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
----------------------------------------------------------------------------
ORB2001 129 15 130 1984-05-28T23:51:57.184Z 1984-05-29T00:28:33.184Z
ORB2002 136 15 130 1984-05-29T23:52:05.949Z 1984-05-30T00:23:05.949Z
ORB2036 2 15 130 1984-07-02T23:44:35.321Z 1984-07-03T00:08:35.321Z
ORB2037 127 15 130 1984-07-03T23:34:03.692Z 1984-07-03T23:59:27.692Z
ORB2038 45 15 130 1984-07-04T23:43:20.007Z 1984-07-04T23:55:20.007Z
ORB2039 56 15 130 1984-07-05T23:36:00.303Z 1984-07-05T23:47:00.303Z
ORB2040 94 15 130 1984-07-06T23:35:28.615Z 1984-07-06T23:54:04.615Z
ORB2041 22 15 130 1984-07-07T23:42:20.978Z 1984-07-07T23:46:32.978Z
ORB2042 2 15 130 1984-07-08T23:36:13.427Z 1984-07-08T23:57:49.427Z
ORB2043 60 15 130 1984-07-09T23:38:26.463Z 1984-07-09T23:50:14.463Z
ORB2044 119 15 130 1984-07-10T23:37:18.524Z 1984-07-11T00:09:30.524Z
ORB2045 46 15 130 1984-07-11T23:39:58.775Z 1984-07-11T23:50:10.775Z
ORB2046 2 15 130 1984-07-12T23:53:15.250Z 1984-07-12T23:53:27.250Z
ORB2047 196 15 130 1984-07-13T23:26:31.981Z 1984-07-14T00:09:07.981Z
ORB2048 9 15 130 1984-07-14T23:40:13.000Z 1984-07-14T23:41:49.000Z
ORB2049 2 15 130 1984-07-16T00:08:06.339Z 1984-07-16T00:08:18.339Z
ORB2050 78 15 130 1984-07-16T23:35:24.027Z 1984-07-16T23:51:48.027Z
ORB2051 1 15 130 1984-07-17T23:30:42.093Z 1984-07-17T23:30:42.093Z
ORB2054 39 15 130 1984-07-20T23:21:51.093Z 1984-07-20T23:30:39.093Z
ORB2055 40 15 130 1984-07-21T23:47:34.927Z 1984-07-21T23:55:22.927Z
ORB2056 18 15 130 1984-07-22T23:24:55.262Z 1984-07-22T23:28:19.262Z
ORB2057 11 15 130 1984-07-23T23:51:04.118Z 1984-07-23T23:53:04.118Z
ORB2058 104 15 130 1984-07-24T23:30:37.514Z 1984-07-24T23:51:25.514Z
ORB2060 31 15 130 1984-07-26T23:38:09.990Z 1984-07-26T23:44:09.990Z
ORB2061 131 15 130 1984-07-27T23:28:09.097Z 1984-07-27T23:58:45.097Z
ORB2063 3 15 130 1984-07-29T23:35:09.105Z 1984-07-29T23:39:45.105Z
ORB2064 1 15 130 1984-07-30T23:49:34.021Z 1984-07-30T23:49:34.021Z
ORB2065 101 15 130 1984-07-31T23:29:11.550Z 1984-07-31T23:53:59.550Z
ORB2066 5 15 130 1984-08-01T23:48:37.695Z 1984-08-01T23:49:25.695Z
ORB2067 2 15 130 1984-08-02T23:22:40.675Z 1984-08-02T23:22:52.675Z
ORB2068 5 15 130 1984-08-03T23:30:20.083Z 1984-08-03T23:38:08.083Z
ORB2069 2 15 130 1984-08-04T23:23:24.101Z 1984-08-04T23:23:36.101Z
ORB2070 27 15 130 1984-08-05T23:24:16.725Z 1984-08-05T23:35:28.725Z
ORB2071 52 15 130 1984-08-06T23:25:57.948Z 1984-08-06T23:36:09.948Z
ORB2072 25 15 130 1984-08-07T23:22:15.759Z 1984-08-07T23:36:03.759Z
ORB2073 75 15 130 1984-08-08T23:29:58.149Z 1984-08-08T23:55:22.149Z
ORB2075 88 15 130 1984-08-10T23:14:24.609Z 1984-08-10T23:42:24.609Z
ORB2077 3 15 130 1984-08-12T23:43:17.202Z 1984-08-12T23:50:41.202Z
ORB2078 132 15 130 1984-08-13T23:25:14.252Z 1984-08-13T23:52:50.252Z
ORB2079 89 15 130 1984-08-14T23:14:16.910Z 1984-08-14T23:34:52.910Z
ORB2080 2 15 130 1984-08-15T23:25:50.315Z 1984-08-15T23:26:02.315Z
ORB2083 1 15 130 1984-08-18T23:29:56.990Z 1984-08-18T23:29:56.990Z
ORB2084 62 15 130 1984-08-19T23:20:19.944Z 1984-08-19T23:33:31.944Z
ORB2085 2 15 130 1984-08-20T23:22:19.215Z 1984-08-20T23:22:31.215Z
ORB2086 4 15 130 1984-08-21T23:25:42.773Z 1984-08-21T23:26:18.773Z
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.