GEOS - Geostationary Satellite View

Name Geostationary Satellite View
Alias GEOS
Alias Normalized Geostationary Projection
EPSG Code (none)
GeoTIFF Code
OGC WKT Name GEOS
Supported By PROJ.4, OGC WKT

Projection Parameters

Name EPSG # GeoTIFF ID OGC WKT Units Notes
Longitude of natural origin 2 NatOriginLong central_meridian Angular
Satellite Height ? ? satellite_height Linear
False Easting 6 FalseEasting false_easting Linear
False Northing 7 FalseNorthing false_northing Linear

Notes

Documented in document CGMS 03 (Coordinate Group for Meteorological Satellites - LRIT/HRIT Global Specification). Possibly availble at url http://www.eumetsat.int/en/area4/msg/news/us_doc/cgms_03_26.pdf. The GEOS projection is detailed in section 4.4.3.2.

The document suggests a spheroid with a major axis of 6378169.0m and a semi minor axis of 6356583.8m.

The document describes the satellite height as distance from the satellite to the center of earth, but for various reasons I have chosen to specify it as height above the ellipsoid in the WKT (and in PROJ.4). The document suggests a height of 42164000m which on the suggested ellipsoid translates to 35785831m above the ellipsoid.

PROJ.4 Organization

  +proj=geos  +lon_0=Central Meridian
              +h=Satellite Height
              +x_0=False Easting
              +y_0=False Northing