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 ---------------------------------------------------------------------------- ORB2200 188 15 130 1984-12-13T22:29:49.711Z 1984-12-13T23:07:13.711Z ORB2201 193 15 130 1984-12-14T22:29:30.576Z 1984-12-14T23:11:30.576Z ORB2202 184 15 130 1984-12-15T22:30:23.653Z 1984-12-15T23:06:59.653Z ORB2204 177 15 130 1984-12-17T22:28:46.308Z 1984-12-17T23:03:58.308Z ORB2205 78 15 130 1984-12-18T22:35:27.812Z 1984-12-18T22:50:51.812Z ORB2206 204 15 130 1984-12-19T22:30:57.404Z 1984-12-19T23:12:33.404Z ORB2208 151 15 130 1984-12-21T22:29:07.162Z 1984-12-21T23:00:19.162Z ORB2209 151 15 130 1984-12-22T22:29:49.864Z 1984-12-22T22:59:49.864Z ORB2210 208 15 130 1984-12-23T22:28:08.071Z 1984-12-23T23:09:32.071Z ORB2211 110 15 130 1984-12-24T22:38:26.210Z 1984-12-24T23:00:14.210Z ORB2212 131 15 130 1984-12-25T22:33:56.229Z 1984-12-25T22:59:56.229Z ORB2213 168 15 130 1984-12-26T22:27:50.097Z 1984-12-26T23:07:02.097Z ORB2216 165 15 130 1984-12-29T22:27:42.464Z 1984-12-29T23:00:30.464Z ORB2217 101 15 130 1984-12-30T22:33:35.403Z 1984-12-30T22:58:23.403Z ORB2218 90 15 130 1984-12-31T22:30:16.032Z 1984-12-31T22:48:04.032Z ORB2219 100 15 130 1985-01-01T22:29:08.323Z 1985-01-01T22:48:56.323Z ORB2221 166 15 130 1985-01-03T22:26:52.115Z 1985-01-03T23:03:04.115Z ORB2222 214 15 130 1985-01-04T22:26:55.253Z 1985-01-04T23:09:31.253Z ORB2223 158 15 130 1985-01-05T22:30:09.948Z 1985-01-05T23:01:33.948Z ORB2224 196 15 130 1985-01-06T22:28:00.193Z 1985-01-06T23:07:00.193Z ORB2226 163 15 130 1985-01-08T22:26:51.176Z 1985-01-08T22:59:15.176Z ORB2227 90 15 130 1985-01-09T22:35:03.884Z 1985-01-09T23:04:39.884Z ORB2228 117 15 130 1985-01-10T22:30:52.047Z 1985-01-10T22:54:04.047Z ORB2229 154 15 130 1985-01-11T22:33:51.648Z 1985-01-11T23:05:51.648Z ORB2231 195 15 130 1985-01-13T22:25:13.069Z 1985-01-13T23:04:01.069Z ORB2232 112 15 130 1985-01-14T22:36:58.904Z 1985-01-14T22:59:34.904Z ORB2234 74 15 130 1985-01-16T22:38:16.753Z 1985-01-16T22:53:52.753Z ORB2236 150 15 130 1985-01-18T22:29:32.142Z 1985-01-18T22:59:20.142Z ORB2237 138 15 130 1985-01-19T22:33:38.910Z 1985-01-19T23:01:14.910Z ORB2238 187 15 130 1985-01-20T22:23:09.061Z 1985-01-20T23:00:21.061Z ORB2239 172 15 130 1985-01-21T22:25:26.599Z 1985-01-21T23:00:26.599Z ORB2240 163 15 130 1985-01-22T22:25:31.530Z 1985-01-22T22:57:55.530Z ORB2241 204 15 130 1985-01-23T22:23:11.861Z 1985-01-23T23:05:23.861Z ORB2242 67 15 130 1985-01-24T22:32:27.601Z 1985-01-24T22:47:03.601Z ORB2243 110 15 130 1985-01-25T22:26:42.762Z 