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
----------------------------------------------------------------------------
ORB0500 246 15 130 1980-04-18T10:31:02.696Z 1980-04-18T11:20:02.696Z
ORB0501 216 15 130 1980-04-19T10:30:05.472Z 1980-04-19T11:13:05.472Z
ORB0502 213 15 130 1980-04-20T10:28:32.020Z 1980-04-20T11:10:56.020Z
ORB0503 204 15 130 1980-04-21T10:27:10.772Z 1980-04-21T11:07:46.772Z
ORB0504 192 15 130 1980-04-22T10:25:25.472Z 1980-04-22T11:03:49.472Z
ORB0505 210 15 130 1980-04-23T10:24:02.504Z 1980-04-23T11:05:50.504Z
ORB0506 230 15 130 1980-04-24T10:21:26.896Z 1980-04-24T11:07:14.896Z
ORB0507 200 15 130 1980-04-25T10:18:37.352Z 1980-04-25T10:59:01.352Z
ORB0508 198 15 130 1980-04-26T10:16:46.960Z 1980-04-26T10:56:22.960Z
ORB0509 227 15 130 1980-04-27T10:13:19.440Z 1980-04-27T10:58:31.440Z
ORB0510 9 15 130 1980-04-28T10:23:27.472Z 1980-04-28T10:53:27.472Z
ORB0511 125 15 130 1980-04-29T10:24:11.460Z 1980-04-29T10:52:35.460Z
ORB0512 209 15 130 1980-04-30T10:05:16.792Z 1980-04-30T10:52:04.792Z
ORB0513 202 15 130 1980-05-01T10:02:04.576Z 1980-05-01T10:42:16.576Z
ORB0514 209 15 130 1980-05-02T09:57:24.296Z 1980-05-02T10:40:00.296Z
ORB0515 196 15 130 1980-05-03T09:53:30.896Z 1980-05-03T10:32:30.896Z
ORB0516 224 15 130 1980-05-04T09:49:49.068Z 1980-05-04T10:34:37.068Z
ORB0517 197 15 130 1980-05-05T09:47:19.328Z 1980-05-05T10:26:31.328Z
ORB0519 197 15 130 1980-05-07T09:37:54.104Z 1980-05-07T10:17:06.104Z
ORB0520 184 15 130 1980-05-08T09:33:11.776Z 1980-05-08T10:09:47.776Z
ORB0521 160 15 130 1980-05-09T09:27:51.152Z 1980-05-09T09:59:39.152Z
ORB0522 214 15 130 1980-05-10T09:23:17.428Z 1980-05-10T10:06:17.428Z
ORB0523 240 15 130 1980-05-11T09:18:19.252Z 1980-05-11T10:07:19.252Z
ORB0524 212 15 130 1980-05-12T09:12:55.782Z 1980-05-12T09:55:07.780Z
ORB0525 190 15 130 1980-05-13T09:07:55.800Z 1980-05-13T09:45:43.800Z
ORB0526 165 15 130 1980-05-14T09:04:55.882Z 1980-05-14T09:38:31.880Z
ORB0527 194 15 130 1980-05-15T09:03:57.912Z 1980-05-15T09:42:33.912Z
ORB0528 207 15 130 1980-05-16T09:05:51.822Z 1980-05-16T09:47:03.820Z
ORB0529 169 15 130 1980-05-17T09:07:43.188Z 1980-05-17T09:41:19.188Z
ORB0530 231 15 130 1980-05-18T09:09:09.074Z 1980-05-18T09:55:09.076Z
ORB0531 203 15 130 1980-05-19T09:08:21.822Z 1980-05-19T09:48:45.820Z
ORB0532 147 15 130 1980-05-20T09:22:08.540Z 1980-05-20T09:51:20.540Z
ORB0533 207 15 130 1980-05-21T09:11:52.628Z 1980-05-21T09:53:04.628Z
ORB0534 222 15 130 1980-05-22T09:16:22.720Z 1980-05-22T10:00:34.720Z
ORB0535 188 15 130 1980-05-23T09:22:40.188Z 1980-05-23T10:03:16.188Z
ORB0537 199 15 130 1980-05-25T09:36:00.028Z 1980-05-25T10:15:36.028Z
ORB0538 216 15 130 1980-05-26T09:45:14.716Z 1980-05-26T10:28:14.716Z
ORB0539 204 15 130 1980-05-27T09:56:28.508Z 1980-05-27T10:37:04.508Z
ORB0540 136 15 130 1980-05-28T10:06:17.540Z 1980-05-28T10:33:17.540Z
ORB0541 239 15 130 1980-05-29T10:00:41.664Z 1980-05-29T10:48:17.664Z
ORB0543 120 15 130 1980-05-31T10:27:51.492Z 1980-05-31T10:51:39.492Z
ORB0544 113 15 130 1980-06-01T10:33:13.308Z 1980-06-01T10:55:37.308Z
ORB0545 171 15 130 1980-06-02T10:26:22.404Z 1980-06-02T11:00:22.404Z
ORB0546 111 15 130 1980-06-03T10:46:18.776Z 1980-06-03T11:08:18.776Z
ORB0547 154 15 130 1980-06-04T10:52:26.168Z 1980-06-04T11:23:02.168Z
ORB0548 162 15 130 1980-06-05T10:43:44.576Z 1980-06-05T11:16:08.576Z
ORB0549 99 15 130 1980-06-06T11:03:14.228Z 1980-06-06T11:23:14.228Z
ORB0550 138 15 130 1980-06-07T11:02:43.008Z 1980-06-07T11:30:07.008Z
