MATLAB: Unable to use Aerospace Blockset function eci2ecef

Question

Hi, I need to a function to transform acceleration data from ECI to ECEF frame and I found this function on Aerospace Blockset which does exactly what I need (https://www.mathworks.com/help/aeroblks/eci2ecef.html). However, I was unable to use it within a normal matlab script. I tried one of the example codes from the help center:

r_eci = [-2981784 5207055 3161595];

utc = [2019 1 4 12 0 0];

mjd = mjuliandate(utc);

pm = polarMotion(mjd, 'action', 'none')*180/pi;

r_ecef = eci2ecef(utc, r_eci, 'pm', pm)

And I got the following error:

Unrecognized function or variable 'eci2ecef'.

Is it possible to use this function outiside of Simulink in a normal script? Does anyone knows a good replacement for this function?

Thanks

Answer 1

Hi Eduardo,

The "eci2ecef" is part of the set of function in CubeSats hence the function requires the 'Aerospace Blockset CubeSat Simulation Library' Add-on support package. You could download this from the Add-ons manager.

Hope it helps!