Abstract
Beyond its primary mission objective, the TanDEM-X formation flying mission provides a unique test bed for demonstrating new SAR techniques such as Along-Track Interferometry (ATI) for ocean current measurement. In this paper we discuss the ATI formation control requirements and the limitations imposed by the implemented Helix-formation. We propose two ATI scenarios and verify their feasibility by means of software simulation and in-flight demonstration. In particular, flight results of the very first ATI experiment are presented, demonstrating the high potential of TanDEM-X for mapping ocean currents.
•We propose two methods for along-track interferometric oceanography with TanDEM-X.•Interferometry enables the mapping of ocean currents with high spatial resolution.•We present flight results from the first experiments at the Orkney Islands.•The results prove the feasibility and the high potential of the methods.
