The sampling variability and the validation of high frequency radar measurements of the sea surface
The sampling variability and the validation of high frequency radar measurements of the sea surface
复制标题
海面高频雷达测量的采样变异性和验证
DOI：
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复制
发表时间：
1995
期刊：
影响因子：
--
通讯作者：
M. Šova
中科院分区：
文献类型：
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作者：
M. Šova
遥感正在成为研究海浪的一种日益重要的工具
测量，在过去的十年里，在
高频测波能力的发展
雷达。该系统能够进行详细的、近乎连续的观察
海面覆盖了一大片区域。然而，因为数学上的
数据提取过程相当困难，数据的统计属性
到目前为止，人们对观察到的数据知之甚少。
在本研究中，各种测量值的近似抽样分布
来自高频雷达(包括有效波高、平均波周期、
风向和各种谱参数)以
指已知的或可估量的数量。由此产生的信心
在有效波高和平均波周期的情况下，间隔是，
宽度与从相应的NURWEC2获得的宽度相当
(荷兰英国雷达波浮标实验对比)波浮标
测量，而在光谱功率的情况下，它们更窄。
此外，还推导出了可用于这种雷达测量的方法
与他们在统计上相应的波浪浮标测量值进行比较
有效的方式，并估计他们的相对偏差。这些方法就是
应用于NURWEC2现场试验期间获取的数据，这表明
雷达和海浪浮标显示出很好的测量一致性
有效波高和频谱功率(超过85%
-
125兆赫
-
这个
波能最大的频率，因此是最重要的频率)。
也有一个公平的对应的平均周期测量在
范围6.8
-
11.0秒。光谱平均方向显示出很好的一致性
超过85
-
在有些有限的定向范围内(即，
在NURWEC2风暴期间观察到的数据)。
Remote sensing is becoming an increasingly important tool for ocean wave
measurement, and over the past decade much progress has been made in
the development of the wave measuring capabilities of HF (High Frequency)
radar. This system is able to make detailed and near continuous observations
of the sea surface over a wide area. However, because the mathematics of
the data extraction process is rather difficult, the statistical properties of the
observed data have to date been poorly understood.
In this study, the approximate sampling distributions of a variety of measurements
from HF radar (including significant waveheight, mean wave period,
wind direction, and various spectral parameters) are derived in terms
of quantities that are either known or estimable. The resulting confidence
intervals are, in the case of significant waveheight and mean wave period,
of comparable width to those obtained from the corresponding NURWEC2
(Netherlands UK Radar Wave buoy Experimental Comparison) wave buoy
measurements, and in the case of spectral power, they are narrower.
Furthermore, methods are derived by which such radar measurements may be
compared with their corresponding wave buoy measurements in a statistically
valid manner, and their relative biases estimated. These methods are then
applied to data taken during the NURWEC2 field trial, which suggest that
the radars and the wave buoy show good correspondence for measurements
of significant waveheight and of spectral power (over 85
-
125mHz
-
the
frequencies with most wave power, and hence those of most importance).
There is also a fair correspondence for mean period measurements in the
range 6.8
-
11.0secs. Spectral mean direction shows good correspondence
over 85
-
155mHz over the somewhat limited directional range (i. e. as
observed during the NURWEC2 storm) of the data.
影响因子：
20.6
作者：
HARRIS, FJ
通讯作者：
HARRIS, FJ
我们是否对“善终”谈论得太多了？
DOI：
--
发表时间：
2022
期刊：
老年精神医学雑誌
影响因子：
--
作者：
ONO;Junichi;井並林太郎;永田靖;島薗進;岡村心平;Hiro Hirai;会田 薫子;Ono Motoi;髙岸輝;Hayato Kosuge;島薗進;護山真也;小菅隼人;Hiro Hirai;馬定延;島薗進;鈴木親彦;会田 薫子;Hiro Hirai;島薗進;馬定延;須川渡;会田 薫子;髙岸輝;護山真也;Hiro Hirai;神崎舞;安藤泰至
通讯作者：
安藤泰至