OBSERVATION OF CLOUD BASE HEIGHT THROUGH
DOUBLE LOCATION DIGITAL PHOTOGRAPHY SYSTEM

Tan Yongbo; Tao Shanchang1; Lǜ Weitao; Liu Yifeng

Vol.16, NO.5, 2005

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2005 > 16(5): 629-637

Tan Yongbo, Tao Shanchang1, Lǜ Weitao, et al. Observation of cloud base height through double location digital photography system. J Appl Meteor Sci, 2005, 16(5): 629-637.

Citation:

Tan Yongbo, Tao Shanchang1, Lǜ Weitao, et al. Observation of cloud base height through double location digital photography system. J Appl Meteor Sci, 2005, 16(5): 629-637.

Tan Yongbo, Tao Shanchang1, Lǜ Weitao, et al. Observation of cloud base height through double location digital photography system. J Appl Meteor Sci, 2005, 16(5): 629-637.

Citation:

Tan Yongbo, Tao Shanchang1, Lǜ Weitao, et al. Observation of cloud base height through double location digital photography system. J Appl Meteor Sci, 2005, 16(5): 629-637.

PDF( 435 KB)

OBSERVATION OF CLOUD BASE HEIGHT THROUGH DOUBLE LOCATION DIGITAL PHOTOGRAPHY SYSTEM

1.
School of Earth and Space Sciences, University of Science and Technology of China, Hefei230026
2.
Chinese Academy of Meteorological Sciences, Beijing100081

Received Date: 2004-09-06
Rev Recd Date: 2005-04-01
Publish Date: 2005-10-31

Abstract

Abstract

It is an extremely important and valuable work to develop advanced remote sensing system of macrophysical and microphysical cloud characters.A new method is proposed to observe cloud base height through g round-based double location dig ital photography system.In this system, cloud height is calculated in real time from displacement between two matching templates which are automatically searched from two all-sky nephog rams.Consistency is show n between cloud heights observed through double location and those through lidar in Luogang airport of Hefei.According to measurement error of cloud height, the observation should be performed under the preferential observing condition with baseline length as long as possible but less than 200 m, and angle of view variable in ±45°.Furthermore, the excellence and limitation of this method are discussed.
- Cloud Height;
- Double location;
- Digital photography;
- Image analysis

FullText(HTML)

References(9)

Figures and Tables

图 1 三维测距示意图

DownLoad: Full-Size Img PowerPoint

图 2 双站数字摄像测云高系统结构示意图

DownLoad: Full-Size Img PowerPoint

图 3 2003年8月26日16 :02(北京时, 下同)双站数字摄像测高云云高(云高7218 m)

(a)CCD1,(b)CCD2

DownLoad: Full-Size Img PowerPoint

图 4 2003年9月11日10 :53双站数字摄像测低云云高(云高1478 m)

(a)CCD1,(b)CCD2

DownLoad: Full-Size Img PowerPoint

图 5 订正后的云高对比图

DownLoad: Full-Size Img PowerPoint

图 6 云高统计对比图

DownLoad: Full-Size Img PowerPoint

图 7 测量误差与云高、入射光线视场角及基线长度的关系图

(a)误差与入射光线视场角ω以及基线长度的关系, (b)误差与云高z以及基线长度d的关系图(设匹配误差为两个像素点, 即入射光线视场角误差为0.08°)

DownLoad: Full-Size Img PowerPoint

表 1 系统参数

表 2 各区域云高以及平均云高

References

[1]	Long C N, DeLuisi J J.Development of an Automated Hemi spheric Sky Imager for Cloud Fraction Retrievals.Proceedings of the 10th Symposium on Meteorological Observations and Inst rumen tat ion, Phoenix Arizona1.1998.171～174.
[2]	霍娟, 吕达仁.全天空数字相机测量云量的初步研究.南京气象学院学报, 2002, 25(2):242～246. http://www.cnki.com.cn/Article/CJFDTOTAL-NJQX200202014.htm
[3]	Jia Z.Geometric Retrieval of Cloud Top Height from MISR Imagery.In :Optical Remote Sensing of the Atmosphere and Clouds.Proceedings of SPIE, Vol.3501, 1998.531～541.
[4]	谢兴生, 陶善昌, 周秀骥.数字摄像法测量气象能见度.科学通报,1999, 44(1):97～100. http://www.cnki.com.cn/Article/CJFDTOTAL-KXTB199901021.htm
[5]	吕伟涛, 陶善昌, 谭涌波, 等.数字摄像能见度观测系统中实用黑体技术的应用.应用气象学报, 2003, 14(6):691～699. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20030687&flag=1
[6]	吕伟涛, 陶善昌, 谭涌波.双亮度差方法测量白天气象能见度时的误差分析.应用气象学报, 2005, 16(5):619～628. http://qikan.camscma.cn/jams/ch/reader/view_abstract.aspx?file_no=20050580&flag=1
[7]	刘庆金.单点双站三角形交会法.测绘通报, 2001,(2):34～35. http://www.cnki.com.cn/Article/CJFDTOTAL-CHTB200103014.htm
[8]	袁伟, 金学军.双星定位的三参数方法及其精度分析.中国空间科学技术, 2003, (5):22～27. http://www.cnki.com.cn/Article/CJFDTOTAL-ZGKJ200305004.htm
[9]	何斌, 马天予, 王运坚, 等.Visual C ++ 数字图像处理.北京:人民邮电出版社, 2001.491～598.