<br/>India will have a GPS-based aviation navigation system by next year when it will launch its own satellite. Speaking at a function organised by the US India Business Council in Washington on Thursday, Civil Aviation Minister Praful Patel said moving into GPS satellite based navigation system from the present ground based navigation system will shorten our air routes. He said this is important especially in the time of global warming. He said India would be doing trial run on borrowed satellite till the time its own satellite is launched. Mr Patel added that our entire air mapping would be done by GPS.<br/> Mr Patel also said that he has raised with top US officials the issue of American restrictions over dual use technology to India in the aviation sector.<br/> In reply to a question, Mr Patel said airport modernisation in Delhi is absolutely on track and would be inaugurated by the Prime Minister in July 3. He also said that Boeing is going to be paying compensation to Air India for the delay in the delivery of aircraft.