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OTT Parsivel Enhanced Precipitation Identifier / PWS: Laser-based
OTT Parsivel Enhanced Precipitation Identifier / PWS: Laser-based
OTT Parsivel®
OTT Parsivel®
OTT Parsivel® - The Principle
OTT Parsivel® - The Principle
OTT Parsivel® - Type Of Precipitation: Rain
OTT Parsivel® - Type Of Precipitation: Rain
OTT Parsivel® - Type Of Precipitation: Snow
OTT Parsivel® - Type Of Precipitation: Snow
OTT Parsivel® - Operating Software
OTT Parsivel® - Operating Software
Interfaces and System Applications
Interfaces and System Applications
Features and high lights
Features and high lights
Features and high lights
Features and high lights
Market and customers
Market and customers
Calibration and Test Bench
Calibration and Test Bench
Satellite Transmission
Satellite Transmission
User Interfaces
User Interfaces
HDR transmission modes
HDR transmission modes
Direct Readout Ground Station
Direct Readout Ground Station
Meteosat footprint
Meteosat footprint
GOES Footprint
GOES Footprint

Презентация на тему: «OTT Parsivel Enhanced Precipitation Identifier PWS: Laser-based optical system for simultaneous measurement of particle size and velocity in precipitation». Автор: Hohenstein, Fangmann, Vogelmann . Файл: «OTT Parsivel Enhanced Precipitation Identifier PWS: Laser-based optical system for simultaneous measurement of particle size and velocity in precipitation.ppt». Размер zip-архива: 1323 КБ.

OTT Parsivel Enhanced Precipitation Identifier PWS: Laser-based optical system for simultaneous measurement of particle size and velocity in precipitation

содержание презентации «OTT Parsivel Enhanced Precipitation Identifier PWS: Laser-based optical system for simultaneous measurement of particle size and velocity in precipitation.ppt»
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1 OTT Parsivel Enhanced Precipitation Identifier / PWS: Laser-based

OTT Parsivel Enhanced Precipitation Identifier / PWS: Laser-based

optical system for simultaneous measurement of particle size and velocity in precipitation

2 OTT Parsivel®

OTT Parsivel®

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

3 OTT Parsivel® - The Principle

OTT Parsivel® - The Principle

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.

4 OTT Parsivel® - Type Of Precipitation: Rain

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 OTT Parsivel® - Type Of Precipitation: Snow

OTT Parsivel® - Type Of Precipitation: Snow

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

6 OTT Parsivel® - Operating Software

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 Interfaces and System Applications

Interfaces and System Applications

8 Features and high lights

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 Features and high lights

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 Market and customers

Market and customers

Present Weather Sensor Enhanced Precipitation Identifier - Meteorological Services - Avalanche Warning institutes - ASOS Systems Airports - Flood warning Systems - Water Resources and Energy

Precipitation intensity - Hydrological Services - Water Boards - Flood Warning - Water Resources and Energy - Avalanche Warning Institute

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

PI

V

PD

MZ

11 Calibration and Test Bench

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 Satellite Transmission

Satellite Transmission

GOES / Meteosat Satellite

Data Collection Platforms

Receiving Stations

13 User Interfaces

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 HDR transmission modes

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 Direct Readout Ground Station

Direct Readout Ground Station

Antenna 5 m Dish ~ 1.6 GHz

Down converter ? ~ 150 MHz

DCP Acquisition

DSR II

HYDRAS 3 + Communication manager

Private Ethernet ~ 2.5 Mbyte/sec

TCP/IP on Ethernet

16 Meteosat footprint

Meteosat footprint

2nd satellite at 63°E available!!

17 GOES Footprint

GOES Footprint

GOES 10 (WEST)

GOES 12 (EAST)

«OTT Parsivel Enhanced Precipitation Identifier PWS: Laser-based optical system for simultaneous measurement of particle size and velocity in precipitation»
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