Impact of Receiver Saturation on Surface Doppler Velocity Measurements From the EarthCARE Cloud Profiling Radar
Impact of Receiver Saturation on Surface Doppler Velocity Measurements From the EarthCARE Cloud Profiling Radar
复制标题
接收机饱和度对 EarthCARE 云剖面雷达表面多普勒速度测量的影响
DOI：
10.1109/tgrs.2014.2335896
复制
发表时间：
2015
影响因子：
8.2
通讯作者：
P. Kollias
中科院分区：
文献类型：
--
作者：
A. Battaglia;P. Kollias
依赖于地球表面多普勒速度测量的天线指向技术预计将在星载雷达系统中实现天线误指向校正方面发挥关键作用。在这里，EarthCARE云廓线雷达（CPR）接收器饱和对地面多普勒速度测量的质量的影响进行了讨论。CPR线性接收器预期总是从表面回波饱和。基于I/Q模拟框架的结果表明，对于EarthCARE雷达配置：1）饱和引入的偏差可以忽略不计; 2）当从不饱和到完全饱和的表面返回时，速度估计的标准偏差将增加30-50%，相应的脉冲重复频率在6.1和7.5 kHz之间。因此，在完全饱和的情况下，需要更长的积分时间才能实现相同的精度。
Antenna-pointing techniques that rely on Earth's surface Doppler velocity measurements are expected to play a crucial role in enabling antenna mispointing corrections in spaceborne radar systems. Here, the impact of the EarthCARE cloud profiling radar (CPR) receiver saturation on the quality of the surface Doppler velocity measurements is discussed. The CPR linear receiver is expected to saturate always from surface echoes. Our results based on an I/Q simulation framework show that for the EarthCARE radar configuration: 1) biases introduced by saturation will be negligible; 2) the standard deviation of the velocity estimates will increase by 30-50% when moving from unsaturated to completely saturated surface return for a corresponding pulse repetition frequency in the range between 6.1 and 7.5 kHz. As a consequence longer integration times will be necessary to achieve the same accuracy in presence of complete saturation.
识别海洋上空 CloudSat 观测中受多重散射影响的剖面
影响因子：
--
作者：
Battaglia;J. Haynes;T. L'Ecuyer;C. Simmer
通讯作者：
C. Simmer