| タイトル | Synthetic aperture microwave radiometer |
| 本文（外部サイト） | http://hdl.handle.net/2060/19890018810 |
| 著者（英） | Levine, D. M. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1988-01-01 |
| 言語 | eng |
| 内容記述 | Realizing the full potential of microwave remote sensing from space requires putting relatively large antennas in orbit. Research is being conducted to develop synthetic aperture antennas to reduce the physical collecting area required of sensors in space, and to possibly open the door to new applications of microwave remote sensing. The technique under investigation involves using a correlation interferometer with multiple baselines. The Microwave Sensors and Data Collection Branch has been engaged in research to develop this technique for applications to remote sensing of soil moisture from space. Soil moisture is important for agricultural applications and for understanding the global hydrologic cycle. An aircraft prototype of an instrument suitable for making such measurements was developed. This is an L-band radiometer called ESTAR which is hoped will become part of the Earth Observing System (EOS). ESTAR is a hybrid instrument which uses both real aperture antennas (long sticks to obtain resolution in the along-track dimension) and aperture synthesis (correlation between sticks to obtain resolution in the cross track dimension). The hybrid was chosen as a compromise to increase the sensitivity (T) of the instrument. |
| NASA分類 | INSTRUMENTATION AND PHOTOGRAPHY |
| レポートNO | 89N28181 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/140764 |
