ISRO RADAR DEVELOPMENT UNIT, BANGALORE.

1
NRSA LECTURE
GPM GV MEETING 2
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GROUND VALIDATION INDIAN SCENARIO G.VISWANATHAN
- ISRO presented by PROF. V. CHANDRA
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
PRESENTATION SEQUENCE Genesis Ongoing
Efforts Instrumentation Sample Data from
Opportunities Plans for future Relevance to GPM
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL

• Genesis
• GV efforts _at_ 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 _at_ Gadanki)
• Resulted in major collaboration with CRL Japan

ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
6
NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
MEGHA 2700 Doppler Weather Radar
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DWR System Specifications
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DWR System Features
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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
MEGHA -2700 CONTROL CONSOLE WORK STATIONS
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THUNDERSTORM -Z
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
11
NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THUNDERSTORM -V
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
12
NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GAUGE DATA
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
13
NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL

• 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

ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
14
NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DWR OBSERVATIONS
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
15
NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
Magnified View of near simultaneous reflectivity
observations of (a) DWR and (b) PR (TRMM) on 06
November 2003
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DIFFERENCES IN GROUND RANGE ARE DUE EARTH
CURVATURE RECONNING
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
D
DISDROMETER MEASUREMENTS _at_ SHAR
ANALYSIS COURTESY Dr.Sanjay Sharma, Kohima
Science College, Nagaland University.
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THANK YOU
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GPM GV MEETING
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.