I trekked to a remote corner of Afghanistan to solve a riddle ‘Great Game’ spies could not

In search of the true source of the River Oxus, I journeyed to the Pamir Mountains, on the Afghanistan-Tajikistan border ...
IEEE

Improved Coordinate Registration for Over-the-Horizon Radar: Sampling-Based Approaches

Abstract: In the coordinate registration of skywave over-the-horizon radar (OTHR), errors arising from ionosphere modeling and parameter estimation are the main sources. We propose reducing these ...