A COMBINED ACTIVE AND PASSIVE METHOD FOR THE REMOTE SENSING OF ICE SHEET TEMPERATURE PROFILES
A COMBINED ACTIVE AND PASSIVE METHOD FOR THE REMOTE SENSING OF ICE SHEET TEMPERATURE PROFILES
复制标题
一种主动和被动相结合的冰盖温度剖面遥感方法
DOI：
10.2528/pier20030601
复制
发表时间：
2020
影响因子：
6.7
通讯作者：
P. Gogineni
中科院分区：
文献类型：
--
作者：
Haokui Xu;L. Tsang;J. Johnson;K. Jezek;Jie;P. Gogineni
超宽带软件定义的微波辐射计（UWBRAD）的开发使用0.5-2 GHz微波辐射测量探测内部冰盖温度。UWBRAD的机载亮温数据显示，由于密度波动的表面分层的反射，使得难以在千米深度范围内检索地下温度，因此显着减少。这种反射可以用超宽带雷达在同一频率范围内测量，这表明对极地冰盖的主动和被动遥感相结合。在本文中，我们建立了一个用于冰盖热发射和后向散射的相干反射率模型。麦克斯韦方程用于计算来自盖层的相干反射，并且WKB近似用于计算盖层下方的缓慢变化的轮廓的透射。结果表明，使用雷达测量来补偿反射效应对亮度温度的影响。结果表明，反射校正的亮温与物理温度和吸收剖面直接相关，从而使多频测量反演地下温度剖面成为可能。
The Ultra-Wideband Software defined microwave radiometer (UWBRAD) was developed to probe internal ice sheet temperatures using 0.5–2 GHz microwave radiometry. The airborne brightness temperature data of UWBRAD show a significant reduction due to reflections of surface layering of density fluctuations making difficult the retrieval of subsurface temperature in the kilometer range of depth. Such reflections can be measured by the ultra-wideband radar in the same frequency range suggesting a combined active and passive remote sensing of polar ice sheets. In this paper, we develop a coherent reflectivity model for both ice sheet thermal emission and backscattering. Maxwell equations are used to calculate the coherent reflections from the cap layers, and the WKB approximation is used to calculate the transmission for the slowly varying profile below the cap layers. Results are then shown to demonstrate the use of radar measurements to compensate reflection effects on brightness temperatures. It is shown that the reflections corrected brightness temperature is directly related to the physical temperature and absorption profile making possible the retrieval of subsurface temperature profile with multi-frequency measurements.
影响因子：
12.1
作者：
K. Matsuoka;R. Hindmarsh;G. Moholdt;M. J. Bentley;H. Pritchard;Joel Brown;H. Conway;R. Drews;G. Durand;D. Goldberg;T. Hattermann;J. Kingslake;J. Lenaerts;C. Martín;R. Mulvaney;K. Nicholls;F. Pattyn;N. Ross;T. Scambos;P. Whitehouse
通讯作者：
K. Matsuoka;R. Hindmarsh;G. Moholdt;M. J. Bentley;H. Pritchard;Joel Brown;H. Conway;R. Drews;G. Durand;D. Goldberg;T. Hattermann;J. Kingslake;J. Lenaerts;C. Martín;R. Mulvaney;K. Nicholls;F. Pattyn;N. Ross;T. Scambos;P. Whitehouse