You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: get_rho15.m
    path of file: ./repos/nav_matlab/example/gps_spp_test/easysuite
    
    the code of the file until where you have to start completion: function [rho,X_ECEF] = get_rho15(tR_RAW,pseudorange,EPH_col,X_receiver)
%GET_RHO  Calculation of distance in ECEF system between
%	              satellite and receiver at time tR_RAW given the
%	              ephemeris Eph.

    
function [rho,X_ECEF] = get_rho15(tR_RAW,pseudorange,EPH_col,X_receiver)
%GET_RHO  Calculation of distance in ECEF system between
%	              satellite and receiver at time tR_RAW given the
%	              ephemeris Eph.

%Kai Borre 04-01-96
%Copyright (c) by Kai Borre
%$Revision: 1.1 $  $Date: 2006/05/21  $

global EPH

% Initial assigment of constants
vlight = 299792458;	         % vacuum speed of light in m/s
Omegae = 7.292115147e-5;	 % rotation rate of the earth in rad/s

%signal send