# 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