European Space Agency

Royal Belgian Institute for Aeronomy

uc160 - general constants

type  uc160

Synopsis

INCLUDE 'unilib.h'

COMMON /UC160/ pi, deg, re, gmagmo, eclipt, geoid, uma

REAL*8         pi, deg, re
REAL*8         gmagmo
REAL*8         eclipt, geoid(3), uma(30)

Arguments

pi

3.141592…

deg

Conversion factor from degrees to radians

re

Earth’s radius in km

gmagmo

McIlwain’s dipole moment in GRE3

eclipt

Ecliptic inclination

geoid

Geoid major axis in km and excentricities

uma

Atomic mass of the atmospheric constituents (see note of subroutine ua630())

Description

The common block uc160 is used to store physical constants. The common block is initialized by the subroutine ut990().

Dependencies

Used by

• ul225 - evaluate invariant radius and latitude

  deg

• ul220 - get information on a magnetic field line segment

  deg

• ul240 - evaluate the Hilton’s function

  re and gmagmo

• ul242 - inverse the Hilton function

  re and gmagmo

• ul245 - equatorial pitch angle

  deg and gmagmo

• ud317 - trace a magnetic drift shell

  re

• ud320 - evaluate a double time integral over a drift shell

  deg

• ud327 - search an extremum

  deg

• ud330 - evaluate the third invariant

  pi, re and gmagmo

• ud332 - evaluate the magnetic flux through a spherical pie

  deg

• uf410 - search the geographic position of a magnetic field line

  re

• uf411 - search a local magnetic equator

  deg

• uf417 - search the geographic position of a magnetic field line

  re

• uf421 - initialize and close a field line segment

  re

• uf422 - follow a field line until a boundary condition is reached

  re

• uf423 - Runge Kutta step

  deg and re

• uf424 - search the lowest B value

  deg

• uf425 - evaluate the curvature of the field lines

  deg

• uf426 - interpolating an extremum of B

  re

• uf427 - interpolating a value of B

  re

• uf428 - interpolating an altitude

  re

• um510 - select an internal field model

  deg

• um522 - position of the Sun

  pi, eclipt and deg

• um523 - GEO to GSM transformation

  deg

• um524 - GEO to SM transformation

  deg

• um530 - evaluate the magnetic field vector

  deg and re

• um532 - evaluate the external magnetic field

  deg

• um533 - evaluate distance to the magnetopause

  deg and re

• um535 - geocentric to geodetic transformation

  deg and re

• um536 - geodetic to geocentric transformation

  deg and re

• um538 - evaluate the magnetic local time

  deg

• ut541 - Convert spherical coordinates to cartesian coordinates

  deg

• ut542 - convert spherical vector components to cartesian components

  deg

• ut546 - convert cartesian coordinates to spherical coordinates

  deg

• ut547 - convert cartesian vector components to spherical components

  deg

• ut550 - select a coordinate transformation

  deg

• ut551 - Initialize an Euler rotation matrix

  deg

• ut555 - coordinate conversion

  deg

• ut556 - vector conversion

  deg

• ua630 - evaluate the atmospheric densities

  re

• ua631 - Anderson and Francis atmosphere

  re

• ua632 - MSISE-90 atmosphere

  re

• ua633 - IRI-90 ionosphere

  re, deg, pi and uma

• ua634 - compute mass density from number density

  uma

• ua637 - proton cross sections

  uma

• ut986 - pass general variables to IDL

  re and gmagmo

• ut991 - print the magnetic field line

  re and gmagmo

• ut992 - print the magnetic drift shell

  re and gmagmo

• ut993 - Store a magnetic field drift shell

  re and deg

• ut999 - radius of curvature in a dipolar magnetic field

  deg

Modified by

• ut990 - initialize the UNILIB library

  pi, deg, re, gmagmo, eclipt, geoid and uma

See also

None

Examples

None

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UNILIB/tags/v3.02