Microwave imaging of the brightness temperature distribution of extended areas in the near and far field using two-dimensional aperture synthesis with high spatial resolution
Article first published online: 7 DEC 2012
Copyright 1998 by the American Geophysical Union.
Volume 33, Issue 3, pages 781–801, May-June 1998
How to Cite
1998), Microwave imaging of the brightness temperature distribution of extended areas in the near and far field using two-dimensional aperture synthesis with high spatial resolution, Radio Sci., 33(3), 781–801, doi:10.1029/97RS02398., , , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Accepted: 27 AUG 1997
- Manuscript Received: 12 MAR 1997
Aperture synthesis is an attractive alternative to conventional passive microwave imaging systems for remote sensing applications. Whenever a high spatial resolution is desired or the imaging process should work like an optical camera or when microwave remote sensing in the near field has to be distance adaptive, conventional systems cause a lot of problems. However, aperture synthesis for practical applications requires a lot of single receivers and correlators. This can cause other problems because of the large number of possible imperfections. To get an estimation of such effects, the imaging expressions for the aperture synthesis principle are developed for the near- and far-field conditions of a real system. To support the theory and to get an estimation of the feasibility of this imaging method, a simple experimental system is described and experimental results of high spatial resolution for the near and far field are shown. For the near-field case a special reconstruction algorithm was developed and is described theoretically and validated by the experiments. A discussion of the temperature resolution of aperture synthesis concludes the paper.