当前位置: X-MOL 学术J. Indian Soc. Remote Sens. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Evaluation of Winds from SCATSAT-1 and ASCAT Using Buoys in the Indian Ocean
Journal of the Indian Society of Remote Sensing ( IF 2.5 ) Pub Date : 2021-04-13 , DOI: 10.1007/s12524-021-01335-4
Anuradha Modi , Suresh Kumar Munaka , R. Harikumar , T. M. Balakrishnan Nair , K. Srinivas

Over the data sparse oceanic region, ocean surface winds from scatterometers on-board satellites play a crucial role to make accurate Numerical Weather Prediction model-based analysis. In the present study, ocean surface winds derived from the recently launched SCATSAT-1 for the year 2017 over the Indian Ocean are validated against the winds from the Moored and RAMA buoys. The validation results for ASCAT winds for the same period are also presented. The comparison of SCATSAT-1 (ASCAT) winds against offshore OMNI buoy winds indicates that the mean differences for wind speed and wind direction are 0.5 m/s and – 1.0° (0.39 m/s and – 4.0°), and the RMSEs are 1.44 m/s and 23.0° (1.17 m/s and 25.0°), respectively. For the coastal OMNI buoys, the SCATSAT-1 (ASCAT) indicated that the mean differences for wind speed and wind direction are 1.6 m/s and – 5° (1.15 m/s and – 0.4°), and the RMSEs are 2.65 m/s and 46 deg, (2.1 m/s and 51°), respectively. Quantified differences are almost similar for the comparison of SCATSAT-1/ASCAT with RAMA buoys. Overall, the quantified differences in the wind speed and direction between the SCATSAT-1 and buoys are closer to the satellite’s mission specifications of 1.8 m/s and 20°, respectively, and at par with the ASCAT accuracies. The capability of SCATSAT-1 winds to capture a cyclonic storm OCKHI during December 2017 also is depicted. The present study endorses that the SCATSAT-1 data are accurate and reliable and can be used in Numerical Weather Prediction (NWP) models and also for other applications.



中文翻译:

利用浮标评估印度洋中SCATSAT-1和ASCAT的风

在数据稀疏的海洋区域,机载卫星散射仪产生的海面风在进行精确的基于数值天气预报模型的分析中起着至关重要的作用。在本研究中,对来自印度洋上最近发射的2017年SCATSAT-1的海面风进行了验证,以对抗系泊浮标和RAMA浮标的风。还介绍了同期ASCAT风的验证结果。SCATSAT-1(ASCAT)风与海上OMNI浮标风的比较表明,风速和风向的平均差为0.5 m / s和– 1.0°(0.39 m / s和– 4.0°),RMSE为分别为1.44 m / s和23.0°(1.17 m / s和25.0°)。对于沿海OMNI浮标,SCATSAT-1(ASCAT)表示风速和风向的平均差为1。6 m / s和– 5°(1.15 m / s和– 0.4°),RMSE分别为2.65 m / s和46度(2.1 m / s和51°)。将SCATSAT-1 / ASCAT与RAMA浮标进行比较,定量差异几乎相似。总体而言,SCATSAT-1和浮标之间风速和风向的量化差异分别更接近卫星的任务规格1.8 m / s和20°,与ASCAT的精度相当。还描述了SCATSAT-1风在2017年12月捕获气旋风暴OCKHI的能力。本研究支持SCATSAT-1数据准确可靠,可用于数值天气预报(NWP)模型以及其他应用。将SCATSAT-1 / ASCAT与RAMA浮标进行比较,定量差异几乎相似。总体而言,SCATSAT-1和浮标之间风速和风向的量化差异分别更接近卫星的任务规格1.8 m / s和20°,与ASCAT的精度相当。还描述了SCATSAT-1风在2017年12月捕获气旋风暴OCKHI的能力。本研究支持SCATSAT-1数据准确可靠,可用于数值天气预报(NWP)模型以及其他应用。将SCATSAT-1 / ASCAT与RAMA浮标进行比较,定量差异几乎相似。总体而言,SCATSAT-1和浮标之间风速和风向的量化差异分别更接近卫星的任务规格1.8 m / s和20°,与ASCAT的精度相当。还描述了SCATSAT-1风在2017年12月捕获气旋风暴OCKHI的能力。本研究支持SCATSAT-1数据准确可靠,可用于数值天气预报(NWP)模型以及其他应用。并与ASCAT的准确性相当。还描述了SCATSAT-1风在2017年12月捕获气旋风暴OCKHI的能力。本研究支持SCATSAT-1数据准确可靠,可用于数值天气预报(NWP)模型以及其他应用。并与ASCAT的准确性相提并论。还描述了SCATSAT-1风在2017年12月捕获气旋风暴OCKHI的能力。本研究支持SCATSAT-1数据准确可靠,可用于数值天气预报(NWP)模型以及其他应用。

更新日期:2021-04-13
down
wechat
bug