标题： WHALES：一种针对卫星雷达高度计波形在海况应用中的优化重跟踪器 显示英文标题

标题： WHALES: an optimized retracker for satellite radar altimeter waveforms in sea state applications

摘要： 欧洲航天局海浪气候环境变化倡议数据库的最新版本采用专用算法（回溯器）重新处理了二十年的卫星高度计测量数据，并提供了全球海洋显著波高长期时间序列。本文描述了该算法（称为 WHALES）的主要特征，并分析了算法选择对测量物理的影响，特别是代价函数中残差加权分析的影响。此外，本文还从噪声降低和与现场观测数据的散射指数方面，分析了 WHALES 对海浪状态数据库的影响，特别关注沿海区域，在此区域，WHALES 相较于之前的方法主要提高了数据质量和数量。我们发现，在距离海岸线 5 公里处，应用本文讨论的回溯器后有效数据记录增加了 30%。 显示英文摘要

摘要： The latest version of the European Space Agency's Sea State Climate Change Initiative database adopts a dedicated algorithm (retracker) to reprocess two decades of satellite altimetry measurements and provide long time series of significant wave height in the global ocean. This paper describes the main characteristics of this algorithm, called WHALES, and analyzes the impact of algorithm choices on measurement physics, particularly the weighted analysis of residuals in the cost function. Moreover, the impact of WHALES on the sea state database is analyzed in terms of noise reduction and scatter index with in situ data, with a particular focus on the coastal zone, where WHALES primarily improves data quality and quantity compared to previous approaches. We found that valid data records increased by 30% at 5 km from the coast after applying the retracker discussed here.