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]

Parameters

Required

+plat_0=<value>

Peg latitude (in degree)

+plon_0=<value>

Peg longitude (in degree)

+phdg_0=<value>

Peg heading (in degree)

Optional

+h_0=<value>

Average height (in metre)

Defaults to 0.0.

+lon_0=<value>

Central meridian/longitude of natural origin, longitude of origin or longitude of false origin (naming and meaning depend on the projection method).

Defaults to 0.0.

Note

The default convention is to interpret this value as decimal degrees. To specify radians instead, follow the value with the "r" character.

Example: +lon_0=1.570796r

See Projection Units for more information.

+x_0=<value>

False easting, easting at false origin or easting at projection centre (naming and meaning depend on the projection method). Always in meters.

Defaults to 0.0.

+y_0=<value>

False northing, northing at false origin or northing at projection centre (naming and meaning depend on the projection method). Always in meters.

Defaults to 0.0.

+ellps=<value>

The name of a built-in ellipsoid definition.

See Ellipsoids for more information, or execute proj -le for a list of built-in ellipsoid names.

Defaults to "GRS80".

+R=<value>

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

See Ellipsoid size parameters for more information.