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
----------------------------------------------------------------------------
ORB1000 172 15 130 1981-09-01T01:46:45.384Z 1981-09-01T02:21:57.384Z
ORB1001 43 15 130 1981-09-02T01:39:15.053Z 1981-09-02T02:02:27.053Z
ORB1002 154 15 130 1981-09-03T01:44:32.060Z 1981-09-03T02:18:44.060Z
ORB1003 70 15 130 1981-09-04T01:53:12.532Z 1981-09-04T02:08:00.532Z
ORB1004 72 15 130 1981-09-05T01:42:52.403Z 1981-09-05T02:06:04.403Z
ORB1005 219 15 130 1981-09-06T01:39:07.749Z 1981-09-06T02:23:43.749Z
ORB1006 44 15 130 1981-09-07T01:37:46.512Z 1981-09-07T02:02:22.512Z
ORB1007 157 15 130 1981-09-08T01:47:12.818Z 1981-09-08T02:22:24.818Z
ORB1008 67 15 130 1981-09-09T01:49:50.566Z 1981-09-09T02:05:38.566Z
ORB1009 2 15 130 1981-09-10T01:59:15.757Z 1981-09-10T02:04:51.757Z
ORB1010 224 15 130 1981-09-11T01:35:40.499Z 1981-09-11T02:21:52.499Z
ORB1011 94 15 130 1981-09-12T01:48:04.807Z 1981-09-12T02:06:52.807Z
ORB1012 121 15 130 1981-09-13T01:51:16.705Z 1981-09-13T02:17:28.705Z
ORB1013 112 15 130 1981-09-14T01:41:52.025Z 1981-09-14T02:04:52.025Z
ORB1014 46 15 130 1981-09-15T01:52:15.050Z 1981-09-15T02:02:15.050Z
ORB1015 48 15 130 1981-09-16T01:52:49.628Z 1981-09-16T02:02:37.628Z
ORB1016 130 15 130 1981-09-17T01:46:47.866Z 1981-09-17T02:15:23.866Z
ORB1017 77 15 130 1981-09-18T01:39:33.828Z 1981-09-18T01:59:57.828Z
ORB1018 135 15 130 1981-09-19T01:37:07.424Z 1981-09-19T02:04:55.424Z
ORB1019 95 15 130 1981-09-20T01:42:16.824Z 1981-09-20T02:01:04.824Z
ORB1021 82 15 130 1981-09-22T01:50:46.864Z 1981-09-22T02:07:46.864Z
ORB1022 70 15 130 1981-09-23T01:43:31.570Z 1981-09-23T02:00:07.570Z
ORB1023 200 15 130 1981-09-24T01:31:28.141Z 1981-09-24T02:16:28.141Z
ORB1024 44 15 130 1981-09-25T01:50:48.552Z 1981-09-25T01:59:24.552Z
ORB1025 81 15 130 1981-09-26T01:45:33.349Z 1981-09-26T02:03:21.349Z
ORB1026 96 15 130 1981-09-27T01:51:53.869Z 1981-09-27T02:11:17.869Z
ORB1027 124 15 130 1981-09-28T01:30:38.625Z 1981-09-28T01:56:26.625Z
ORB1028 17 15 130 1981-09-29T01:50:47.238Z 1981-09-29T01:53:59.238Z
ORB1029 72 15 130 1981-09-30T01:45:07.864Z 1981-09-30T01:59:19.864Z
ORB1030 159 15 130 1981-10-01T01:32:16.561Z 1981-10-01T02:07:40.561Z
ORB1031 128 15 130 1981-10-02T01:30:01.366Z 1981-10-02T02:16:37.366Z
ORB1032 26 15 130 1981-10-03T01:48:22.269Z 1981-10-03T01:57:58.269Z
ORB1034 28 15 130 1981-10-05T01:39:40.705Z 1981-10-05T01:56:16.705Z
ORB1035 187 15 130 1981-10-06T01:28:38.159Z 1981-10-06T02:13:14.159Z
ORB1036 202 15 130 1981-10-07T01:27:47.829Z 1981-10-07T02:10:11.829Z
ORB1037 218 15 130 1981-10-08T01:27:45.985Z 1981-10-08T02:15:21.985Z
ORB1038 204 15 130 1981-10-09T01:31:44.336Z 1981-10-09T02:15:56.336Z
ORB1039 214 15 130 1981-10-10T01:27:07.012Z 1981-10-10T02:12:55.012Z
ORB1040 214 15 130 1981-10-11T01:28:18.096Z 1981-10-11T02:14:30.096Z
ORB1041 42 15 130 1981-10-12T01:43:05.389Z 1981-10-12T01:52:17.389Z
ORB1042 245 15 130 1981-10-13T01:26:29.146Z 1981-10-13T02:15:17.146Z
ORB1043 232 15 130 1981-10-14T01:26:17.528Z 1981-10-14T02:12:29.528Z
ORB1044 157 15 130 1981-10-15T01:42:06.333Z 1981-10-15T02:14:30.333Z
ORB1046 215 15 130 1981-10-17T01:26:08.972Z 1981-10-17T02:08:56.972Z
ORB1047 197 15 130 1981-10-18T01:27:59.163Z 1981-10-18T02:07:11.163Z
ORB1049 200 15 130 1981-10-20T01:26:29.053Z 1981-10-20T02:06:17.053Z
