hamsci_psws.geopack.gcarToLcar

hamsci_psws.geopack.gcarToLcar(X, Y, Z, lat, lon, rho, inverse=False)[source]

Converts a position from global cartesian to local cartesian (and vice-versa).

The global cartesian coordinate system is defined as:

  • origin: center of the Earth

  • Z axis in the direction of the rotational axis and through the North pole

  • X axis in the equatorial plane and through the prime meridian.

The local cartesian coordinate system is defined as:

  • origin: local position

  • X: East

  • Y: North

  • Z: up

The meaning of the input (X,Y,Z) depends on the direction of the conversion (to global cartesian or to global spherical).

Parameters

  • X (float) – global cartesian X [km] or local cartesian X [km]

  • Y (flaot) – global cartesian Y [km] or local cartesian Y [km]

  • Z (float) – global cartesian Z [km] or local cartesian Z [km]

  • lat (float) – geocentric latitude [degree] of local cartesian system origin

  • lon (float) – geocentric longitude [degree] of local cartesian system origin

  • rho (float) – distance from center of the Earth [km] of local cartesian system origin

  • inverse (Optional[bool]) – inverse conversion

Returns

  • X (float) – local cartesian X [km] or global cartesian X [km]

  • Y (float) – local cartesian Y [km] or global cartesian Y [km]

  • Z (float) – local cartesian Z [km] or global cartesian Z [km]