UC160
Common block UC160  general constants
INCLUDE 'structure.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)

pi

3.141592...

deg

Conversion factor from degrees to radians

re

Earth's radius in km

gmagmo

McIlwain's dipole moment in GR_{E}^{3}

eclipt

Ecliptic inclination

geoid

Geoid major axis in km and excentricities

uma

Atomic mass of the atmospheric constituents
(see note of subroutine UA630)
The common block UC160 is used to store physical constants.
The common block is initialized by the subroutine
UT990.
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 drift shell  new):

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  new):

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 a geomagnetic 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
(external magnetic field):

deg
 UM533
(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
(simple atmospheric density distribution):

re
 UA633
(Pfitzer atmospheric model):

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 libray):

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