ISRO RADAR DEVELOPMENT UNIT, BANGALORE'

1
NRSA LECTURE
INDO FRENCH WORKSHOP ON MEGHA TROPIQUES
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GROUND VALIDATION FOR MEGHATROPIQUES USING DOPLER
WEATHER RADAR MEGHA-2700 PRESENTATION BY
G.VISWANATHAN ISRAD _at_SAC - BOPAL 20 th OCT 2005
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
2
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION SEQUENCE Genesis Ongoing
Efforts on GV MEGHA -2700, DWR _at_ SDSC
SHAR Sample Data from MEGHA - 2700 Plans for GV
For Megha Tropiques CAL VAL ISSUES
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
3
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700

• 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
• Resulted in major collaboration with CRL Japan
• IMD collaborated with NASA _at_ Karaikkal
• MST radar (VHF Profiler along with Disdrometer
  (VV) Optical Rain gauge _at_ Gadanki)

ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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GV FOR MT USING DWR MEGHA - 2700
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 was 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.
5
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
INSTRUMENTATION SYSTEMS GV 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 AWS Mesonet (Golden Triangle SHAR,
Gadanki, Chennai) LIDAR NETWORK ( for
Radiation/Aerosols)?
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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GV FOR MT USING DWR MEGHA - 2700
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
MEGHA 2700 Doppler Weather Radar System _at_ SDSC
- SHAR
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
7
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DWR System Specifications
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
8
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
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 bit ADCs PC-PCI bus DSP boards PC
based radar controller Data Products on Graphic
Workstations GIS based Product overlay Calibration
using built in source, Sun Metal
Sphere Programmable Antenna scan strategies Low
side lobe level Pencil beam antenna Sandwich
Radome to withstand gale speeds of 250
Km/hr Polarimetry to be included shortly
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
9
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
10
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
Antenna Pattern matches well for V Polarization
also
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
11
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
12
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
MEGHA -2700 CONTROL CONSOLE WORK STATIONS
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THUNDERSTORM -Z
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
14
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THUNDERSTORM -V
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
15
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
RHI
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
16
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
Z- R Relationships Selectable Based on Type of
Rain Regimen with lots of choice. Rain Acc for
1hr std product
GAUGE DATA
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
17
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
18
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
VVP - 2 FEATHER DIAGRAM
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
19
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THUNDER STORM OF 17 OCTOBER 2002
CONVECTION CAMPAIGN
130519 UT
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
20
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
CONVECTION CAMPAIGN THUNDERSTORM OF OCT17,2002
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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MEGHA 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
22
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
23
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
24
NRSA LECTURE
MEGHA 2700
THUNDER STORM OF 17 OCTOBER 2002
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
155554 UT
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
25
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
26
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
27
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
THUNDER STORM OF 17 OCTOBER 2002
170648 UT
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
29
NRSA LECTURE
MEGHA 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
30
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
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.
31
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DWR OBSERVATIONS with Dual PRF UAR 250km UAV
/- 30m/s
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
32
NRSA LECTURE
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
33
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
GV FOR SPACE BORNE PRECIPITATION ESTIMATION
EXPERIENCE 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.
34
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
35
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
36
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
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.
37
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
DIFFERENCES IN GROUND RANGE ARE DUE EARTH
CURVATURE RECONNING
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
38
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
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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CAL VAL ISSUES FOR GV FOR MT

• VIEWING GEOMETRIES
• RESOLUTION VOLUMES DUE
• ANTENNA 3D PATTERNS
• TIME SYNCHRONIZATION
• SPATIAL ALIGNMENT ATT
• PERTURBATIONS OF S/C
• OPERATING FREQUENCIES
• RADIOMETRIC CALIBRATION
• BOTH FOR GR PAYLOAD

Cartoon Courtesy Prof.Chandrasekar ,CSU
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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PLANS FOR IMMEDIATE FUTURE POLARIMETRIC
UPGRADE FOR DWR MESO NETWORK OF AWS WITH
RAINGAUGES AROUND SHAR INTEGRATED OBSERVATION
MODEL ASSIMILATION FOR NOWCASTING WEATHER FOR
LAUNCH SUPPORT CO LOCATED WIND PROFILER FOR
CONVECTION STUDY GV FOR MEGHATROPIQUES SHIPBO
RNE C BAND DWR ON BOARD ORV-SAGAR KANYA
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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WIND PROFILER FOR SDSC - SHAR
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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INSTALL NEW DWR MEGHA-5400 ON BOARD ORV SAGAR
KANYA
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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VARSHA
44
NRSA LECTURE
GV FOR MT USING DWR MEGHA - 2700
PRESENTATION TO CHAIRMAN - ISRO MEMBERS - ISRO
COUNCIL
Wisdom from Ancient India
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
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THANK YOU
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.