1985-01-25T22:48:30.762Z ORB2246 44 15 130 1985-01-28T22:30:48.914Z 1985-01-28T22:39:24.914Z ORB2247 84 15 130 1985-01-29T22:20:13.910Z 1985-01-29T22:36:49.910Z ORB2248 19 15 130 1985-01-30T22:28:38.412Z 1985-01-30T22:32:14.412Z ORB2249 31 15 130 1985-01-31T22:31:14.440Z 1985-01-31T22:37:26.440Z ORB2252 105 15 130 1985-02-03T22:19:35.929Z 1985-02-03T22:40:23.929Z ORB2254 64 15 130 1985-02-05T22:17:56.358Z 1985-02-05T22:30:32.358Z ORB2256 2 15 130 1985-02-07T22:27:27.351Z 1985-02-07T22:51:39.351Z ORB2257 52 15 130 1985-02-08T22:18:12.543Z 1985-02-08T22:28:24.543Z ORB2258 209 15 130 1985-02-09T22:19:09.519Z 1985-02-09T23:00:45.519Z ORB2259 61 15 130 1985-02-10T22:15:18.313Z 1985-02-10T22:27:18.313Z ORB2260 125 15 130 1985-02-11T22:18:14.958Z 1985-02-11T22:43:38.958Z ORB2261 137 15 130 1985-02-12T22:13:59.490Z 1985-02-12T22:41:35.490Z ORB2263 2 15 130 1985-02-14T22:16:28.354Z 1985-02-14T22:16:40.354Z ORB2264 8 15 130 1985-02-15T22:14:24.756Z 1985-02-15T22:33:24.756Z ORB2266 36 15 130 1985-02-17T22:11:41.679Z 1985-02-17T22:18:41.679Z ORB2268 6 15 130 1985-02-19T22:40:22.996Z 1985-02-19T22:41:22.996Z ORB2269 117 15 130 1985-02-20T22:17:31.889Z 1985-02-20T22:43:43.889Z ORB2270 1 15 130 1985-02-21T22:33:04.983Z 1985-02-21T22:33:04.983Z ORB2272 78 15 130 1985-02-23T22:08:59.910Z 1985-02-23T22:24:23.910Z ORB2276 1 15 130 1985-02-27T22:09:29.592Z 1985-02-27T22:09:29.592Z ORB2277 2 15 130 1985-02-28T22:10:28.981Z 1985-02-28T22:22:40.981Z ORB2278 2 15 130 1985-03-01T22:08:04.810Z 1985-03-01T22:23:16.810Z ORB2279 89 15 130 1985-03-02T22:06:05.104Z 1985-03-02T22:23:41.104Z ORB2282 3 15 130 1985-03-05T22:06:32.995Z 1985-03-05T22:12:08.995Z ORB2285 1 15 130 1985-03-08T22:07:34.353Z 1985-03-08T22:07:34.353Z ORB2286 2 15 130 1985-03-09T22:08:36.228Z 1985-03-09T22:17:00.228Z ORB2287 1 15 130 1985-03-10T22:18:26.703Z 1985-03-10T22:18:26.703Z ORB2288 39 15 130 1985-03-11T22:23:29.785Z 1985-03-11T22:31:53.785Z ORB2291 52 15 130 1985-03-14T22:05:03.091Z 1985-03-14T22:24:03.091Z ORB2292 1 15 130 1985-03-15T22:27:08.137Z 1985-03-15T22:27:08.137Z ORB2293 2 15 130 1985-03-16T22:18:15.025Z 1985-03-16T22:27:39.025Z ORB2295 107 15 130 1985-03-18T22:22:29.174Z 1985-03-18T22:46:17.174Z ORB2296 13 15 130 1985-03-19T22:11:13.148Z 1985-03-19T22:27:37.148Z ORB2297 2 15 130 1985-03-20T22:27:21.710Z 1985-03-20T22:27:33.710Z ORB2298 48 15 130 1985-03-21T22:37:42.846Z 1985-03-21T22:48:06.846Z ORB2299 2 15 130 1985-03-22T22:16:40.546Z 1985-03-22T22:16:52.546Z 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.