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首页> 外文期刊>Selected Topics in Applied Earth Observations and Remote Sensing, IEEE Journal of >Height Precision of SAR Altimeter and Conventional Radar Altimeter Based on Flight Experimental Data
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Height Precision of SAR Altimeter and Conventional Radar Altimeter Based on Flight Experimental Data

机译：基于飞行实验数据的SAR高度表和常规雷达高度表的高度精度

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摘要

Compared with conventional radar altimeter (CRA), synthetic aperture radar altimeter (SARAL) is a new generation radar altimeter with better height precision and along-track spatial resolution. As using synthetic aperture technique, SARAL data processing and waveform model are very different from CRA. To verify the performance and the data processing algorithm, an airborne experimental system of SARAL is developed. The experimental system was installed in Y-12 aircraft, and some valid data was obtained in October 2014. The echo data with SAR mode is obtained in the experiment and the echo data of CRA mode is extracted from SAR mode data. The two modes have the same observation targets and error sources and, then, their height measurement precisions are comparable. The results indicate that the range measurement precision of SARAL is improved about 1 times. The difference of the significant wave heights from the SAR mode data and CRA mode data is negligible.
机译：与常规雷达高度计（CRA）相比，合成孔径雷达高度计（SARAL）是新一代雷达高度计，具有更高的高度精度和沿轨道的空间分辨率。由于使用合成孔径技术，SARAL数据处理和波形模型与CRA有很大不同。为了验证性能和数据处理算法，开发了SARAL机载实验系统。实验系统安装在Y-12飞机上，并于2014年10月获得了一些有效数据。在实验中获得了SAR模式的回波数据，并从SAR模式数据中提取了CRA模式的回波数据。两种模式具有相同的观测目标和误差源，因此它们的高度测量精度是可比的。结果表明，SARAL的距离测量精度提高了约1倍。 SAR模式数据和CRA模式数据的有效波高差异可忽略不计。

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