% data for ee263 problem on an E-911 system
c = 0.3;  % speed of light in m/ns
S = [ -20000 1000 -3000 4000 -3500 1000 4000 -4000 6000;
        5000 3500 -4000 1000  2000 6000 -3000 -1500 -1000];
% location of base stations (in m)
t = [  
    79445;
    20009;
    21622;
    13683;
    24709;
    28223;
    11293;
    22990;
    16446]';
% arrival times of signal at base stations (in ns)