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INFORMATIC SYSTEMS USED FOR COMBATING HAIL

Constantin Şulea, Faculty for Electromechanical, Environment and Industrial Informatics Engineering, University of Craiova, ROMANIA

Gheorghe Manolea, Faculty for Electromechanical, Environment and Industrial Informatics Engineering, University of Craiova,, ROMÂNIA

ABSTRACT : This paper presents a computer system for monitoring national hail system. It is presented a computer system worldly known; it is proposed a specific computer system for anti-hailnetwork in Roumania witch completes the known systems with informatics subsystems specific for both coordination missiles, release automation, and also power supply.The computer system comprises two main components: a system for taking the decision of launch andthe system for assisting the launch decision. The integrated information system for monitoring thelaunch anti hail rockets units enables: an increased efficiency by shortening the time for action, a goodorganization, a high degree of security.

Key-words: monitoring, GIS, antihail, informatic system

1. INTRODUCTION

A national anti-hail system was established in our country in 1999 [26], and recently wasestablished a National Authority [27] against the hail fall and for the stimulation of therainfall. During the mentioned period were developed a lot of research activities and presentlythere are concerns for the extension of these activities through doctoral researches, throughinternational, cross-border or regional partnerships researches. It can be said that themanagement of the hail fall and the rainfall stimulation has become, in our country, a current preoccupation.The paper proposes a specific computer system for anti-hail network in Romania that adds theknown systems with specific informatics subsystems for the coordination missiles, for therelease automation, and also for the power supply.

2. THE KNOWN WORLDWIDE COMPUTER SYSTEMS

The HASIS system is one of the few dedicated systems used to prevent damage caused by the fallinghail [7]. This system integrates the information provided by 13 radar centers located in various partsof the protected region and more than 1,600 anti hail stations.The system has real-time digital processing for: the radar signals, the visualization of the radar data,the detection in real-time of hail cells, GIS support for calculating the parameters of action (elevation,azimuth, anti-hail station, rocket type, end method of seeding).As a consequence of the receivedinformation from the radar system, the system allows an integrated view of the radar image, of thetopographical map and of the vector layers. It also offers support for a various types of radar products: reflexivity, wind, spectral width, differential reflexivity. An important providedelement is the application of coordination efficient with the air traffic control center. The



seeding process is supported by the following features: the simulation of seeding and theapplication for analyzing the seed, the calculation of the parameters for seeding based on 3Dreflective array.The advanced features of HASIS 3D system allow you to view 3D integrated terrain and 3Disosurface of the cloud, an image of this facility is shown in Figure 1. Figure 2 illustrates a

multiple isometric 3D view of the cloud. The view of the seeding missile trajectories isanother advanced feature, shown in Figure 3. The view of the isometric horizontal andvertical sections allows the accurate determination of the intervention area (Figure 4).

Figure 1. View 3D Isosurface Figure 2. Multiple View 3D isosurface

Figure 3. View 3D missile trajectories Figure 5. Isometric horizontal andvertical viewing sections

2. PROPOSED COMPUTER SYSTEM FOR ANTIHAIL NETWORK INROMANIA

The computer system proposed is a set of hail policies, procedures, activities and equipmentscorrelated informational and functionality in order to ensure prevention of damages caused byhail.



As the time between when the last update of the clouds and the time for ordering a shooting to be as short as possible it is necessary to integrate various input sizes so that the operator should have as much information as pooled into a "screen".The main layers of information - the input sizes are related to: the evolution of clouds,topography and cultivated areas, launch points and organizational elements.

The cloudy situation of the protected region is very important, intervention will take placeonly if the weather radar indicates the presence of hail or its risk figure 7.

Figure 7. Example of the evolution of clouds in Romania and in Oltenia

In Figure 8 are symbolically presented planted areas to be protected, represented byrectangular polygons of different colors: green, blue, yellow, orange, red symbolizing the typeof each crop (fruit trees, vines, wheat, maize, etc.); the coordinates of the launch point and thecentral point are represented by blue dots and respectively red dots. The range of launchramps is also important, it is highlighted the area which is covered by a central point. Theaccess roads and their types (agricultural, county, national, European) are highlighted for prompt intervention in case of failure.

The main output of this system is the operator's decision. The local point decided is accessedthrough an application that connects to the decision support system for launch.

