| タイトル | Coherent microwave backscatter of natural snowpacks |
| 本文（外部サイト） | http://hdl.handle.net/2060/19780011635 |
| 著者（英） | Angelakos, D. J.; Linlor, W. I.; Smith, J. L.; Clapp, F. D. |
| 著者所属（英） | California Univ. |
| 発行日 | 1977-01-01 |
| 言語 | eng |
| 内容記述 | The backscatter of natural snowpacks was measured using a swept-frequency system operating from 5.8 to 8.0 GHz. Snow layering produced sequences of maxima and minima in backscatter intensity, with typical peak-to-valley ratios of 15 db. Wetness produced in the upper portion of the snowpack by solar heat input enhanced the effect of layering. The layer response persisted for incidence exhibits predominantly coherent properties. Frequency modulation of the incident signal masked the layer response by averaging the unmodulated response over the bandwidth represented by the modulation. Further changes in backscatter were attributed to changes in wetness in the surface regions of the snowpack; for a fixed frequency of 13.5 GHz and incidence angle of 39 deg, the backscatter decreased typically 15 db between 11 A.M. and noon, and returned to approximately its initial level of overnight. |
| NASA分類 | EARTH RESOURCES AND REMOTE SENSING |
| レポートNO | 78N19578
NASA-CR-155800 |
| 権利 | No Copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/179576 |
