Results 171 to 180 of about 18,321 (219)

Monitoring changes in the landscape water balance: validation of satellite- and model-based evapotranspiration data in Lusatia, Germany. [PDF]

Environ Monit Assess
Kröcher J, Ghazaryan G, Spank U, Zimmermann B, Beyrich F, Dietrich O, Markwitz C, van Ramshorst J, Callejas-Rodelas JÁ, Lischeid G.   +9 more
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Remote sensing of lightning by a ground-based microwave radiometer

Atmospheric Research, 2014
Abstract Based on the theory of thermal radiation and its transfer in the atmosphere, the response of a ground-based microwave radiometer to a lightning-superheated cylinder in the atmosphere is studied and the theoretical expressions are given for the relationship between brightness temperatures and parameters such as distance, size, duration and ...
Zhenhui Wang, Qing Li, Fangchao Hu, Xuefen Cao, Yanli Chu   +4 more
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Analysis and improvement of tipping calibration for ground-based microwave radiometers

IEEE Transactions on Geoscience and Remote Sensing, 2000
The tipping-curve calibration method has been an important calibration technique for ground-based microwave radiometers that measure atmospheric emission at low optical depth. The method calibrates a radiometer system using data taken by the radiometer at two or more viewing angles in the atmosphere. In this method, the relationship between atmospheric
null Yong Han, E.R. Westwater
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Miniaturization of a ground-based microwave radiometer-scatterometer

2002 3rd International Conference on Microwave and Millimeter Wave Technology, 2002. Proceedings. ICMMT 2002., 2003
A ground-based millimeter radiometer-scatterometer has been miniaturized as a portable instrument. This portable instrument is much smaller than ordinary ones, and can highly facilitate remote sensing measurements. The miniaturization methods for the radiometer-scatterometer system have been introduced and discussed in detail in this paper.
null Zhao Hengkai, null Fang Zhenhe, null Yao Chuanliang, null Li Yi, null Cai Chunfu   +4 more
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Retrieval of Soil Moisture Using Ground-Based Microwave Radiometer

2010 International Conference on Multimedia Technology, 2010
It is well known that microwave emission from soil is very well correlated to its moisture content. One experimental area near Changchun was selected for the research of retrieval of soil moisture from C-band microwave radiometer. Measurements were carried out on bare smooth soils, bare soils with ridge, dry grass covered soils and standing straw ...
Yanqing Wu, Kaishan Song, Kai Zhao, Zongming Wang, DianWei Liu, Jia Du, Xiaochun Lei, Bai Zhang   +7 more
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A new calibration technique for ground-based microwave radiometer

ISAPE2012, 2012
A new calibration method for ground-based radiometer is proposed herein. In this method, the relationship between atmosphere opacity and viewing angle is used as a constraint for deriving the system calibration response. The brightness temperatures have been compared that calculated with the absorption model of Liebe's MPM and measured by the QWF-2 ...
Hengmin Han, Tingting Shu, Lixin Guo, Zhenwei Zhao, Jiangman Li, Le-Ke Lin   +5 more
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A ground‐based microwave radiometer dedicated to stratospheric ozone monitoring

Journal of Geophysical Research: Atmospheres, 1998
A microwave radiometer has been developed for long‐term measurements of strato‐mesospheric ozone profiles at midlatitudes. The instrument located at the Bordeaux Observatory, France (45°N) is operated in the framework of the French atmospheric station, of the European Alpine station belonging to the Network for the Detection of Stratospheric Change ...
J. de La Noë, O. Lezeaux, G. Guillemin, R. Lauqué, P. Baron, P. Ricaud   +5 more
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Rainfall Intensity Estimation by Ground-Based Dual-Frequency Microwave Radiometers

Journal of Applied Meteorology, 2001
Abstract Many investigators have used satellite data to derive rainfall intensity and to compare them with rain gauge data. However, there has always been a problem: what is the optimal time period for the two different types of data? A set of well-controlled data collected by ground-based dual-frequency microwave radiometers at the National Central ...
Gin-Rong Liu, Chung-Chih Liu, Tsung-Hua Kuo   +2 more
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A field experiment over wheat with ground-based microwave radiometer

SPIE Proceedings, 2010
A field experiment was performed in winter wheat farmland at Baoding (Hebei province, China) from 13 Feb. 2009 to 19 Feb. 2009. In the experiment, brightness temperature of 8 channels (6.925GHz, 10.65GHz, 18.7GHz and 36.5GHz, horizontal and vertical polarization of each frequency), soil moisture, land surface temperature, snow character, and sublayer
Shengli Wu, Shaojie Zhao
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Monitoring the stratospheric ozone profile with ground-based microwave radiometer

Proceedings of IGARSS '94 - 1994 IEEE International Geoscience and Remote Sensing Symposium, 2002
The destructive effects of stratospheric pollution (e.g. CFC-compounds) to the atmospheric ozone have been known for several years. Continuous monitoring of ozone in the stratosphere helps us to learn more about the chemistry of ozone in the atmosphere.
J. Heilimo, J. Talvela, M. Hallikainen
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