Name

CL_op_rarp2ae — Apoapsis radius and periapsis radius to semi major axis and eccentricity (elliptic orbits)

Calling Sequence

   [sma,ecc] = CL_op_rarp2ae(ra,rp[,mu])
   
   

Description

  • Computes keplerian parameters semi major axis and eccentricity from apoapsis and periapsis radius (only ellipse).
  • Last update : 20/2/2008

Parameters

ra:

apoapsis radius [m] (1xN)

rp:

periapsis radius [m] (1xN)

mu :

(optionnal) geocentric gravitational constant [m^3/s^2] (default value is %CL_mu)

sma:

semi major axis [m] (1xN)

ecc:

eccentricity (1xN)

Authors

CNES - DCT/SB

Examples

rp = 7078.e3;
ra = 7178.e3;
[sma,ecc] = CL_op_rarp2ae(ra,rp)