부산대학교 도서관

Interferometric radiometry has been gaining interest since its demonstration by SMOS as a viable solution to synthesize the large apertures required for high spatial resolution microwave radiometry. While SMOS operates in LEO, larger apertures will be required for geostationary Earth observation and future planetary exploration probes. Recent concepts propose the application of satellite formation flight to synthesize the required apertures. However, since these concepts require wavelength-scale precision satellite relative position control, the system is expected to be complex. In this work a new single-satellite approach is proposed, in which the antenna elements are placed on large deployable membrane structures. The technology is mature with extensive development conducted for solar sailing. The main challenge remaining is developing an antenna element thin enough such structures. To demonstrate the concept, JAXA is developing HELIOS interferometer demonstrator. Its status, as well as a new inter-element phase synchronization scheme is presented.