PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT PUBLICATION_DATE = 2000-05-10 NOTE = "INFO.TXT describes the contents of this directory." END_OBJECT = TEXT END PVO Ion Mass Spectrometer high-resolution data are stored in single-orbit ASCII files. 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 (*.LBL). Columns in all data files: ======================================================= name type description ------------------------------------------------------- PVO TIME char 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 DWELL int Dwell time (time interval between samples, msec) DWELL = (TIME - UT)*1000/(n-1) BITS int Telemetry bit rate LAT float Venusian Latitude LON float Venusian Longitude ALT float Altitude SZA float Solar Zenith Angle SHA float Solar Hour Angle
MASS1 int Mass of Sample 1 DEN1 float Number density of Sample 1 MASS2 int Mass of Sample 2 DEN2 float Number density of Sample 2 . . . . . . . . . MASS55 int Mass of Sample 55 DEN55 float Number density of Sample 55 The values 999 and 9.9999e+04 are the missing data values for mass and density respectively. The value 99999.999 is the missing data value for the second-of-day part of the time column. Negative values in a density column indicate flagged (unreliable) data values. Data Files (.TAB extension) The high-resolution data files on this disk are ASCII table files, each having 118 columns and record length 953 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 ---------------------------------------------------------------------------- ORB3600 308 118 953 1988-10-14T02:52:26.712Z 1988-10-14T03:59:09.501Z ORB3601 1048 118 953 1988-10-15T01:59:44.970Z 1988-10-15T03:59:12.263Z ORB3602 1032 118 953 1988-10-16T01:59:40.734Z 1988-10-16T03:59:14.777Z ORB3603 1025 118 953 1988-10-17T01:59:36.250Z 1988-10-17T03:59:20.292Z ORB3604 1038 118 953 1988-10-18T02:00:02.763Z 1988-10-18T03:59:20.806Z ORB3605 932 118 953 1988-10-19T02:00:35.265Z 1988-10-19T03:50:26.305Z ORB3606 1008 118 953 1988-10-20T02:00:10.777Z 1988-10-20T03:59:19.070Z ORB3607 1030 118 953 1988-10-21T02:00:10.547Z 1988-10-21T03:59:23.591Z ORB3608 1004 118 953 1988-10-22T01:59:41.068Z 1988-10-22T03:59:20.360Z ORB3609 730 118 953 1988-10-23T02:00:43.839Z 1988-10-23T03:35:11.123Z ORB3610 965 118 953 1988-10-24T02:00:38.613Z 1988-10-24T03:59:21.654Z ORB3611 74 118 953 1988-10-25T02:53:06.112Z 1988-10-25T03:04:36.093Z ORB3612 919 118 953 1988-10-26T01:59:47.844Z 1988-10-26T03:50:35.885Z ORB3613 895 118 953 1988-10-27T01:59:48.367Z 1988-10-27T03:50:11.408Z ORB3614 75 118 953 1988-10-28T02:52:57.894Z 1988-10-28T03:04:37.611Z ORB3615 856 118 953 1988-10-29T01:59:43.417Z 1988-10-29T03:53:23.458Z ORB3616 