Figure 8. GIS's symbolic representation

Local Point 1

Local Point 4

Local Point 3

Local Point 2

Local Point 5

Central Point 1



The main sizes of input for this system are:- the ramp launch number - for a secure identification by the operator - the battery voltage – the checking the available of the energy supply system; due to

prioritization system of the consumers it will always be ensured the minimum energy for positioning ramp and release heat [8].

- Confirmation of the presence hail clouds - an element of safety before launch- Confirmation of the free air space - a safety element before launching- Opening / Closing inside ramp - an element of security and protection of the launch

ramp- Positioning elements: azimuth and the elevation- Number and position of presence the rocket on the ramp - thus ensuring control over the

activity of launching and loading ramp- The choice to missile for launching- The altitude of explosion – for a higher efficiency of fighting against hail fall it is

important the place of seeding in the cloud, and this is achieved by positioning a ramp and by programming rocket altimeter.The main output data will be represented by positioning the ramp, by firing order and by thedaily-monthly shooting report.Interface shown in Figure 9 was made with the help of Visual Basic 6.

Figure 9. Computerized decision support system interface

This work was partially supported by the strategic grant POSDRU/88/1.5/S/50783, ProjectID50783 (2009), co-financed by the European Social Fund – Investing in People, within theSectoral Operational Programme Human Resources Development 2007-2013.

4. CONCLUSIONS

The systems of risk management have begun to have an increasingly higher importance,mainly due to the devastation caused by climate change. Thus, the anti-hail systems have seena great evolution in the late twentieth century.The anti-hail systems with increased efficiency are based on the principle of seeding clouds both in the air and land. Due to the evolution of the radar systems and of the dedicated



software, the cloud is no longer perceived as an object but as a physical-chemical process inwhich are important the exact areas of intervention in order to produce favorable changes.The most effective systems for combating hail prove those using seeding clouds with rockets because they can be used in all conditions and allow the cloud seeding in the desired volumes.The informatic system for the Roumania anti-hail network comprises two main components:

the system for taking the decision of launch and decision support system for launch.The achievement of an integrated information system for monitoring the launch anti-hailrockets units will allow: an increasing efficiency by reducing the intervention time, a better organization, a degree of security.In the future it would be desirable, the achievement of systems that allow an analysis of intervention effects on clouds carry hail, like the system presented HASIS.

REFERENCES

[1]Alboteanu L., Cercetări privind utilizarea energiei solare pentru alimentareaconsumatorilor electrici din staţiile antigrindină izolate, Teza doctorat, 2009

[2]Alboteanu L., Manolea Gh., ŞULEA C., Aspects regarding to energy efficiency of standalone photovoltaic system used for anti hail stations, CNAE 2010, Craiova

[3]Alboteanu L., Şulea C., Sistem fotovoltaic autonom pentru alimentarea consumatorilor electrici din staţiile antigrindină izolate, CNSNRE 2010, Târgovişte

[4]ŞULEA C., Alboteanu L., Manolea Gh., Sisteme informatice aplicate in reţeleleantigrindină, SINGRO2010, Bucuresti

[5]Zugravescu D., Manolea Gh., Alboteanu L.,Şulea C., Anti-hail system - geonomiccomponent of modern science, RIMA 10, WSEAS Bucuresti, aprilie 2010

[6] *** - http://www.cloud-seeding.com[7] *** - http://www.weathermod-bg.eu[8] *** - http://meteoradar.hit.bg/pbv_bme.html[9] *** - HOTĂRÂRE nr.604 din 28 iulie 1999 privind aprobarea Programului de realizare a

Sistemului naţional antigrindină şi de finanţare a acestuia[10] *** - HG nr. 601/2009 privind aprobarea Regulamentului de organizare şi funcţionare al

Administraţiei Sistemului naţional antigrindină şi de creştere a precipitaţiilor, a Structuriiorganizatorice a Administraţiei Sistemului naţional antigrindină şi de creştere a precipitaţiilor şi a unităţilor din subordine.

[11]*** - http://pangeis.com/[12]*** - Sisteme autonome automatizate - surse de alimentare cu energie electrică a

consumatorilor serviciilor antigrindină, folosind energia solara si eoliana. Contract CIITT575/2000 -ANSTI, in colaborare cu Universitatea Tehnica a Moldovei 2000,2001,2002

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