Retrieval of high spatial resolution precipitable water vapor maps using heterogeneous earth observation data

遥感 可降水量 地球观测 水蒸气 环境科学 图像分辨率 气象学 地质学 卫星 计算机科学 地理 物理 人工智能 天文
作者
Xiongwei Ma,Yibin Yao,Zhejing Bao,Changyong Hé
出处
期刊:Remote Sensing of Environment [Elsevier]
卷期号:278: 113100-113100 被引量:16
标识
DOI:10.1016/j.rse.2022.113100
摘要

The determination of the amount of precipitable water vapor (PWV) from global navigation satellite system (GNSS) is restricted to a limited number of ground-based stations with low spatial resolution. The PWV obtained by the multi-source data fusion method has a low spatial resolution because of the low spatial resolution of the data used. Therefore, it is difficult to retrieve PWV maps with sub-km resolution. Therefore, retrieving PWV with high spatial resolution becomes the focus of this study. A dual-scale method for retrieving PWV maps, based on heterogeneous earth data, is proposed, which can obtain sub-kilometer resolution PWV, while maintaining accuracy. First, an approach for analyzing the spatial correlation between land cover types (LCT) and ground-based PWV was proposed, and the meteorological, ecological, topographic, and LCT variables affecting changes in PWV in the near-earth atmosphere were determine, Subsequently, three different regression models, including multiple linear regression (MLR), random forest (RF), and a generalized regression neural network (GRNN), were used to construct the functional model linking heterogeneous earth observation data and ground-based GNSS-derived PWV. Finally, the PWV map with sub-kilometer resolution was generated based on the dual-scale method. Unlike the PWV obtained by data fusion and remote sensing technology, the proposed dual-scale retrieval method can generate PWV maps at 300 m spatial resolution. Statistical analyses demonstrated that the RMS of the PWV derived from the proposed method was less than 2.2 mm, and the bias was close to 0, thereby filling the gap in the sub-kilometer high-precision PWV products. • Spatial correlation between land cover types and GNSS PWV was analyzed firstly. • The functional relationship between heterogeneous data and GNSS PWV is established. • A dual-scale approach for retrieving PWV with sub-kilometer resolution is proposed. • The RMS of dual-scale PWV was less than 2.2 mm, and the bias was close to 0.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
大幅提高文件上传限制,最高150M (2024-4-1)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
支葵发布了新的文献求助10
2秒前
阿冰发布了新的文献求助10
2秒前
椰子发布了新的文献求助10
2秒前
2秒前
不喝奶茶发布了新的文献求助10
4秒前
我要挣钱发布了新的文献求助10
5秒前
安静的雪完成签到,获得积分10
5秒前
维尼完成签到,获得积分10
6秒前
6秒前
6秒前
失重心跳发布了新的文献求助10
6秒前
开放冷风发布了新的文献求助10
7秒前
如寄完成签到 ,获得积分10
8秒前
YMM完成签到,获得积分10
8秒前
10秒前
单于思雁完成签到,获得积分10
10秒前
10秒前
10秒前
10秒前
11秒前
CodeCraft应助晓xiao采纳,获得10
12秒前
受伤的平安应助油菜花采纳,获得150
12秒前
小李完成签到,获得积分10
12秒前
13秒前
九湖夷上发布了新的文献求助10
13秒前
淡淡酬海完成签到,获得积分10
14秒前
逆流的鱼完成签到,获得积分10
15秒前
15秒前
爆米花应助小小谢采纳,获得10
16秒前
1111发布了新的文献求助10
16秒前
16秒前
潇洒的宛菡完成签到,获得积分10
17秒前
18秒前
支葵完成签到,获得积分10
19秒前
禁止吃桃完成签到 ,获得积分10
21秒前
小司发布了新的文献求助10
21秒前
淡淡酬海发布了新的文献求助10
21秒前
22秒前
22秒前
23秒前
高分求助中
Spray / Wall-interaction Modelling by Dimensionless Data Analysis 2000
Write Like a Chemist: A Guide and Resource (第二版) 600
Mixed-anion Compounds 600
A new species of Velataspis (Hemiptera Coccoidea Diaspididae) from tea in Assam 500
Earth System Geophysics 500
Aspects of Babylonian celestial divination: the lunar eclipse tablets of Enūma Anu Enlil 500
Geochemistry, 2nd Edition 地球化学经典教科书第二版 401
热门求助领域 (近24小时)
化学 医学 生物 材料科学 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 基因 遗传学 催化作用 物理化学 免疫学 量子力学 细胞生物学
热门帖子
关注 科研通微信公众号,转发送积分 3199768
求助须知:如何正确求助?哪些是违规求助? 2848897
关于积分的说明 8068542
捐赠科研通 2513243
什么是DOI,文献DOI怎么找? 1346037
科研通“疑难数据库(出版商)”最低求助积分说明 640167
邀请新用户注册赠送积分活动 609877