Name
CL_op_rpvp2ae — Periapsis radius and velocity at periapsis to semi major axis and eccentricity
Calling Sequence
[sma,ecc] = CL_op_rpvp2ae(rp,vp[,mu])
Description
-
Computes keplerian parameters semi major axis and eccentricity from
periapsis radius and velocity at periapsis (elliptic and hyperbolic orbits).
- Last update : 20/2/2008
Parameters
- rp:
periapsis radius [m] (1xN)
- vp:
velocity at periapsis [m/s] (1xN)
- mu :
(optionnal) geocentric gravitational constant [m^3/s^2] (default value is %CL_mu)
- sma:
semi major axis [m] (1xN)
- ecc:
eccentricity (1xN)
Examples
// Elliptic orbit
rp = 7078.e3;
vp = 8.e3;
[sma,ecc] = CL_op_rpvp2ae(rp,vp)
// Hyperbolic orbit
rp = 7078.e3;
vp = 12.e3;
[sma,ecc] = CL_op_rpvp2ae(rp,vp)