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 ---------------------------------------------------------------------------- ORB1300 238 15 130 1982-06-29T01:06:54.689Z 1982-06-29T01:55:18.689Z ORB1301 199 15 130 1982-06-29T01:06:59.626Z 1982-06-29T01:55:11.626Z ORB1302 87 15 130 1982-07-01T01:15:28.816Z 1982-07-01T01:32:52.816Z ORB1303 215 15 130 1982-07-01T01:09:33.230Z 1982-07-01T01:54:09.230Z ORB1304 231 15 130 1982-07-03T01:07:38.836Z 1982-07-03T01:55:26.836Z ORB1305 144 15 130 1982-07-03T01:07:44.592Z 1982-07-03T01:36:20.592Z ORB1306 224 15 130 1982-07-04T01:08:14.496Z 1982-07-04T01:52:50.496Z ORB1307 193 15 130 1982-07-05T01:08:44.527Z 1982-07-05T01:47:08.527Z ORB1308 231 15 130 1982-07-06T01:08:14.058Z 1982-07-06T01:54:14.058Z ORB1309 122 15 130 1982-07-07T01:16:08.284Z 1982-07-07T01:40:20.284Z ORB1310 202 15 130 1982-07-09T01:08:14.542Z 1982-07-09T01:48:50.542Z ORB1313 236 15 130 1982-07-11T01:08:21.073Z 1982-07-11T01:55:21.073Z ORB1314 207 15 130 1982-07-13T01:08:27.021Z 1982-07-13T01:49:39.021Z ORB1315 236 15 130 1982-07-13T01:08:44.026Z 1982-07-13T01:55:56.026Z ORB1316 111 15 130 1982-07-15T01:17:01.527Z 1982-07-15T01:39:01.527Z ORB1317 228 15 130 1982-07-15T01:08:42.794Z 1982-07-15T01:54:42.794Z ORB1318 235 15 130 1982-07-16T01:08:59.794Z 1982-07-16T01:55:47.794Z ORB1319 239 15 130 1982-07-17T01:09:16.499Z 1982-07-17T01:56:52.499Z ORB1320 227 15 130 1982-07-19T01:09:32.877Z 1982-07-19T01:54:44.877Z ORB1322 219 15 130 1982-07-21T01:09:16.339Z 1982-07-21T01:56:16.339Z ORB1323 125 15 130 1982-07-21T01:17:31.570Z 1982-07-21T01:42:19.570Z ORB1324 211 15 130 1982-07-22T01:09:22.368Z 1982-07-22T01:55:10.368Z ORB1325 203 15 130 1982-07-23T01:09:24.709Z 1982-07-23T01:50:12.709Z ORB1326 169 15 130 1982-07-24T01:23:02.570Z 1982-07-24T01:56:38.570Z ORB1327 120 15 130 1982-07-25T01:17:51.931Z 1982-07-25T01:41:39.931Z ORB1328 238 15 130 1982-07-27T01:09:28.772Z 1982-07-27T01:56:52.772Z ORB1329 218 15 130 1982-07-27T01:09:17.076Z 1982-07-27T01:52:41.076Z ORB1330 108 15 130 1982-07-29T01:17:40.826Z 1982-07-29T01:39:28.826Z ORB1331 239 15 130 1982-07-29T01:09:16.007Z 1982-07-29T01:57:16.007Z ORB1332 191 15 130 1982-07-31T01:09:26.608Z 1982-07-31T01:47:26.608Z ORB1333 238 15 130 1982-07-31T01:09:24.618Z 1982-07-31T01:56:48.618Z ORB1334 222 15 130 1982-08-02T01:09:10.026Z 1982-08-02T01:53:22.026Z ORB1335 239 15 130 1982-08-02T01:09:06.828Z 1982-08-02T01:56:42.828Z ORB1336 241 15 130 1982-08-04T01:09:03.016Z 1982-08-04T01:57:03.016Z ORB1337 94 15 130 1982-08-04T01:18:10.589Z 1982-08-04T01:38:46.589Z ORB1338 221 15 130 1982-08-06T01:08:53.545Z 1982-08-06T01:53:41.545Z ORB1339 204 15 130 1982-08-06T01:09:11.885Z 1982-08-06T01:49:59.885Z ORB1340 235 15 130 1982-08-08T01:08:41.612Z 1982-08-08T01:55:29.612Z ORB1341 235 15 130 1982-08-08T01:08:34.730Z 1982-08-08T01:55:22.730Z ORB1342 221 15 130 1982-08-10T01:09:15.246Z 1982-08-10T01:53:15.246Z ORB1343 217 15 130 1982-08-10T01:08:19.169Z 1982-08-10T01:51:31.169Z ORB1345 224 15 130 1982-08-12T01:08:01.279Z 1982-08-12T01:53:13.279Z ORB1346 234 15 130 1982-08-14T01:08:15.493Z 1982-08-14T01:54:51.493Z ORB1347 241 15 130 1982-08-14T01:07:41.168Z 1982-08-14T01:55:41.168Z ORB1348 199 15 130 1982-08-16T01:07:27.678Z 1982-08-16T01:47:15.678Z ORB1349 212 15 130 1982-08-16T01:07:16.048Z 1982-08-16T01:49:28.048Z ORB1350 14 15 130 1982-08-18T01:09:51.936Z 1982-08-18T01:12:27.936Z