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 ---------------------------------------------------------------------------- ORB0300 58 15 130 1979-10-01T00:59:10.894Z 1979-10-01T01:27:34.894Z ORB0301 61 15 130 1979-10-02T01:07:13.871Z 1979-10-02T01:20:13.871Z ORB0302 110 15 130 1979-10-03T01:11:16.644Z 1979-10-03T01:34:16.644Z ORB0303 71 15 130 1979-10-04T01:18:54.014Z 1979-10-04T01:43:30.014Z ORB0304 174 15 130 1979-10-05T01:18:54.290Z 1979-10-05T01:57:42.290Z ORB0305 134 15 130 1979-10-06T01:18:35.863Z 1979-10-06T01:55:23.863Z ORB0306 72 15 130 1979-10-07T01:40:06.361Z 1979-10-07T01:54:54.361Z ORB0307 163 15 130 1979-10-08T01:33:22.383Z 1979-10-08T02:09:34.383Z ORB0308 185 15 130 1979-10-09T01:39:37.130Z 1979-10-09T02:20:25.130Z ORB0309 123 15 130 1979-10-10T02:01:50.932Z 1979-10-10T02:27:14.932Z ORB0310 105 15 130 1979-10-11T02:06:59.296Z 1979-10-11T02:30:23.296Z ORB0311 60 15 130 1979-10-12T02:17:35.852Z 1979-10-12T02:39:59.852Z ORB0312 137 15 130 1979-10-13T02:17:35.235Z 1979-10-13T02:48:47.235Z ORB0313 150 15 130 1979-10-14T02:22:20.923Z 1979-10-14T02:54:08.923Z ORB0314 172 15 130 1979-10-15T02:25:05.113Z 1979-10-15T03:04:29.113Z ORB0315 119 15 130 1979-10-16T02:39:36.012Z 1979-10-16T03:06:00.012Z ORB0316 70 15 130 1979-10-17T02:47:17.727Z 1979-10-17T03:07:05.727Z ORB0318 125 15 130 1979-10-19T02:52:02.143Z 1979-10-19T03:20:02.143Z ORB0319 140 15 130 1979-10-20T03:01:16.722Z 1979-10-20T03:36:16.722Z ORB0320 172 15 130 1979-10-21T02:57:17.687Z 1979-10-21T03:35:29.687Z ORB0321 110 15 130 1979-10-22T03:17:05.768Z 1979-10-22T03:42:41.768Z ORB0322 159 15 130 1979-10-23T03:21:04.741Z 1979-10-23T03:57:40.741Z ORB0323 104 15 130 1979-10-24T03:28:26.877Z 1979-10-24T03:51:38.877Z ORB0324 77 15 130 1979-10-25T03:37:36.257Z 1979-10-25T03:53:24.257Z ORB0325 48 15 130 1979-10-26T03:46:44.863Z 1979-10-26T04:05:20.863Z ORB0326 3 15 130 1979-10-27T03:48:04.709Z 1979-10-27T03:48:28.709Z ORB0327 40 15 130 1979-10-28T04:16:47.507Z 1979-10-28T04:24:59.507Z ORB0328 169 15 130 1979-10-29T03:46:41.306Z 1979-10-29T04:22:41.306Z ORB0329 115 15 130 1979-10-30T04:07:46.630Z 1979-10-30T04:31:22.630Z ORB0330 2 15 130 1979-10-31T04:12:38.933Z 1979-10-31T04:40:02.934Z ORB0331 173 15 130 1979-11-01T04:03:54.372Z 1979-11-01T04:45:18.372Z ORB0332 125 15 130 1979-11-02T04:26:31.800Z 1979-11-02T04:53:19.800Z ORB0333 71 15 130 1979-11-03T04:32:09.192Z 1979-11-03T04:52:33.192Z ORB0334 132 15 130 1979-11-04T04:41:20.874Z 1979-11-04T05:09:56.874Z ORB0335 93 15 130 1979-11-05T04:39:31.597Z 1979-11-05T05:00:07.598Z ORB0336 90 15 130 1979-11-06T04:46:53.356Z 1979-11-06T05:20:53.356Z ORB0337 86 15 130 1979-11-07T04:53:25.394Z 1979-11-07T05:16:01.394Z ORB0338 100 15 130 1979-11-08T04:56:44.528Z 1979-11-08T05:17:56.528Z ORB0339 98 15 130 1979-11-09T05:08:02.076Z 1979-11-09T05:31:26.076Z ORB0340 96 15 130 1979-11-10T05:10:06.128Z 1979-11-10T05:33:06.128Z ORB0341 100 15 130 1979-11-11T05:14:07.212Z 1979-11-11T05:35:31.212Z ORB0342 1 15 130 1979-11-12T05:09:18.530Z 1979-11-12T05:09:18.530Z ORB0343 127 15 130 1979-11-13T05:19:51.708Z 1979-11-13T05:51:27.708Z ORB0344 146 15 130 1979-11-14T05:23:22.658Z 1979-11-14T05:56:34.658Z ORB0345 1 15 130 1979-11-15T05:29:13.520Z 1979-11-15T05:29:13.520Z ORB0346 74 15 130 1979-11-16T05:49:14.976Z 1979-11-16T06:03:50.976Z ORB0347 75 15 130 1979-11-17T05:53:36.022Z 1979-11-17T06:09:36.022Z ORB0348 