Data Types

The master definition for the known types of ASCII file is common.types . Each line defines one data type. The first field is the name of the data type. After the equal sign [inside the curly brackets] is the idl definition of the data type. first is idl name, the type name with a '_' appended to it. then comes a list of coma separated fields which represents the data fields on one line of the data file. each field in this definition has the name of the field a colon and a number, usually zero. If this number is an integer, '0', the field is defines as integer, otherwise the number is a real. At the end of the line, after the semi colon, is the number of fields in this data type. The data type are divided in to several groups. Each member of a group is similar to other members of that grow. Usually by having more or fewer members. below is a short description of the different data types as they are found in common.types The names of data types inside a group are usually the base type suffixed by one or more letters that indicate the modification. e.g.

common meanings of the suffix on data type names

• s ==> small
• b ==> b field added
• m ==> minimal size of group
• n ==> a field, 'n', was added to the data type to indicate the highest level of editing that this item survived.

meanings of data type names

• • any just to read in any numeric file, to examine it
  • anyst a string version of any
• key a basic parameter file
• jwb a basic parameter file only one that has moment parameters , and n`only one with both fit & moment parameters.
• time mostly just time field, used in logging data
• sedr trajectory data
• voy_ voyprint output. l, m, e suffix are for l, m oe e1.//e2 modes.

meanings of some of the data fields names

• year year of data
• day day of data
• hr hour of data
• min minute of data
• sec second of data
• msec millisecond of data
• sp speed of plasma
• df density of protons from fit
• wf width of protons from fit
• vr R component of velocity from fit
• vt T component of velocity from fit
• vn N component of velocity from fit
• alpha percentage of the proton density the alpha-s are
• dm density of protons from moments
• wm width of protons from moments
• br R component of B field
• bt T component of B field
• bn N component of B field
• x X position of Space Craft
• y Y position of Space Craft
• z Z position of Space Craft
• vx X component of velocity of space Craft
• vy Y component of velocity of space Craft
• vz Z component of velocity of space Craft