ORB1351 114 15 130 1982-08-18T01:15:51.367Z 1982-08-18T01:38:27.367Z ORB1352 219 15 130 1982-08-20T01:07:02.363Z 1982-08-20T01:52:14.363Z ORB1353 212 15 130 1982-08-20T01:06:24.952Z 1982-08-20T01:50:24.952Z ORB1354 129 15 130 1982-08-22T01:06:11.160Z 1982-08-22T01:39:35.160Z ORB1355 224 15 130 1982-08-22T01:06:33.015Z 1982-08-22T01:51:09.015Z ORB1356 155 15 130 1982-08-24T01:05:54.548Z 1982-08-24T01:37:06.548Z ORB1357 90 15 130 1982-08-24T01:13:39.649Z 1982-08-24T01:31:27.649Z ORB1358 111 15 130 1982-08-26T01:14:12.635Z 1982-08-26T01:37:00.635Z ORB1359 216 15 130 1982-08-26T01:05:09.392Z 1982-08-26T01:49:21.392Z ORB1360 166 15 130 1982-08-28T01:06:17.954Z 1982-08-28T01:46:53.954Z ORB1361 237 15 130 1982-08-28T01:04:38.356Z 1982-08-28T01:51:50.356Z ORB1362 232 15 130 1982-08-30T01:04:34.630Z 1982-08-30T01:50:46.630Z ORB1363 175 15 130 1982-08-30T01:03:54.813Z 1982-08-30T01:38:42.813Z ORB1364 119 15 130 1982-09-01T01:12:26.537Z 1982-09-01T01:36:02.537Z ORB1365 84 15 130 1982-09-01T01:12:10.607Z 1982-09-01T01:30:10.608Z ORB1366 222 15 130 1982-09-03T01:03:06.692Z 1982-09-03T01:47:42.692Z ORB1367 155 15 130 1982-09-03T01:04:14.826Z 1982-09-03T01:35:26.826Z ORB1368 160 15 130 1982-09-05T01:02:47.044Z 1982-09-05T01:34:47.044Z ORB1369 188 15 130 1982-09-05T01:10:43.382Z 1982-09-05T01:49:55.382Z ORB1370 213 15 130 1982-09-07T01:02:39.874Z 1982-09-07T01:47:15.874Z ORB1372 113 15 130 1982-09-09T01:10:33.457Z 1982-09-09T01:32:57.457Z ORB1373 87 15 130 1982-09-09T01:14:06.613Z 1982-09-09T01:32:06.613Z ORB1374 234 15 130 1982-09-11T01:01:16.056Z 1982-09-11T01:48:28.056Z ORB1375 158 15 130 1982-09-11T01:00:49.230Z 1982-09-11T01:32:13.230Z ORB1376 236 15 130 1982-09-12T01:00:35.039Z 1982-09-12T01:47:47.039Z ORB1377 212 15 130 1982-09-13T01:00:21.223Z 1982-09-13T01:43:45.223Z ORB1378 101 15 130 1982-09-15T01:11:19.811Z 1982-09-15T01:31:43.811Z ORB1379 97 15 130 1982-09-15T01:08:30.828Z 1982-09-15T01:27:42.828Z ORB1380 91 15 130 1982-09-17T01:07:06.300Z 1982-09-17T01:26:06.300Z ORB1381 233 15 130 1982-09-17T00:59:30.249Z 1982-09-17T01:45:54.249Z ORB1382 233 15 130 1982-09-18T00:59:18.698Z 1982-09-18T01:45:42.698Z ORB1383 237 15 130 1982-09-19T00:59:07.666Z 1982-09-19T01:46:19.666Z ORB1384 237 15 130 1982-09-20T00:58:57.172Z 1982-09-20T01:46:09.172Z ORB1385 96 15 130 1982-09-21T01:10:23.808Z 1982-09-21T01:30:59.808Z ORB1386 120 15 130 1982-09-22T01:07:14.509Z 1982-09-22T01:31:50.509Z ORB1387 149 15 130 1982-09-23T01:07:53.790Z 1982-09-23T01:41:05.790Z ORB1388 66 15 130 1982-09-24T01:14:57.659Z 1982-09-24T01:27:57.659Z ORB1389 236 15 130 1982-09-25T00:58:14.125Z 1982-09-25T01:45:14.125Z ORB1390 233 15 130 1982-09-26T00:58:07.195Z 1982-09-26T01:44:31.195Z ORB1391 239 15 130 1982-09-27T00:58:00.873Z 1982-09-27T01:45:36.873Z ORB1392 100 15 130 1982-09-28T01:06:43.162Z 1982-09-28T01:30:43.162Z ORB1393 70 15 130 1982-09-29T01:07:02.063Z 1982-09-29T01:23:02.063Z ORB1394 105 15 130 1982-09-30T01:13:57.574Z 1982-09-30T01:36:33.574Z ORB1395 93 15 130 1982-10-01T01:13:41.693Z 1982-10-01T01:32:53.693Z ORB1396 197 15 130 1982-10-02T00:57:38.413Z 1982-10-02T01:37:38.413Z ORB1397 191 15 130 1982-10-03T00:57:35.728Z 1982-10-03T01:37:35.728Z ORB1398 173 15 130 1982-10-04T00:57:33.629Z 1982-10-04T01:33:09.629Z ORB1399 232 15 130 1982-10-05T00:57:32.104Z 1982-10-05T01:45:32.104Z 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.