Name

CL_ex_meanEckHech — Mean parameters of the Eckstein Hechler orbit extrapolation analytic model

Calling Sequence

   [mean_cir] = CL_ex_meanEckHech (osc_cir [,er[,mu[,zonals]]])
   
   

Description

  • Computes the mean parameters mean_cir given the osculatory parameters osc_cir
  • Warnings :

    - This function does not work for inclinations close (0.0022918 deg) to the critical inclinations (63.43494882 deg and 116.5650512 deg)

    - This function nominally works for eccentricities lower than 5e-3

    - This function works with a lesser precision for eccentricities between 5e-3 and 0.1

    - This function does not work for eccentricities greater than 0.1

  • Last update : 28/3/2008

Parameters

osc_cir:

circular adapted osculatory parameters [sma,ex,ey,inc,gom,pom+anm]' (6xN)

er:

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

mu:

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

zonals:

(optional) vector of zonals coefficients J1 to Jn (troncated to J6) to be used (default is %CL_j1jn(1:6)) (1xN)

mean_cir:

circular adapted mean parameters [sma,ex,ey,inc,gom,pom+anm]' (6xN)

Authors

CNES - DCT/SB

Bibliography

1 CNES - MSLIB FORTRAN 90, Volume E (me_eck_hech)

See also

CL_ex_lyddane, CL_ex_eckHech

Examples

// Example 1 : one orbit extrapolated at several dates :
osc_cir = [42166712,2.9e-3,1.2e-3,CL_deg2rad(97.2),CL_deg2rad(125),CL_deg2rad(0)]'
[mean_cir] = CL_ex_meanEckHech(osc_cir)