Parameters 

Description 

RefLLA [vector] 

3-element LLA position vectors [Lat Long Alt] for reference location. Lat is the Latitude in degrees (-90 to 90), Long is the longitude positions in degrees (-180 to 180), and Alt is the altitude (m). 

Gecf [struct/list] 

Geometry parameters. Can be a structure (or array of structures) from GeomStruct or a comma separated list of (...,Recf,[Vecf],[EarthModel]) 

Recf [Nx3 matrix] 

N 3-element ECF position vectors (m). 

Vecf [Nx3 matrix] 

(Optional) N 3-element ECF velocity vectors (m/s). 

EarthModel [string/numeric] 

(Optional) If string, Geodetic (default) or Geometric. Use Geometric for a spherical earth and Geodetic for an oblate earth. If numeric and scalar - spherical earth radius, if vector - [a b], where a is the equatorial radius and b is the polar radius. Must pass in Vecf (can be []) to specify earth model 

Return Values 

Description 

G [struct] 

If Gecf is a structure, G will be a structure with position and velocity vectors in ENU coordinates. 

R [Nx3 matrix] 

ENU position vectors (m) 

V [Nx3 matrix] 

ENU velocity vectors (m/s)