CL_cw_twoImpulse

Description

• Computes the delta_v needed for a two impulse transfer.

  The transfer is performed with a maneuver at the starting point (delta_vi at A) and a maneuver at the end point (delta_vf at B).

  The local orbital reference frame tied to the target is LVLH.

  
  
  

Parameters

pv_ini:

Initial chaser position and velocity vector (A in the figure) in the target's LVLH frame [rx;ry;rz;vx;vy;vz]_ini [m] (6x1)

pv_fin:

Final chaser position and velocity vector (B in the figure) in the target's LVLH frame [rx;ry;rz;vx;vy;vz]_fin [m] (6x1)

alt:

Target's altitude [m]

t_transfer:

Transfer time (time between the two maneuvers) [s]

er:

(optional) Equatorial radius [m] (default is %CL_eqRad)

mu:

(optional) Gravitational constant [m^3/s^2] (default value is %CL_mu)

delta_vi:

Delta_v for the first maneuver [m/s] (3x1)

delta_vf:

Delta_v for the second maneuver [m/s] (3x1)

Authors

• CNES - DCT/SB

See also

• CL_cw_Nmatrix

• CL_cw_Mmatrix

Bibliography

• 1) Mecanique spatiale, CNES - Cepadues 1995, Tome II, 16.3

• 2) Orbital Mechanics for engineering students, H D Curtis, Chapter 7 (section 7.5)

Examples

pv_ini = [-30e3;0;0;10;0;0]; pv_fin = [-15860;0;0;0;0;0]; eqRad = CL_dataGet("eqRad"); alt = 450e3; omega = CL_kp_params("mm",eqRad+alt); periode = 2*%pi/omega; t_transfer = periode/4; [delta_vi,delta_vf]=CL_cw_twoImpulse(pv_ini,pv_fin,alt,t_transfer)