DriftRateSigma:
--------------------------------------------------------------------------
Find the standard deviation of along-track drift per orbit due to rel nav errors.
Since version 7.
--------------------------------------------------------------------------
Form:
sigma_d = DriftRateSigma( a, sigma_x, sigma_ydot, rho_xydot );
--------------------------------------------------------------------------
------
Inputs
------
a (1) Semi-major axis of orbit [km]
sigma_x (1) Standard deviation of relative radial position error
sigma_ydot (1) Standard deviation of relative along-track velocity error
rho_xydot (1) Correlation coefficient (between -1 and +1)
-------
Outputs
-------
sigma_d (1) Standard deviation of the along-track drift per orbit
--------------------------------------------------------------------------
Children:
Common: Graphics/Plot2D