133 15 130 1979-11-18T05:51:41.614Z 1979-11-18T06:22:29.614Z ORB0349 102 15 130 1979-11-19T06:02:43.636Z 1979-11-19T06:24:55.636Z ORB0350 90 15 130 1979-11-20T06:10:17.538Z 1979-11-20T06:30:41.538Z ORB0351 107 15 130 1979-11-21T06:11:47.370Z 1979-11-21T06:34:35.370Z ORB0352 121 15 130 1979-11-22T06:11:24.092Z 1979-11-22T06:37:12.092Z ORB0353 55 15 130 1979-11-23T06:29:07.230Z 1979-11-23T06:41:07.230Z ORB0354 145 15 130 1979-11-24T06:31:32.014Z 1979-11-24T07:01:08.014Z ORB0355 112 15 130 1979-11-25T06:22:14.538Z 1979-11-25T06:52:26.538Z ORB0359 120 15 130 1979-11-29T06:48:46.784Z 1979-11-29T07:13:10.784Z ORB0360 199 15 130 1979-11-30T06:40:59.832Z 1979-11-30T07:21:23.832Z ORB0361 149 15 130 1979-12-01T06:56:49.296Z 1979-12-01T07:27:13.296Z ORB0362 124 15 130 1979-12-02T07:01:12.938Z 1979-12-02T07:37:24.938Z ORB0363 119 15 130 1979-12-03T07:05:12.096Z 1979-12-03T07:29:36.096Z ORB0364 122 15 130 1979-12-04T07:03:37.702Z 1979-12-04T07:36:13.702Z ORB0365 162 15 130 1979-12-05T07:02:53.002Z 1979-12-05T07:35:29.002Z ORB0366 163 15 130 1979-12-06T07:05:23.696Z 1979-12-06T07:38:11.696Z ORB0367 192 15 130 1979-12-07T07:05:09.880Z 1979-12-07T07:44:33.880Z ORB0368 67 15 130 1979-12-08T07:21:25.072Z 1979-12-08T07:39:37.072Z ORB0369 135 15 130 1979-12-09T07:23:35.496Z 1979-12-09T07:50:59.496Z ORB0370 146 15 130 1979-12-10T07:19:29.326Z 1979-12-10T07:48:29.326Z ORB0371 162 15 130 1979-12-11T07:28:31.664Z 1979-12-11T08:00:43.664Z ORB0372 128 15 130 1979-12-12T07:21:23.276Z 1979-12-12T07:46:47.276Z ORB0373 194 15 130 1979-12-13T07:25:34.874Z 1979-12-13T08:04:10.874Z ORB0374 157 15 130 1979-12-14T07:34:30.580Z 1979-12-14T08:05:54.580Z ORB0375 131 15 130 1979-12-15T07:38:26.266Z 1979-12-15T08:04:26.266Z ORB0376 162 15 130 1979-12-16T07:22:25.958Z 1979-12-16T07:55:01.958Z ORB0377 123 15 130 1979-12-17T07:38:54.818Z 1979-12-17T08:03:18.818Z ORB0378 134 15 130 1979-12-18T07:39:55.432Z 1979-12-18T08:06:43.432Z ORB0379 149 15 130 1979-12-19T07:37:48.254Z 1979-12-19T08:08:12.254Z ORB0380 48 15 130 1979-12-20T07:40:59.878Z 1979-12-20T07:51:47.878Z ORB0381 164 15 130 1979-12-21T07:37:13.688Z 1979-12-21T08:09:49.688Z ORB0382 113 15 130 1979-12-22T07:29:06.732Z 1979-12-22T07:51:30.732Z ORB0383 239 15 130 1979-12-23T07:19:42.180Z 1979-12-23T08:07:18.180Z ORB0384 188 15 130 1979-12-24T07:25:01.652Z 1979-12-24T08:02:25.652Z ORB0385 132 15 130 1979-12-25T07:38:06.642Z 1979-12-25T08:06:54.642Z ORB0386 143 15 130 1979-12-26T07:33:57.586Z 1979-12-26T08:03:21.586Z ORB0387 118 15 130 1979-12-27T07:27:10.932Z 1979-12-27T07:50:58.932Z ORB0388 143 15 130 1979-12-28T07:18:45.614Z 1979-12-28T07:47:09.614Z ORB0389 170 15 130 1979-12-29T07:13:17.082Z 1979-12-29T07:47:17.082Z ORB0390 118 15 130 1979-12-30T07:25:59.610Z 1979-12-30T07:49:23.610Z ORB0391 102 15 130 1979-12-31T07:24:46.388Z 1979-12-31T07:44:58.388Z ORB0392 160 15 130 1980-01-01T07:20:26.616Z 1980-01-01T07:52:26.616Z ORB0393 78 15 130 1980-01-02T07:16:04.130Z 1980-01-02T07:31:28.130Z ORB0394 217 15 130 1980-01-03T07:00:26.760Z 1980-01-03T07:43:50.760Z ORB0395 207 15 130 1980-01-04T06:56:35.600Z 1980-01-04T07:37:47.600Z ORB0396 220 15 130 1980-01-05T06:55:31.022Z 1980-01-05T07:39:19.022Z ORB0398 117 15 130 1980-01-07T06:56:39.710Z 1980-01-07T07:19:51.710Z ORB0399 108 15 130 1980-01-08T06:45:58.440Z 1980-01-08T07:07:22.440Z 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.