Parameters 

Description 

Glla [struct/list] 

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

Rlla [Nx3 matrix] 

N 3-element LLA position vectors [Lat Long Alt]. 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). 

Vlla [Nx3 matrix] 

(Optional) N 3-element LLA velocity vectors ([Vxy Heading Vz]). Vxy is the velocity in a cylindrical coordinate frame with the XY plane tangent to the Earth's surface (m/s). Heading is the heading in degrees clockwise (from North). Vz is the velocity in the vertical direction (m/s). 

EarthModel [string/numeric] 

(Optional) If string, Geometric (default) or Geodetic. 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 Vlla (can be []) to specify earth model 

Return Values 

Description 

G [struct] 

If Glla is a structure, G will be a structure with position and velocity vectors in ECF coordinates. Otherwise, the output will be position and [velocity] vectors [R, [V]]. 

R [Nx3 matrix] 

ECF position vectors (m) 

V [Nx3 matrix] 

ECF velocity vectors (m/s)