UD328

[ Name | Synopsis | Arguments | Description | Diagnostics | Common Blocks | Dependencies | See Also | Reported Bugs | Examples ]

Name

Subroutine UD328 - evaluate the second derivative of B

Synopsis

 
      RECORD /zgeo/ mgp
      REAL*8 sderv     
      INTEGER*4 ifail

      CALL UD328 (mgp,sderv,ifail)
   

Arguments

mgp

geographic position [in]

sderv

second derivative [out]

ifail

Error flag (see diagnostics) [out]

Description

The subroutine UD328 computes at the geocentric location mgp the value of where s is the arc length along the magnetic field line passing through the position mgp, and B is the magnetic field intensity.

History

The subroutine UD328 does not exist in version 1.05 and earlier.

Diagnostics

-32801, not enough place in the common block UC170

Common Blocks

UC160, general constants
UC170, temporary magnetic field line

Dependencies

Called by

UD321, evaluate a time integral over a magnetic field line

Calls

UF423, Runge Kutta step
UM530, evaluate the magnetic field vector
UT999, radius of curvature in a dipolar magnetic field

See also

None

Reported Bugs

None

Examples

None