Foliage-penetrating (FOPEN) radar is a relatively modern capability for surveillance and earth resource monitoring. It had been well known for several decades that radar could propagate efficiently through forests at frequencies below 1 GHz. But it was not until the 1960s that the propagation loss and clutter scattering models were effectively developed to provide reasonable expectations that fixed and moving objects could be detected. More importantly, the technology for effective waveform design and signal processing was not available until the advent of coherent sources and high-speed digital processing.
Foliage-Penetrating Radar, Page 1 of 2
< Previous page Next page > /docserver/preview/fulltext/books/ra/sbra503e/SBRA503E_ch14-1.gif /docserver/preview/fulltext/books/ra/sbra503e/SBRA503E_ch14-2.gif