Experimental calibration of a cost-effective X-band weather radar for climate ecological studies in southern Ecuador

2006 ◽  
Vol 79 (3-4) ◽  
pp. 296-316 ◽  
Author(s):  
Rütger Rollenbeck ◽  
Jörg Bendix
Keyword(s):  
Weather Radar ◽  
Cost Effective ◽  
Ecological Studies ◽  
Experimental Calibration ◽  
X Band ◽  
Southern Ecuador

scholarly journals RadarNet-Sur First Weather Radar Network in Tropical High Mountains

2017 ◽  
Vol 98 (6) ◽  
pp. 1235-1254 ◽  
Author(s):  
Jörg Bendix ◽  
Andreas Fries ◽  
Jorge Zárate ◽  
Katja Trachte ◽  
Rütger Rollenbeck ◽  
...  
Keyword(s):  
El Niño ◽  
Weather Forecasting ◽  
El Nino ◽  
Weather Radar ◽  
Cost Effective ◽  
Radar Signal ◽  
High Mountains ◽  
Radar Network ◽  
X Band ◽  
Southern Ecuador

Abstract Weather radar networks are indispensable tools for forecasting and disaster prevention in industrialized countries. However, they are far less common in the countries of South America, which frequently suffer from an underdeveloped network of meteorological stations. To address this problem in southern Ecuador, this article presents a novel radar network using cost-effective, single-polarization, X-band technology: the RadarNet-Sur. The RadarNet-Sur network is based on three scanning X-band weather radar units that cover approximately 87,000 km2 of southern Ecuador. Several instruments, including five optical disdrometers and two vertically aligned K-band Doppler radar profilers, are used to properly (inter) calibrate the radars. Radar signal processing is a major issue in the high mountains of Ecuador because cost-effective radar technologies typically lack Doppler capabilities. Thus, special procedures were developed for clutter detection and beam blockage correction by integrating ground-based and satelliteborne measurements. To demonstrate practical applications, a map of areas frequently affected by intense rainfall is presented, based on a time series of one radar that has been in operation since 2002. Such information is of vital importance to, for example, infrastructure management because rain-driven landslides are a major issue for road maintenance and safety throughout Ecuador. The presented case study of exceptionally strong rain events during the recent El Niño in March 2015 highlights the system’s practicality in weather forecasting related to disaster management. For the first time, RadarNet-Sur warrants a spatial-explicit observation of El Niño-related heavy precipitation in a transect from the coast to the highlands in a spatial resolution of 500 m.

X-Band local area weather radar – preliminary calibration results

2002 ◽  
Vol 45 (2) ◽  
pp. 135-138 ◽  
Author(s):  
N.E. Jensen
Keyword(s):  
High Resolution ◽  
Weather Radar ◽  
Cost Effective ◽  
Local Area ◽  
Rain Gauges ◽  
X Band ◽  
Danish Meteorological Institute ◽  
Typical Range ◽  
Meteorological Institute ◽  
Good Calibration

DHI has developed a cost-effective X-Band Local Area Weather Radar (LAWR) with a typical range (radius) of 60 km, 500 × 500 m areal resolution and 253 reflection levels. The development is performed in a co-operation with a number of European partners, including Danish Meteorological Institute. The specifications of the weather radar and preliminary results from the calibration are presented. Good calibration results have been obtained using high-resolution rain gauges.

scholarly journals Rainfall Information System Based on Weather Radar for Debris Flow Disaster Mitigation

2018 ◽  
Vol 7 (4.44) ◽  
pp. 165 ◽  
Author(s):  
Ratih Indri Hapsari ◽  
Gerard Aponno ◽  
Rosa Andrie Asmara ◽  
Satoru Oishi
Keyword(s):  
Information System ◽  
Debris Flow ◽  
Weather Radar ◽  
Active Volcano ◽  
Radar Data ◽  
Disaster Mitigation ◽  
Web Based ◽  
X Band ◽  
Secondary Hazards ◽  
Debris Flow Disaster

