New Applications of Low Cost Rain Sensor “DROP”

1. New Applications of Low Cost Rain Sensor “DROP” Koldaev A.**, Gusev A.*, Konovalov D.**, Kutarov A.**, Miller E. ** *Roshydromet, Russia, ** Central Aerological Observatory, Roshydromet,Russia, *** State Hydrological Institute, Roshydromet, Russia

2. New Applications of Low Cost Rain Sensor “DROP” List of contents • LCR “DROP” • Construction • Field experiments • Current locations on the observational network • Present Weather Sensor • Theoretical background • Technical approach • Experimental results • Disdrometry • Theoretical background • Technical approach • Experimental results

3. New Applications of Low Cost Rain Sensor “DROP” Microwave receiver Microwave transmitter Analog to digit Converter Digital Processor ADSP-21061 ROM & Software Digit to Analog Converter LCR “DROP”Construction • The principal of operation is based on measurements of vertical velocities of rain drops by means of micro power Doppler radar working in continuous mode of radiation at frequency 11 GHz. • The system is consist with • Microwave receiver/transmitter working through the same horn antenna (Microwave module) • Low Frequency Amplifier (LFA) • The Digital Processor, performs FFT algorithm and all digital exchange functions LCR is made with all modern materials and common western type electronic components. It’s allow constructing compact reliable device with very powerful capacity.

4. New Applications of Low Cost Rain Sensor “DROP” Central Aerological Observatory, Dolgoprudny, Moscow Reg. September 2003 Alfa sample of LSR –11 on the experimental site of ATTEX. Comparisons of LCR –11 with the Russian Federation State Standard of Rain Precipitation on the experimental site of State Hydrological Institute. Valday, Novgorod Reg. May-September 2004. LCR “DROP”Field experiments The results of direct comparisons of LCR-11 with the Rain recorder P-2. The graphs of precipitation accumulation within about 7 hours. Valday, 28 August 2004. The results of comparisons with State Standard and Ground Mounted Standard within a whole month. (Valday, 1-31 August 2004). On the plot the 24 hours accumulated values are presented. P-2 data are presented also for reference only. As a result of field tests the big volume of experimental data was collected. This information allowed to improve the parts and whole construction of the device and to start the production of signal series of LCR “DROP” The influence of wind was investigated also, and it was experimentally proven that wind not decrease the accuracy, which is found in good agreement with the accuracy of State Standard.

5. New Applications of Low Cost Rain Sensor “DROP” 2007 2008 LCR “DROP”Today

6. New Applications of Low Cost Rain Sensor “DROP” Microwave receiver Microwave transmitter Analog to digit Converter Digital Processor ADSP-21061 ROM & Software Digit to Analog Converter LCR “DROP”Concept

7. New Applications of Low Cost Rain Sensor “DROP” << Present weather sensorTheoretical background , where (2) (1) (3) (4) (5) , where

8. New Applications of Low Cost Rain Sensor “DROP” Present weather sensorTechnical approach

9. New Applications of Low Cost Rain Sensor “DROP” Present weather sensorExperimental results

10. New Applications of Low Cost Rain Sensor “DROP” Microwave receiver Microwave transmitter Analog to digit Converter Digital Processor ADSP-21061 ROM & Software Digit to Analog Converter LCR “DROP”Concept

11. New Applications of Low Cost Rain Sensor “DROP” Vg DisdrometerTheoretical background

12. New Applications of Low Cost Rain Sensor “DROP” DisdrometerTechnical approach

13. New Applications of Low Cost Rain Sensor “DROP” DisdrometerExperimental results

14. New Applications of Low Cost Rain Sensor “DROP” DisdrometerExperimental results

15. New Applications of Low Cost Rain Sensor “DROP” Thank you for your attention Dr. Koldaev Arkady