ORB1050 230 15 130 1981-10-21T01:26:08.812Z 1981-10-21T02:12:32.812Z
ORB1051 157 15 130 1981-10-22T01:39:37.172Z 1981-10-22T02:13:25.172Z
ORB1052 152 15 130 1981-10-23T01:36:42.108Z 1981-10-23T02:07:30.108Z
ORB1053 178 15 130 1981-10-24T01:30:23.542Z 1981-10-24T02:05:59.542Z
ORB1054 99 15 130 1981-10-25T01:28:05.646Z 1981-10-25T01:59:41.646Z
ORB1055 70 15 130 1981-10-26T01:29:36.237Z 1981-10-26T01:55:00.237Z
ORB1056 44 15 130 1981-10-27T01:39:43.500Z 1981-10-27T02:09:43.500Z
ORB1057 44 15 130 1981-10-28T01:28:27.297Z 1981-10-28T01:50:15.297Z
ORB1058 161 15 130 1981-10-29T01:33:47.733Z 1981-10-29T02:07:59.733Z
ORB1059 29 15 130 1981-10-30T01:42:32.711Z 1981-10-30T01:48:20.711Z
ORB1060 93 15 130 1981-10-31T01:29:18.292Z 1981-10-31T01:47:54.292Z
ORB1061 28 15 130 1981-11-01T01:45:52.485Z 1981-11-01T01:56:40.485Z
ORB1062 45 15 130 1981-11-02T01:24:27.233Z 1981-11-02T01:47:51.233Z
ORB1063 31 15 130 1981-11-03T01:42:38.535Z 1981-11-03T01:48:38.535Z
ORB1064 73 15 130 1981-11-04T01:28:02.412Z 1981-11-04T01:57:14.412Z
ORB1065 26 15 130 1981-11-05T01:42:50.719Z 1981-11-05T01:48:26.719Z
ORB1066 140 15 130 1981-11-06T01:37:03.538Z 1981-11-06T02:04:51.538Z
ORB1067 203 15 130 1981-11-07T01:29:41.076Z 1981-11-07T02:10:17.076Z
ORB1068 9 15 130 1981-11-08T01:28:42.978Z 1981-11-08T01:54:54.978Z
ORB1069 71 15 130 1981-11-09T01:33:09.324Z 1981-11-09T02:08:33.324Z
ORB1070 221 15 130 1981-11-10T01:25:48.122Z 1981-11-10T02:09:48.122Z
ORB1071 214 15 130 1981-11-11T01:24:27.322Z 1981-11-11T02:07:03.322Z
ORB1072 129 15 130 1981-11-12T01:30:18.869Z 1981-11-12T02:04:30.869Z
ORB1073 136 15 130 1981-11-13T01:35:11.010Z 1981-11-13T02:02:11.010Z
ORB1074 173 15 130 1981-11-14T01:32:27.352Z 1981-11-14T02:06:51.352Z
ORB1075 26 15 130 1981-11-15T01:37:56.078Z 1981-11-15T01:43:08.078Z
ORB1076 51 15 130 1981-11-16T01:28:25.075Z 1981-11-16T01:49:13.075Z
ORB1077 77 15 130 1981-11-17T01:36:30.292Z 1981-11-17T01:51:42.292Z
ORB1078 80 15 130 1981-11-18T01:35:23.786Z 1981-11-18T01:51:11.786Z
ORB1079 77 15 130 1981-11-19T01:37:41.432Z 1981-11-19T01:56:05.432Z
ORB1080 133 15 130 1981-11-20T01:31:23.272Z 1981-11-20T01:57:47.272Z
ORB1081 178 15 130 1981-11-21T01:29:53.305Z 1981-11-21T02:05:17.305Z
ORB1082 87 15 130 1981-11-22T01:35:59.464Z 1981-11-22T01:53:11.464Z
ORB1083 175 15 130 1981-11-23T01:33:05.709Z 1981-11-23T02:07:53.709Z
ORB1085 121 15 130 1981-11-25T01:34:30.448Z 1981-11-25T02:03:06.448Z
ORB1087 154 15 130 1981-11-28T01:30:43.194Z 1981-11-28T02:02:55.194Z
ORB1088 238 15 130 1981-11-28T01:26:49.467Z 1981-11-28T02:14:13.467Z
ORB1089 121 15 130 1981-11-29T01:26:31.596Z 1981-11-29T01:50:31.596Z
ORB1091 80 15 130 1981-12-02T01:34:55.354Z 1981-12-02T01:50:43.354Z
ORB1092 115 15 130 1981-12-02T01:27:36.926Z 1981-12-02T01:50:24.926Z
ORB1093 226 15 130 1981-12-03T01:27:30.167Z 1981-12-03T02:12:30.167Z
ORB1094 100 15 130 1981-12-04T01:29:35.160Z 1981-12-04T01:58:35.160Z
ORB1095 148 15 130 1981-12-05T01:29:27.826Z 1981-12-05T01:58:51.826Z
ORB1096 150 15 130 1981-12-06T01:26:44.093Z 1981-12-06T01:56:32.093Z
ORB1097 201 15 130 1981-12-07T01:32:00.088Z 1981-12-07T02:13:36.088Z
ORB1098 166 15 130 1981-12-08T01:27:27.642Z 1981-12-08T02:00:27.642Z
ORB1099 125 15 130 1981-12-09T01:31:42.749Z 1981-12-09T01:56:30.749Z
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.