Rainfall-triggered debris flow has caused multiple impacts to the environment. It. is regarded as the most severe secondary hazards of volcanic eruption. However, limited access to the active volcano slope restricts the ground rain measurement as well as the direct delivery of risk information. In this study, an integrated information system is proposed for volcanic-related disaster mitigation under the framework of X-Plore/X-band Polarimetric Radar for Prevention of Water Disaster. In the first part, the acquisition and processing of high-resolution X-band dual polarimetric weather/X-MP radar data in real-time scheme for demonstrating the disaster-prone region are described. The second part presents the design of rainfall resource database and extensive maps coverage of predicted hazard information in GIS web-based platform accessible both using internet and offline. The proposed platform would be useful for communicating the disaster risk prediction based on weather radar in operational setting.  

scholarly journals Combined wind profiler-weather radar observations of orographic rainband around Kyushu, Japan in the Baiu season

2004 ◽  
Vol 22 (11) ◽  
pp. 3971-3982 ◽  
Author(s):  
Y. Umemoto ◽  
M. Teshiba ◽  
Y. Shibagaki ◽  
H. Hashiguchi ◽  
M. D. Yamanaka ◽  
...  
Keyword(s):  
Weather Radar ◽  
Horizontal Wind ◽  
Wind Component ◽  
Wind Profiler ◽  
Strong Wind ◽  
Clockwise Rotation ◽  
Weather Radars ◽  
X Band ◽  
Western Japan ◽  
Lifting Condensation Level

Abstract. A special observation campaign (X-BAIU), using various instruments (wind profilers, C-band weather radars, X-band Doppler radars, rawinsondes, etc.), was carried out in Kyushu (western Japan) during the Baiu season, from 1998 to 2002. In the X-BAIU-99 and -02 observations, a line-shaped orographic rainband extending northeastward from the Koshikijima Islands appeared in the low-level strong wind with warm-moist airs. The weather radar observation indicated that the rainband was maintained for 11h. The maximum length and width of the rainband observed in 1999 was ~200km and ~20km, respectively. The rainband observed in 2002 was not so developed compared with the case in 1999. The Froude number averaged from sea level to the top of the Koshikijima Islands (~600m) was large (>1), and the lifting condensation level was below the tops of the Koshikijima Islands. Thus, it is suggested that the clouds organizing the rainband are formed by the triggering of the mountains on the airflow passing over them. The vertical profile of horizontal wind in/around the rainband was investigated in the wind profiler observations. In the downdraft region 60km from the Koshikijima Islands, strong wind and its clockwise rotation with increasing height was observed below 3km altitude. In addition, a strong wind component perpendicular to the rainband was observed when the rainband was well developed. These wind behaviors were related to the evolution of the rainband.

Research on X-Band Weather Radar Network Based on Sensor Grid

2012 ◽  
Vol 468-471 ◽  
pp. 1274-1277
Author(s):  
Chen Li
Keyword(s):  
Weather Radar ◽  
Key Technology ◽  
Radar Systems ◽  
Radar Network ◽  
Additional Equipment ◽  
X Band ◽  
Architectural Framework ◽  
Information Advantage ◽  
New Generation ◽  
Network Advantage

Monitoring of precipitation using X-band weather radar systems is becoming popular. X-band weather radar network, as an additional equipment of China new generation weather radar, primarily used to measure weather echo within 3km above the ground and has a high prospect. The network, based on sensor grid, is greater information advantage and network advantage. This paper describes the design, the key technology and implementation of an architectural framework of the weather radar network based on sensor grid. The results show that the network works robustly in real time.

Improving the Accuracy of Rain Rate Estimates Using X-Band Phased-Array Weather Radar Network

2018 ◽  
Vol 56 (12) ◽  
pp. 6986-6994 ◽  
Author(s):  
Hiroshi Kikuchi ◽  
Tomoo Ushio ◽  
Fumihiko Mizutani ◽  
Masakazu Wada
Keyword(s):  
Rain Rate ◽  
Phased Array ◽  
Weather Radar ◽  
Radar Network ◽  
X Band

X-band Magnetron Dualpolarization Weather Radar

2019 ◽  
Author(s):  
Zhendong Yao ◽  
Xi Lou ◽  
Yongyan Su ◽  
Yong She ◽  
Lin Chen ◽  
...  
Keyword(s):  
Weather Radar ◽  
X Band
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