1. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 1 OTT Parsivel Enhanced Precipitation Identifier / PWS: Laser-based optical system for simultaneous measurement of particle size and velocity in precipitation

2. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 2 Design with two heads No catching losses due to wind effect, no bucket or vessel Wide intensity range 0,001 to 1200 mm/h Velocity: 0,2 to 20 m/s Sizes: 0,2 to 25 mm Reports according WMO codes OTT Parsivel ®

3. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 3 The sensor's transmitter unit generates a flat, horizontal beam of visible red laser light, which the receiver unit converts into an electric signal. The absolute amplitude can even change, only dynamic radiometric signal changes gets considered whenever a particle falls through the beam anywhere within the measurement area. The ratio of dimming is direct related to the particles size, and in correlation with duration of the extinction, the fall velocity can be derived. OTT Parsivel ® - The Principle

4. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 4 OTT Parsivel ® - Type Of Precipitation: Rain Accumulated particles in 60 second interval Drop speed like Gunn-Kinzer distribution (dashed line) Rain because large number of drops on the Gunn-Kinzer curve Derivation to water equivalent Drops with different shapes relating to sizes and speed Distinguish of different types of liquid precipitation: drizzle, rain, mixed form in light moderate and heavy classes

5. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 5 Accumulated particles in 60 second interval Particle speed like Locatelli and Hobbs distribution (dotted line) Particle speed is very slow Snow because large slow particle, on or near by the Locatelli and Hobbs curve Distinguish of solid precipitation: snow, grain, hail and mixed form in light, moderate and heavy classes OTT Parsivel ® - Type Of Precipitation: Snow

6. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 6 OTT Parsivel ® - Operating Software Drop distribution: 32 classes of size and speed Intensity and accumulation of precipitation WMO reports: WaWa, WW, Metar, Speci, NWS Visibility in precipitation Radar reflectivity Laser energy Number of particles Measuring interval Housekeeping data: heater power, supply voltage, sensor status, temperature

7. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 7 Interfaces and System Applications

8. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 8 Features and high lights Fully configurable data string in sequence and content, fexibility for wide range of datalogger market Software controlled heating device for mains ( 50 W ) and medium solar power applications ( 2 W ) Configuration and expert spectrum evaluation SW ASDO Calibrated precipitation parameter, optical precipitation sensor for unattended operation Automatic self adjustment at no precipitation event concerning temperature, laser alteration and condamination of optics Sensor for unattended operation, no further calibration or maintenance required at the sites.

9. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 9 Features and high lights Patented extinction method for simultaneous measurement of particles size and velocity Only one version and fully configurable for all applications Multipurpose instrument for PWS, optical precipitation sensor, spectrum distribution and energy, radar reflectivity and visibility in precipitation (MOR) Multipurpose interfaces for RS 485, RS 422, SDI-12, Digital Output for state of precipitation and pulse related to 0,1mm Parallel operation of ASDO (PC-Monitoring and logging) and datalogger with SDI-12

10. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 10 Precipitation intensity - Hydrological Services - Water Boards - Flood Warning - Water Resources and Energy - Avalanche Warning Institute Present Weather Sensor Enhanced Precipitation Identifier - Meteorological Services - Avalanche Warning institutes - ASOS Systems Airports - Flood warning Systems - Water Resources and Energy Precipitation distribution and precipitation energy - Universities - Soil Research Institutes - Avalanche Warning Institutes Visibility Traffic Monitoring: - Road Weather Information System - Harbour Monitoring System -Heliport Monitoring System - Naval Market/Navigation Supplier Z/R-calculation - Weather Radar Supplier - Weather Radar Network PWS PD V MZ PI Market and customers

11. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 11 Calibration and Test Bench Calibration in production cell in full automation procedure Simulated reference particles in size and velocity by rotating precision disk Download of data field for laser related tolerances and coefficients, depending on size variation Factory Acceptance Test Protocol as individual test record Calibration and test device for weather Services concerning yearly quality inspection

12. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 12 Satellite Transmission GOES / Meteosat Satellite Data Collection Platforms Receiving Stations

13. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 13 User Interfaces 12 VDC Power Supply RS 232 and open protocol GPS Antenna, exact time and location Antenna clutch for Yagi Power safe mode LED indication Easy Use SW for configuration, test and antenna alignment

14. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 14 HDR transmission modes Certified transmission formats Meteosat (incl. MSG) Self-Timed Mode, Alarm Mode GOES 100, 300 bps; Self-Timed Reporting Mode, Random Reporting Mode International channels (IDC)

15. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 15 Direct Readout Ground Station Private Ethernet ~ 2.5 Mbyte/sec TCP/IP on Ethernet Antenna 5 m Dish ~ 1.6 GHz DCP Acquisition Down converter  ~ 150 MHz DSR II HYDRAS 3 + Communication manager

16. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 16 Meteosat footprint 2nd satellite at 63°E available!!

17. HACH/OTT EnvironmentalInternational Sales MeetingJanuary 2006 17 GOES Footprint GOES 10 (WEST) GOES 12 (EAST)