1. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING # 2 ISRAD GROUND VALIDATION INDIAN SCENARIO G.VISWANATHAN - ISRO presented by PROF. V. CHANDRA

2. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD PRESENTATION SEQUENCE: Genesis Ongoing Efforts Instrumentation Sample Data from Opportunities Plans for future Relevance to GPM

3. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD Genesis GV efforts @ ISRO started with TRMM through then NASDA, with GV as PI from ISRO & T.Kozu from CRL SHAR for NE Monsoon & Thumba for both SW & NE Monsoon coverage Converted C band tracking Radars with Weather channel MST radar (VHF Profiler along with Disdrometer (VV) & Optical Rain gauge @ Gadanki) Resulted in major collaboration with CRL Japan

4. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD Ongoing efforts: GV work continued more as an inter comparison of data from Doppler Weather Radar (Megha -2700) with TRMM as per opportunities Helped as an indirect validation of DWR Products (Z) once TRMM is well established Collaborative work in progress between ISRAD & Academic Institutions in India Gearing up for GV for Megha - Tropiques & GPM

5. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD INSTRUMENTATION SYSTEMS Radar Systems : S Band Doppler Weather Radar – Megha 2700 Converted C Band Tracking Radar with weather channel Other Instruments : Disdrometer Fast Response RainGauges (Siphon type ) Surface Observatories with TB Rain Gauges

6. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD MEGHA – 2700 Doppler Weather Radar

7. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD ReflectivityVelocitySp Width 1. Range (Km)500250 2. Resolution ( m)300 2. Accuracy @23dBZ2 dB1 m/s @ 2 rpm 3.Unambiguous maximum velocity+/-30 m/s for 125 Km Ambiguity Resolution techniques to extend velocity to +/- 60 m/s for 125 Km or+/- 30 m/s for 250 Km. Design goal +/- 60m/s for 250 km DWR System Specifications

8. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD Klystron based coherent transmitter Low phase noise signal generation Programmable waveforms High dynamic range Log / Lin Receiver 14 bitADCs PC-PCI bus DSP boards PC based radar controller Data Products on Graphic Workstations GIS based Product overlay Calibration using built in source, & Sun Low sidelobe level Pencil beam antenna Programmable Antenna scan functions Sandwich Radome to withstand gale speeds of 250 Km/hr Polarimetry to be included shortly DWR System Features

9. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD MEGHA -2700 CONTROL CONSOLE & WORK STATIONS

10. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD THUNDERSTORM -Z

11. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD THUNDERSTORM -V

12. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD CAPPI@1Km Rain Rate PRECIP DATA PRODUCTS GAUGE DATA

13. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD OBSERVATION OF CYCLONES OVER BAY OF BENGAL CYCLONES ARE CONTINUOUSLY MONITORED USING DWR OPERATED WITH DIFFERENT SCAN STRATEGIES UNDER TIME TAGGED SCHEDULER MODE RADAR WAVE FORM FOR EACH STRATEGY IS SO CHOSEN TO PROVIDE LONG RANGE OBSERVATIONS DUAL PRF TECHNIQUE USED TO MINIMISE RANGE - DOPPLER AMBIGUITIES AT LONG RANGES

14. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD Z V BAY OF BENGAL CYCLONE OF DECEMBER 15, 2003 V DWR OBSERVATIONS

15. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD GV FOR SPACE BORNE PRECIPITATION ESTIMATION INTERCOMPARISON WITH TRMM DWR WAS OPERATED FOR INTERCOMPARISON WITH TRMM ON A CAMPAIGN MODE OBSERVATIONS SIMULATANEOUS MEASUREMENTS WITH FAST RESPONSE RAINGAUGE & DISDROMETER CARRIED OUT SAMPLE DATA PROVIDES A TYPICAL INTERCOMPARISON

16. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD PPI Plot (06 November 2003) DWR (SHAR) (307 Km) 0.5° elevation Figure 1: PPI Plot of DWR Reflectivity over SHAR on 6 th November 2003 (07:03:38 UTC)

17. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD SHAR dBZ PR Scan (06 November 2003) Orbit No. 34082

18. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD FOV = 1 to 19 (a) (b) PR dBZ at 5.5 Km height DWR CAPPI Magnified View of near simultaneous reflectivity observations of (a) DWR and (b) PR (TRMM) on 06 November 2003

19. INTERCOMPARISON WITH TRMM-PR (a) (b) (a) Vertical cross section of DWR (SHAR) (b) PR for the 7th Nov 2003 event. DWR azimuth 136° corresponds to FOV 34 of PR orbit no. 34082. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD DIFFERENCES IN GROUND RANGE ARE DUE EARTH CURVATURE RECONNING

20. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD D DISDROMETER MEASUREMENTS @ SHAR ANALYSIS COURTESY : Dr.Sanjay Sharma, Kohima Science College, Nagaland University.

21. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD PLANS FOR IMMEDIATE FUTURE: POLARIMETRIC UPGRADE FOR DWR MESO NETWORK OF AWS WITH RAINGAUGES INTGRATED OBSERVATION & MODEL ASSIMILATION FOR NOWCASTING WEATHER FOR LAUNCH SUPPORT CO LOCATED WIND PROFILER FOR CONVECTION STUDY Ka BAND PATH ATTENUATION MEASUREMENTS WITH BEACON GV FOR MEGHATROPIQUES POTENTIAL INTERNATIONAL COLLABORATION FOR GPM

22. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD

23. ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING ISRAD