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
1秒前
完美世界应助西瓜藤子采纳,获得10
2秒前
哇咔咔应助木子采纳,获得10
3秒前
范慧晨完成签到,获得积分20
4秒前
6秒前
ly完成签到,获得积分10
7秒前
科研通AI2S应助咸鱼好翻身采纳,获得10
8秒前
科研通AI2S应助xiaxue采纳,获得10
9秒前
汤mou完成签到,获得积分10
12秒前
12秒前
totito关注了科研通微信公众号
14秒前
14秒前
脑洞疼应助and采纳,获得10
15秒前
benben发布了新的文献求助10
16秒前
16秒前
饺子生面包完成签到 ,获得积分10
18秒前
JamesPei应助连名语采纳,获得30
18秒前
自由的路灯关注了科研通微信公众号
19秒前
科研小狗发布了新的文献求助10
20秒前
不配.应助搞怪网络采纳,获得10
20秒前
21秒前
可爱的函函应助熊宜浓采纳,获得10
21秒前
21秒前
22秒前
Ricardo完成签到 ,获得积分10
22秒前
23秒前
威武从寒完成签到,获得积分10
23秒前
23秒前
23秒前
我一进来就看到常威在打来福完成签到,获得积分10
23秒前
25秒前
27秒前
绫小路绫完成签到,获得积分10
27秒前
搞怪网络应助文件撤销了驳回
27秒前
小胡发布了新的文献求助30
28秒前
威武从寒发布了新的文献求助10
28秒前
31秒前
31秒前
liao发布了新的文献求助10
31秒前
31秒前
高分求助中
Spray / Wall-interaction Modelling by Dimensionless Data Analysis 2000
Evolution 3rd edition 1500
ALA生合成不全マウスでの糖代謝異常の分子機構解析 520
Mathematics and Finite Element Discretizations of Incompressible Navier—Stokes Flows 500
A new species of Coccus (Homoptera: Coccoidea) from Malawi 500
2-Acetyl-1-pyrroline: an important aroma component of cooked rice 500
Handbook on People's China (1957) 400
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 3188816
求助须知:如何正确求助?哪些是违规求助? 2838235
关于积分的说明 8019183
捐赠科研通 2501105
什么是DOI,文献DOI怎么找? 1335264
科研通“疑难数据库(出版商)”最低求助积分说明 637492
邀请新用户注册赠送积分活动 605604