878 118 953 1988-10-30T02:00:27.943Z 1988-10-30T04:09:08.991Z ORB3617 833 118 953 1988-10-31T02:00:22.470Z 1988-10-31T03:59:15.515Z ORB3618 891 118 953 1988-11-01T02:00:22.997Z 1988-11-01T03:59:18.290Z ORB3619 75 118 953 1988-11-02T02:52:56.768Z 1988-11-02T03:04:35.736Z ORB3620 75 118 953 1988-11-03T02:52:10.783Z 1988-11-03T03:04:18.279Z ORB3621 778 118 953 1988-11-04T02:00:18.812Z 1988-11-04T03:53:27.105Z ORB3622 764 118 953 1988-11-05T02:14:30.598Z 1988-11-05T03:58:41.637Z ORB3623 840 118 953 1988-11-06T01:59:31.100Z 1988-11-06T03:53:43.138Z ORB3624 950 118 953 1988-11-07T02:00:29.600Z 1988-11-07T03:58:51.641Z ORB3625 649 118 953 1988-11-08T02:00:27.579Z 1988-11-08T03:58:35.873Z ORB3626 77 118 953 1988-11-09T02:52:38.845Z 1988-11-09T03:04:37.351Z ORB3627 52 118 953 1988-11-10T02:52:33.371Z 1988-11-10T03:00:35.621Z ORB3628 636 118 953 1988-11-11T02:01:25.638Z 1988-11-11T03:59:24.189Z ORB3629 659 118 953 1988-11-12T02:00:42.145Z 1988-11-12T03:59:27.913Z ORB3630 586 118 953 1988-11-13T02:00:29.895Z 1988-11-13T03:59:33.650Z ORB3631 613 118 953 1988-11-14T02:01:21.126Z 1988-11-14T03:54:06.879Z ORB3632 667 118 953 1988-11-15T02:00:20.326Z 1988-11-15T03:59:44.318Z ORB3633 77 118 953 1988-11-16T02:53:15.346Z 1988-11-16T03:05:13.103Z ORB3634 78 118 953 1988-11-17T02:53:12.869Z 1988-11-17T03:05:20.364Z ORB3635 487 118 953 1988-11-18T02:01:59.881Z 1988-11-18T04:00:06.678Z ORB3636 639 118 953 1988-11-19T02:01:49.618Z 1988-11-19T03:59:19.623Z ORB3637 150 118 953 1988-11-20T02:55:21.657Z 1988-11-20T03:11:00.662Z ORB3638 269 118 953 1988-11-21T02:01:10.638Z 1988-11-21T03:10:34.676Z ORB3639 701 118 953 1988-11-22T02:01:31.128Z 1988-11-22T03:59:47.677Z ORB3640 155 118 953 1988-11-23T02:49:36.146Z 1988-11-23T03:14:28.583Z ORB3641 154 118 953 1988-11-24T02:50:34.639Z 1988-11-24T03:14:39.141Z ORB3642 719 118 953 1988-11-25T02:02:35.152Z 1988-11-25T04:01:20.182Z ORB3643 728 118 953 1988-11-26T02:00:56.680Z 1988-11-26T04:00:01.195Z ORB3644 737 118 953 1988-11-27T02:00:05.175Z 1988-11-27T04:01:46.712Z ORB3645 738 118 953 1988-11-28T02:02:38.224Z 1988-11-28T04:02:00.730Z ORB3646 274 118 953 1988-11-29T02:03:52.730Z 1988-11-29T04:02:01.752Z ORB3647 125 118 953 1988-11-30T02:51:24.272Z 1988-11-30T03:17:26.281Z ORB3648 120 118 953 1988-12-01T02:52:14.291Z 1988-12-01T03:17:38.302Z ORB3650 687 118 953 1988-12-03T02:04:51.308Z 1988-12-03T04:03:13.820Z ORB3652 667 118 953 1988-12-05T02:05:17.369Z 1988-12-05T04:03:50.395Z ORB3653 370 118 953 1988-12-06T02:05:29.891Z 1988-12-06T04:03:56.934Z ORB3654 139 118 953 1988-12-07T02:51:06.442Z 1988-12-07T03:20:06.453Z ORB3655 142 118 953 1988-12-08T02:51:00.971Z 1988-12-08T03:20:38.981Z ORB3656 273 118 953 