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 ---------------------------------------------------------------------------- ORB0200 175 15 130 1979-06-22T21:53:38.208Z 1979-06-22T22:28:38.208Z ORB0202 131 15 130 1979-06-24T21:57:30.312Z 1979-06-24T22:23:30.312Z ORB0204 99 15 130 1979-06-26T21:59:33.840Z 1979-06-26T22:19:09.840Z ORB0205 135 15 130 1979-06-27T21:54:53.816Z 1979-06-27T22:21:29.816Z ORB0206 170 15 130 1979-06-28T22:01:53.816Z 1979-06-28T22:36:53.816Z ORB0207 108 15 130 1979-06-29T22:00:45.816Z 1979-06-29T22:22:45.816Z ORB0208 173 15 130 1979-06-30T22:02:06.728Z 1979-06-30T22:36:30.728Z ORB0209 210 15 130 1979-07-01T21:58:09.128Z 1979-07-01T22:40:21.128Z ORB0210 62 15 130 1979-07-02T21:54:30.064Z 1979-07-02T22:06:42.064Z ORB0211 164 15 130 1979-07-03T21:56:09.696Z 1979-07-03T22:28:57.696Z ORB0212 189 15 130 1979-07-04T21:51:56.448Z 1979-07-04T22:29:32.448Z ORB0213 159 15 130 1979-07-05T21:59:02.768Z 1979-07-05T22:30:38.768Z ORB0214 154 15 130 1979-07-06T21:51:56.712Z 1979-07-06T22:22:32.712Z ORB0215 132 15 130 1979-07-07T21:56:36.512Z 1979-07-07T22:22:48.512Z ORB0216 169 15 130 1979-07-08T21:51:40.096Z 1979-07-08T22:25:16.096Z ORB0217 2 15 130 1979-07-09T22:10:50.816Z 1979-07-09T22:11:02.816Z ORB0218 57 15 130 1979-07-10T22:08:08.920Z 1979-07-10T22:20:20.920Z ORB0219 188 15 130 1979-07-11T21:59:58.224Z 1979-07-11T22:39:58.224Z ORB0220 229 15 130 1979-07-12T21:50:46.984Z 1979-07-12T22:36:22.984Z ORB0221 147 15 130 1979-07-13T21:50:46.664Z 1979-07-13T22:19:58.664Z ORB0222 169 15 130 1979-07-14T21:55:44.640Z 1979-07-14T22:30:32.640Z ORB0223 193 15 130 1979-07-15T21:50:37.544Z 1979-07-15T22:29:01.544Z ORB0224 211 15 130 1979-07-16T21:48:00.504Z 1979-07-16T22:30:00.504Z ORB0225 61 15 130 1979-07-17T21:58:53.872Z 1979-07-17T22:21:17.872Z ORB0226 137 15 130 1979-07-18T21:56:52.712Z 1979-07-18T22:24:04.712Z ORB0227 102 15 130 1979-07-19T21:57:21.088Z 1979-07-19T22:17:33.088Z ORB0228 142 15 130 1979-07-20T22:00:18.136Z 1979-07-20T22:28:30.136Z ORB0229 158 15 130 1979-07-21T21:41:57.056Z 1979-07-21T22:13:33.056Z ORB0230 225 15 130 1979-07-22T21:40:40.408Z 1979-07-22T22:25:28.408Z ORB0231 197 15 130 1979-07-23T21:40:52.128Z 1979-07-23T22:20:04.128Z ORB0232 163 15 130 1979-07-24T21:41:45.072Z 1979-07-24T22:14:09.072Z ORB0233 64 15 130 1979-07-25T21:49:35.368Z 1979-07-25T22:12:35.368Z ORB0234 158 15 130 1979-07-26T21:48:17.704Z 1979-07-26T22:25:17.704Z ORB0235 1 15 130 1979-07-27T22:26:17.584Z 1979-07-27T22:26:17.584Z ORB0236 173 15 130 1979-07-28T21:45:20.496Z 1979-07-28T22:20:44.496Z ORB0237 199 15 130 1979-07-29T21:47:14.944Z 1979-07-29T22:26:50.944Z ORB0238 170 15 130 1979-07-30T21:48:38.784Z 1979-07-30T22:23:26.784Z ORB0239 195 15 130 1979-07-31T21:50:48.608Z 1979-07-31T22:29:24.608Z ORB0240 234 15 130 1979-08-01T21:51:28.832Z 1979-08-01T22:38:04.832Z ORB0241 39 15 130 1979-08-02T22:07:44.016Z 1979-08-02T22:25:56.016Z ORB0242 161 15 130 1979-08-03T21:53:54.016Z 1979-08-03T22:25:54.016Z ORB0243 154 15 130 1979-08-04T21:57:11.328Z 1979-08-04T22:27:47.328Z ORB0244 192 15 130 1979-08-05T21:56:00.248Z 1979-08-05T22:34:12.248Z ORB0245 118 15 130 1979-08-06T22:08:11.352Z 1979-08-06T22:31:35.352Z ORB0246 132 15 130 1979-08-07T22:05:41.928Z 1979-08-07T22:32:17.928Z ORB0247 174 15 130 1979-08-08T22:00:10.432Z 1979-08-08T22:36:10.432Z ORB0248 175 15 130 1979-08-09T22:00:34.152Z 1979-08-09T22:35:22.152Z ORB0251 114 15 130 1979-08-12T22:02:13.520Z 1979-08-12T22:38:49.520Z ORB0283 21 15 130 1979-09-13T22:41:53.080Z 1979-09-13T22:46:05.080Z ORB0285 57 15 130 1979-09-15T22:20:45.904Z 1979-09-15T22:50:21.904Z ORB0287 82 15 130 1979-09-17T23:02:11.520Z 1979-09-17T23:22:47.520Z ORB0288 39 15 130 1979-09-18T23:10:48.616Z 1979-09-18T23:18:48.616Z ORB0289 67 15 130 1979-09-19T23:03:51.248Z 1979-09-19T23:33:03.248Z ORB0290 91 15 130 1979-09-20T23:32:45.352Z 1979-09-20T23:51:21.352Z ORB0291 34 15 130 1979-09-21T23:40:27.032Z 1979-09-21T23:47:03.032Z ORB0292 35 15 130 1979-09-22T23:48:32.384Z 1979-09-22T23:56:20.384Z ORB0293 1 15 130 1979-09-23T23:43:49.856Z 1979-09-23T23:43:49.856Z ORB0294 90 15 130 1979-09-25T00:08:43.318Z 1979-09-25T00:29:07.318Z ORB0295 91 15 130 1979-09-26T00:10:48.872Z 1979-09-26T00:33:24.872Z ORB0296 130 15 130 1979-09-27T00:22:13.686Z 1979-09-27T00:51:37.686Z ORB0297 96 15 130 1979-09-28T00:17:45.913Z 1979-09-28T00:53:21.913Z ORB0298 93 15 130 1979-09-29T00:40:51.066Z 1979-09-29T01:00:27.066Z ORB0299 101 15 130 1979-09-30T00:48:43.289Z 1979-09-30T01:11:43.289Z 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.