-30T01:15:57.934Z 1982-05-30T01:31:45.934Z ORB1271 3 15 130 1982-05-30T01:17:11.431Z 1982-05-30T01:28:59.431Z ORB1272 111 15 130 1982-06-01T01:09:25.440Z 1982-06-01T01:32:01.440Z ORB1274 74 15 130 1982-06-03T01:15:55.005Z 1982-06-03T01:30:31.005Z ORB1275 2 15 130 1982-06-03T01:11:46.658Z 1982-06-03T01:49:46.658Z ORB1276 40 15 130 1982-06-05T01:24:26.873Z 1982-06-05T01:50:50.873Z ORB1277 193 15 130 1982-06-05T01:12:43.661Z 1982-06-05T01:54:31.661Z ORB1278 44 15 130 1982-06-07T01:25:37.028Z 1982-06-07T01:54:37.028Z ORB1279 204 15 130 1982-06-07T01:12:30.979Z 1982-06-07T01:53:06.979Z ORB1280 180 15 130 1982-06-09T01:14:01.423Z 1982-06-09T01:49:37.423Z ORB1281 96 15 130 1982-06-09T01:15:56.556Z 1982-06-09T01:34:56.556Z ORB1282 178 15 130 1982-06-11T01:14:40.280Z 1982-06-11T01:53:04.280Z ORB1283 96 15 130 1982-06-11T01:17:36.592Z 1982-06-11T01:44:24.592Z ORB1285 169 15 130 1982-06-13T01:11:30.967Z 1982-06-13T01:44:54.967Z ORB1286 66 15 130 1982-06-15T01:10:05.018Z 1982-06-15T01:30:39.709Z ORB1287 2 15 130 1982-06-15T01:18:39.619Z 1982-06-15T01:30:39.619Z ORB1288 108 15 130 1982-06-17T01:16:50.878Z 1982-06-17T01:38:14.878Z ORB1290 32 15 130 1982-06-19T01:12:39.009Z 1982-06-19T01:41:03.009Z ORB1291 102 15 130 1982-06-19T01:09:15.853Z 1982-06-19T01:38:15.853Z ORB1292 231 15 130 1982-06-21T01:07:29.193Z 1982-06-21T01:53:41.193Z ORB1293 232 15 130 1982-06-21T01:07:19.012Z 1982-06-21T01:54:19.012Z ORB1294 202 15 130 1982-06-23T01:06:45.288Z 1982-06-23T01:48:09.288Z ORB1295 115 15 130 1982-06-23T01:16:00.002Z 1982-06-23T01:38:48.002Z ORB1296 232 15 130 1982-06-25T01:06:39.131Z 1982-06-25T01:54:39.131Z ORB1297 217 15 130 1982-06-25T01:07:18.650Z 1982-06-25T01:50:30.650Z ORB1298 241 15 130 1982-06-27T01:06:46.535Z 1982-06-27T01:54:46.535Z ORB1299 219 15 130 1982-06-27T01:07:38.758Z 1982-06-27T01:52:14.758Z 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.