$LastChangedDate: 27-Juil-2011 $

# CL_kp_params

Orbit properties for a Keplerian motion (mean motion, period, ...)

## Calling Sequence

       [par] = CL_kp_params(type_output,sma,[mu,rotr_pla])
       [par1,par2] = CL_kp_params([type_output1,type_output2],sma,[mu,rotr_pla])
       [par1,...,parN] = CL_kp_params([type_output1,... type_outputN],sma,[mu,rotr_pla])

## Description

- Computes quantities related to the Keplerian mean motion:

  - 'mm' : mean motion :

  - 'per' : period :

  - 'lgap' : gap in longitude between 2 consecutive ground tracks :

## Parameters

type_output :

  (string) Name(s) of outputs : 'mm','per','lgap' (1 x Noutput)

sma:

  Semi-major axis [m] (1xN)

mu:

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

rotr_pla:

  (optional) Rotation rate of the planet (default is %CL_rotrEarth)

par1,...,park:

  Output values [rad/s, s, rad] (1xN)

## Authors

- CNES - DCT/SB

## See also

- CL_op_paramsJ2

## Examples

    // Longitude gap between 2 consecutive ground tracks :
    sma = 7078.e3 ;
    [lgap] = CL_kp_params('lgap',sma)

    // Mean motion and period :
    sma = 7078.e3 ;
    [mm,per] = CL_kp_params(['mm','per'],sma)