1988-12-09T02:37:01.472Z 1988-12-09T04:04:55.508Z ORB3658 146 118 953 1988-12-11T02:51:18.033Z 1988-12-11T03:21:44.045Z ORB3659 631 118 953 1988-12-12T02:08:01.039Z 1988-12-12T04:00:55.043Z ORB3660 310 118 953 1988-12-13T02:07:29.028Z 1988-12-13T03:55:32.035Z ORB3661 146 118 953 1988-12-14T02:51:27.576Z 1988-12-14T03:22:05.587Z ORB3662 150 118 953 1988-12-15T02:51:14.596Z 1988-12-15T03:22:32.606Z ORB3663 369 118 953 1988-12-16T02:07:54.073Z 1988-12-16T04:16:45.084Z ORB3664 636 118 953 1988-12-17T02:08:48.051Z 1988-12-17T04:01:13.582Z ORB3665 661 118 953 1988-12-18T02:08:47.037Z 1988-12-18T04:07:27.577Z ORB3666 660 118 953 1988-12-19T02:09:07.039Z 1988-12-19T04:07:47.577Z ORB3667 529 118 953 1988-12-20T02:09:46.522Z 1988-12-20T03:55:55.557Z ORB3668 146 118 953 1988-12-21T02:52:10.533Z 1988-12-21T03:23:28.544Z ORB3669 141 118 953 1988-12-22T02:54:10.519Z 1988-12-22T03:23:46.528Z ORB3670 414 118 953 1988-12-23T02:09:52.975Z 1988-12-23T04:29:06.523Z ORB3671 624 118 953 1988-12-24T02:11:23.492Z 1988-12-24T04:01:14.498Z ORB3673 699 118 953 1988-12-26T02:11:51.491Z 1988-12-26T04:21:22.983Z ORB3674 353 118 953 1988-12-27T02:12:04.479Z 1988-12-27T04:10:12.031Z ORB3675 110 118 953 1988-12-28T02:54:48.986Z 1988-12-28T03:24:36.997Z ORB3676 145 118 953 1988-12-29T02:54:41.492Z 1988-12-29T03:24:55.502Z ORB3677 344 118 953 1988-12-30T02:13:36.946Z 1988-12-30T04:01:39.950Z ORB3678 670 118 953 1988-12-31T02:13:11.973Z 1988-12-31T04:45:28.514Z ORB3681 254 118 953 1989-01-03T02:14:34.950Z 1989-01-03T04:11:31.990Z ORB3682 136 118 953 1989-01-04T02:56:20.433Z 1989-01-04T03:25:06.441Z ORB3683 128 118 953 1989-01-05T02:58:28.927Z 1989-01-05T03:25:46.937Z ORB3684 526 118 953 1989-01-06T02:13:47.400Z 1989-01-06T04:12:51.440Z ORB3685 612 118 953 1989-01-07T02:13:47.896Z 1989-01-07T04:23:09.941Z ORB3687 82 118 953 1989-01-09T02:23:40.889Z 1989-01-09T04:01:20.922Z ORB3688 564 118 953 1989-01-10T02:15:29.375Z 1989-01-10T04:13:43.416Z ORB3689 159 118 953 1989-01-11T02:58:37.857Z 1989-01-11T03:23:30.295Z ORB3691 385 118 953 1989-01-13T02:49:12.840Z 1989-01-13T04:14:02.865Z ORB3692 435 118 953 1989-01-14T02:16:11.300Z 1989-01-14T04:14:23.840Z ORB3693 575 118 953 1989-01-15T02:17:10.296Z 1989-01-15T04:14:42.336Z ORB3694 514 118 953 1989-01-16T02:16:44.781Z 1989-01-16T04:14:46.820Z ORB3695 561 118 953 1989-01-17T02:16:15.260Z 1989-01-17T04:14:57.300Z ORB3696 102 118 953 1989-01-18T03:05:09.714Z 1989-01-18T03:21:12.715Z ORB3697 143 118 953 1989-01-19T03:05:22.732Z 1989-01-19T03:20:23.737Z ORB3698 611 118 953 1989-01-20T02:15:58.191Z 1989-01-20T04:15:14.233Z ORB3699 563 118 953 1989-01-21T02:17:26.637Z 1989-01-21T04:15:31.927Z 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.