European Space Agency

Royal Belgian Institute for Aeronomy

um535 - geocentric to geodetic transformation

subroutine  um535(mgeo, mgde)

Parameters:

• mgeo [zgeo,in] :: geocentric location

• mgde [zgeo,out] :: geodetic location

Description

The subroutine um535() transforms geocentric coordinates into geodetic coordinates in function of the geoid parameters stored in common block uc160 (see Astron.J. 66, 15 [1961]). Note that both locations are specified in spherical coordinates. For the geodetic coordinates, the RADIUS refers to the geodetic altitude incremented by a mean Earth’s radius (see zgeo). When cartesian coordinates or other coordinates systems (GEI, SM, GSM, MAG) have to be used, the coordinate transformations can be realized with the help of subroutines ut541(), ut546(), ut550() and ut555().

References

• Astron.J. 66, 15 [1961]

Diagnostics

None

Common Blocks

• uc160 - general constants

Dependencies

Called by

• um530 - evaluate the magnetic field vector

• ua630 - evaluate the atmospheric densities

Calls

None

See also

• um536 - geodetic to geocentric transformation

• ut541 - Convert spherical coordinates to cartesian coordinates

• ut546 - convert cartesian coordinates to spherical coordinates

• ut550 - select a coordinate transformation

• ut555 - coordinate conversion

Reported Bugs

None

Examples

None

---

UNILIB/tags/v3.02