UC120

[ Name | Synopsis | Arguments | Description | Dependencies | See Also | Examples ]

Name

Common block UC120 - magnetic field line description

Synopsis

      INCLUDE 'structure.h'
      
      COMMON /UC120/ nbrfl, kurfl, mfl

      INTEGER*4      nbrfl, kurfl
      RECORD /zfln/  mfl(nx120) 

Arguments

nbrfl

Number of field lines already computed

kurfl

Indice of the current field line

mfl

Description of the field line segments. Each indice corresponds to a field line.

Description

The common block UC120 is part of a set of three common blocks:
• UC110, magnetic drift shell description;
  
• UC120, magnetic field line description;
  
• UC130, set of magnetic field line segments.
  
This set of common blocks is used to store a magnetic drift shell which is defined by a set of magnetic field line segments.

The common block UC120 includes a global description of each field line segment as well as indices which points into the common block UC130.

The argument nbrfl indicates the number of magnetic field line segments included in the drift shell. For each segment, the geographic positions of the local magnetic equator (mfl.equat, and eventually of the foot points, mfl.footpn, mfl.footps), pointers to the eastern next and western previous segments (mfl.keast, mfl.kwest) and pointers to argument mseg of the common block UC130 (mfl.ind) are included in the description of each field line segment. The geographic position of the mirror points can be retrieved with the help of the pointers mfl.ind.jmirpn and mfl.ind.jmirps. Note that the common block UC170 has a similar structure (argument mlin).

Dependencies

Used by

UD315 (search the mirror point with the lowest altitude):

nbrfl and mfl


UD316 (search the equatorial point with the lowest magnetic field intensity):

nbrfl, mfl().equat, mfl().keast

UD317 (trace a magnetic drift shell - new):

mfl().equat, mfl().kwest

UD319 (transfer a field line segment from common block UC170 to UC130):

nbrfl and mfl


UD320 (evaluate a double time integral over a drift shell):

kurfl, mfl().kwest, mfl().keast, mfl().equat.coord, mfl().equat.b.dnrm, mfl().drift and mfl().ind

UD331 (evaluate the magnetic flux through a spherical cap):

mfl


UT985 (transfer a field line of the drift shell to IDL):

nbrfl and mfl


UT992 (print the magnetic drift shell):

nbrfl and mfl


UT993 (store a magnetic field drift shell):

nbrfl and mfl

Modified by

UD319 (transfer a field line segment from common block UC170 to UC130):

nbrfl, kurfl and mfl


UD320 (evaluate a double time integral over a drift shell):

kurfl

UD331 (evaluate the magnetic flux through a spherical cap):

kurfl


UT990 (initialize the UNILIB libray):

nbrfl and kurfl

See also

UC110, magnetic drift shell description
UC130, set of magnetic field line segments

Examples

None