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
刚刚
YaoHui完成签到,获得积分10
1秒前
FashionBoy应助青岚采纳,获得10
2秒前
要什么自行车完成签到,获得积分10
2秒前
孙绪鹏完成签到,获得积分20
2秒前
3秒前
3秒前
3秒前
黄子完成签到,获得积分20
3秒前
我是萨比发布了新的文献求助10
5秒前
顾矜应助YaoHui采纳,获得20
5秒前
cx完成签到,获得积分20
5秒前
6秒前
6秒前
6秒前
7秒前
姚芭蕉发布了新的文献求助10
7秒前
顽固分子发布了新的文献求助10
8秒前
研友_ngJQzL发布了新的文献求助10
8秒前
8秒前
8秒前
深情安青应助科研通管家采纳,获得10
9秒前
完美世界应助科研通管家采纳,获得10
9秒前
JV完成签到,获得积分10
9秒前
科研通AI2S应助科研通管家采纳,获得10
9秒前
9秒前
9秒前
隐形曼青应助科研通管家采纳,获得20
10秒前
脑洞疼应助科研通管家采纳,获得10
10秒前
思源应助科研通管家采纳,获得10
10秒前
桐桐应助科研通管家采纳,获得10
10秒前
10秒前
赘婿应助科研通管家采纳,获得30
10秒前
赘婿应助科研通管家采纳,获得10
10秒前
小马甲应助科研通管家采纳,获得10
10秒前
彭于晏应助科研通管家采纳,获得10
10秒前
Andrew02应助科研通管家采纳,获得10
10秒前
赘婿应助科研通管家采纳,获得10
11秒前
大个应助科研通管家采纳,获得10
11秒前
Jasper应助科研通管家采纳,获得30
11秒前
高分求助中
Evolution 3rd edition 1500
保险藏宝图 1000
Lire en communiste 1000
Mantiden: Faszinierende Lauerjäger Faszinierende Lauerjäger 700
PraxisRatgeber: Mantiden: Faszinierende Lauerjäger 700
A new species of Coccus (Homoptera: Coccoidea) from Malawi 500
2-Acetyl-1-pyrroline: an important aroma component of cooked rice 500
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 3181459
求助须知:如何正确求助?哪些是违规求助? 2831701
关于积分的说明 7986194
捐赠科研通 2493698
什么是DOI,文献DOI怎么找? 1330255
科研通“疑难数据库(出版商)”最低求助积分说明 635954
版权声明 602955