Laboratory measurements of radar backscatter from bare and snow-covered saline ice sheets
Laboratory measurements of radar backscatter from bare and snow-covered saline ice sheets
复制标题
裸露和冰雪覆盖的盐冰盖雷达后向散射的实验室测量
DOI：
10.1080/01431169508954448
复制
发表时间：
1995
影响因子：
3.4
通讯作者：
S. Tjuatja
中科院分区：
文献类型：
--
作者：
S. Beaven;G. L. Lockhart;S. Gogineni;A. R. Hossetnmostafa;K. Jezek;A. Gow;D. Perovich;A. Fung;S. Tjuatja
1990年和1992年冬季，我们在美国陆军寒区研究与工程实验室（CRREL）的模拟海冰上进行了Ku波段（13.4GHz）和C波段（5.3GHz）的雷达后向散射数据采集实验。这些实验是在室内水槽和室外池塘设施中生长的裸盐冰上进行的。雷达数据使用复矢量校准方案进行校准，以减少系统影响。结合雷达测量，我们测量了冰的物理特性。这些测量表明，裸盐冰的主要后向散射机制是表面散射。在1992年的室内水槽实验中，我们应用了四个连续的雪层（约2.5厘米）的盐冰盖后，冰的厚度已达到约12厘米的表面散射模型的预测的copolarized和交叉极化测量相媲美。结果表明，在正常入射条件下，后向散射下降了15dB，而在正常入射条件下，后向散射下降了15dB。
Abstract We performed experiments to collect radar backscatter data at Ku (13.4GHz) and C bands (5.3GHz) over simulated sea ice at the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) during the 1990 and 1992 winter seasons. These experiments were conducted over bare saline ice grown in an indoor tank and an outdoor pond facility. The radar data were calibrated using a complex vector calibration scheme to reduce systematic effects. In conjunction with the radar measurements we measured ice physical properties These measurements demonstrate that the dominant backscatter mechanism for bare saline ice is surface scattering. Both the copolarized and cross-polarized measurements compare favourably with the predictions of surface scattering models at two frequencies During the 1992 indoor tank experiment we applied four successive layers of snow (about 2.5 cm each) to the saline ice sheet after the ice thickness had reached about 12 cm. The backscatter at normal incidence dropped by l5dB and t...