An intercomparison between directional wave spectra derived from Sentinel‐1 Synthetic Aperture Radar (SAR) satellites and a WAVEWATCH III model hindcast in the wider Australian region is presented. The coastal buoy network around Australia is considerably sparse, and only a handful of buoy measurements exist in deeper oceans. National and regional scale wave models require validation and verification through intercomparisons with available observations to be confidently adopted and improved. In the absence of dense in‐situ measurements, satellite‐derived surface wave data provide an invaluable and independent source of observations. Satellite altimeters provide well‐calibrated significant wave height data, but do not resolve wave directions, and are also not the platform of choice for resolving wave periods. SAR satellites that routinely map ocean surface waves fill this gap as they are able to measure directional wind‐wave spectra of long period waves. This constitutes an important satellite data stream for better understanding the propagation of swell waves across ocean basins, and for comparisons with national and down‐scaled wave models. However, both SAR wave measurements as well as wave models do not represent the truth and need qualification before regarding them as reliable data sets. The aim of this article is to perform an intercomparison of a wave model hindcast with SAR‐derived wave information in the wider Australian region. The comparisons are done in the context of mean wave climate and its seasonal variability, and demonstrate good agreement for wave heights and periods. Valuable insights into possible sources of disagreement are given.

中文翻译：

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Sentinel-1和WAVEWATCH III在澳大利亚各地的海洋膨胀比较

本文介绍了从Sentinel-1合成孔径雷达（SAR）卫星获得的定向波谱与在更广阔的澳大利亚地区后播的WAVEWATCH III模型之间的比较。澳大利亚周围的沿海浮标网络十分稀疏，在更深的海洋中仅存在少数浮标。国家和地区尺度波动模型要求通过与现有观测值进行比对来进行验证和验证，以便可靠地采用和改进。在缺乏密集的现场测量的情况下，卫星衍生的表面波数据提供了宝贵的独立观测资料。卫星高度计可提供经过良好校准的重要波高数据，但不能解析波向，也不是解决波周期的首选平台。例行绘制海洋表面波的SAR卫星填补了这一空白，因为它们能够测量长周期波的定向风波谱。这构成了重要的卫星数据流，以更好地了解浪涌在海盆中的传播，并与国家和缩小比例的海浪模型进行比较。但是，SAR波测量和波模型都不能代表真实情况，因此在将其视为可靠数据集之前需要进行鉴定。本文的目的是在澳大利亚更广泛的地区中，对后预报的海浪模型与SAR派生的海浪信息进行比较。比较是在平均浪潮气候及其季节变化的背景下进行的，并证明了在浪高和周期方面的良好一致性。