ORB0551 154 15 130 1980-06-08T11:04:35.072Z 1980-06-08T11:35:11.072Z
ORB0552 201 15 130 1980-06-09T11:16:38.220Z 1980-06-09T11:56:38.220Z
ORB0553 104 15 130 1980-06-10T11:23:04.556Z 1980-06-10T11:44:04.556Z
ORB0554 118 15 130 1980-06-11T11:31:18.124Z 1980-06-11T11:54:42.124Z
ORB0555 196 15 130 1980-06-12T11:26:31.004Z 1980-06-12T12:05:31.004Z
ORB0556 156 15 130 1980-06-13T11:42:18.916Z 1980-06-13T12:13:18.916Z
ORB0557 110 15 130 1980-06-14T11:53:29.652Z 1980-06-14T12:16:53.652Z
ORB0558 85 15 130 1980-06-15T11:54:27.516Z 1980-06-15T12:19:39.516Z
ORB0559 90 15 130 1980-06-16T12:03:00.308Z 1980-06-16T12:22:12.308Z
ORB0560 135 15 130 1980-06-17T12:00:56.008Z 1980-06-17T12:27:56.008Z
ORB0561 152 15 130 1980-06-18T12:06:51.048Z 1980-06-18T12:38:27.048Z
ORB0562 100 15 130 1980-06-19T12:25:21.352Z 1980-06-19T12:45:21.352Z
ORB0563 165 15 130 1980-06-20T12:28:38.708Z 1980-06-20T13:01:50.708Z
ORB0564 143 15 130 1980-06-21T12:27:42.896Z 1980-06-21T12:56:06.896Z
ORB0565 136 15 130 1980-06-22T12:32:22.116Z 1980-06-22T12:59:22.116Z
ORB0566 53 15 130 1980-06-23T12:52:24.008Z 1980-06-23T13:03:36.008Z
ORB0567 92 15 130 1980-06-24T12:52:37.012Z 1980-06-24T13:10:49.012Z
ORB0568 155 15 130 1980-06-25T12:47:00.292Z 1980-06-25T13:17:48.292Z
ORB0569 144 15 130 1980-06-26T12:56:56.812Z 1980-06-26T13:25:32.812Z
ORB0570 63 15 130 1980-06-27T13:03:14.724Z 1980-06-27T13:27:38.724Z
ORB0571 98 15 130 1980-06-28T13:13:04.264Z 1980-06-28T13:32:40.264Z
ORB0572 241 15 130 1980-06-29T13:05:38.328Z 1980-06-29T13:53:38.328Z
ORB0573 58 15 130 1980-06-30T13:24:58.356Z 1980-06-30T13:36:22.356Z
ORB0574 152 15 130 1980-07-01T13:34:16.076Z 1980-07-01T14:04:28.076Z
ORB0575 124 15 130 1980-07-02T13:28:54.524Z 1980-07-02T13:53:30.524Z
ORB0576 116 15 130 1980-07-03T13:36:29.268Z 1980-07-03T13:59:29.268Z
ORB0577 210 15 130 1980-07-04T13:39:36.352Z 1980-07-04T14:21:24.352Z
ORB0578 44 15 130 1980-07-05T13:58:49.128Z 1980-07-05T14:07:25.128Z
ORB0579 160 15 130 1980-07-06T13:58:44.816Z 1980-07-06T14:30:32.816Z
ORB0580 133 15 130 1980-07-07T13:59:08.968Z 1980-07-07T14:25:32.968Z
ORB0581 101 15 130 1980-07-08T14:10:24.540Z 1980-07-08T14:30:24.540Z
ORB0582 183 15 130 1980-07-09T14:09:30.372Z 1980-07-09T14:45:54.372Z
ORB0583 144 15 130 1980-07-10T14:17:13.724Z 1980-07-10T14:46:01.724Z
ORB0584 165 15 130 1980-07-11T14:19:45.952Z 1980-07-11T14:52:33.952Z
ORB0585 162 15 130 1980-07-12T14:26:20.264Z 1980-07-12T14:58:56.264Z
ORB0586 175 15 130 1980-07-13T14:28:43.648Z 1980-07-13T15:03:31.648Z
ORB0587 144 15 130 1980-07-14T14:27:46.092Z 1980-07-14T15:03:10.092Z
ORB0588 165 15 130 1980-07-15T14:23:51.376Z 1980-07-15T14:56:39.376Z
ORB0589 133 15 130 1980-07-16T14:43:36.828Z 1980-07-16T15:10:00.828Z
ORB0590 125 15 130 1980-07-17T14:45:15.152Z 1980-07-17T15:11:39.152Z
ORB0591 159 15 130 1980-07-18T14:36:45.880Z 1980-07-18T15:08:21.880Z
ORB0592 155 15 130 1980-07-19T14:50:46.492Z 1980-07-19T15:21:46.492Z
ORB0593 201 15 130 1980-07-20T14:40:17.724Z 1980-07-20T15:20:17.724Z
ORB0594 147 15 130 1980-07-21T14:57:44.316Z 1980-07-21T15:26:56.316Z
ORB0595 157 15 130 1980-07-22T14:48:42.624Z 1980-07-22T15:19:54.624Z
ORB0596 147 15 130 1980-07-23T14:58:49.000Z 1980-07-23T15:28:13.000Z
ORB0597 153 15 130 1980-07-24T14:50:16.720Z 1980-07-24T15:21:28.720Z
ORB0598 180 15 130 1980-07-25T15:03:18.348Z 1980-07-25T15:39:18.348Z
ORB0599 106 15 130 1980-07-26T15:08:17.832Z 1980-07-26T15:29:17.832Z
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.