init--instruct and run the softGNSS;
initsettings--initialize every variable;
%setsettings--start a interface and enter the value of variable;
%probedate--plot raw data information;
%acquisition--acquire the GPS signal;
%plotacquisition;
%tracking--track the signal;
%plotTracking;
findpreambles--bit synchronization;
%calculatePseudoranges--calculate the pseudorange;
%plotNavigation
%postNavigation
%postprocessing