Collecting GPS data on the PC or on the mobile via Qt + use them to get a signal fast
maybe you know the "Almanach data":http://www.how-gps-works.com/glossary/almanac-data.shtml
So could a Qt-Application donwload them (there are sites on the web which provide them) to use them instead of searching for signal many minutes.
I don't know if nmealog has something to do with it?!