| タイトル | Radar response from vegetation with nodal structure |
| 本文（外部サイト） | http://hdl.handle.net/2060/19840011888 |
| 著者（英） | Oneill, P. E.; Blanchard, B. J. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 1984-02-01 |
| 言語 | eng |
| 内容記述 | Radar images from the SEASAT synthetic aperture radar (SAR) produced unusually high returns from corn and sorghum fields, which seem to indicate a correlation between nodal separation in the stalk and the wavelength of the radar. These images also show no difference in return from standing or harvested corn. Further investigation using images from the Shuttle Imaging Radar (SIR-A) substantiated these observations and showed a degradation of the high return with time after harvest. From portions of corn and sweet sorghum stalks that were sampled to measure stalk water content, it was determined that near and after maturity the water becomes more concentrated in the stalk nodes. The stalk then becomes a linear sequence of alternating dielectrics as opposed to a long slender cylinder with uniform dielectric properties. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 84N19956
NASA-TM-86066
E84-10085
NAS 1.15:86066 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/160052 |
