Spherical Cross-track Height

Classification Miscellaneous
Available forms Forward and inverse.
Defined area Global
Alias sch
Domain 3D
Input type 3D coordinates
Output type Projected coordinates
proj-string: +proj=sch +plat_0=XX +plon_0=XX +phdg_0=XX

The SCH coordinate system is a sensor aligned coordinate system developed at JPL (Jet Propulsion Laboratory) for radar mapping missions.

See [Hensley2002]




Peg latitude (in degree)


Peg longitude (in degree)


Peg heading (in degree)



Average height (in metre)

Defaults to 0.0.


Longitude of projection center.

Defaults to 0.0.


False easting.

Defaults to 0.0.


False northing.

Defaults to 0.0.


See proj -le for a list of available ellipsoids.

Defaults to “GRS80”.


Radius of the sphere given in meters. If used in conjunction with +ellps +R takes precedence.