Some basic considerations of synthetic aperture radiometer

It has been noticed by the passive microwave remote sensing community that the synthetic aperture radiometer is a promising potential technology to provide high spatial resolution versus the conventional image scheme particularly in the low frequency microwave band. However, due to the difficulties encountered in transplanting this technique from radio astronomy into passive microwave Earth remote sensing, it becomes more and more obvious that to best adopt the technique, one must reformulate the problem dedicated to Earth remote sensing rather than to copy it directly from radio astronomy. In this paper, the authors present some basic analysis and discussions on the theoretical formulation of the synthetic aperture radiometers