ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE INDO FRENCH WORKSHOP ON MEGHA TROPIQUES ISRAD GROUND VALIDATION FOR MEGHATROPIQUES USING DOPLER WEATHER RADAR MEGHA-2700 PRESENTATION BY G.VISWANATHAN – ISRAD @SAC - BOPAL 20 th OCT 2005
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ISRO RADAR DEVELOPMENT UNIT, BANGALORE. PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE INDO FRENCH WORKSHOP ON MEGHA TROPIQUES ISRAD.
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ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREINDO FRENCH WORKSHOP ON MEGHA TROPIQUES
ISRAD
GROUND VALIDATION FOR MEGHATROPIQUESUSING DOPLER WEATHER RADAR MEGHA-2700PRESENTATION BY G.VISWANATHAN – ISRAD
@SAC - BOPAL20 th OCT 2005
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
PRESENTATION SEQUENCE:
Genesis & Ongoing Efforts on GVMEGHA -2700, DWR @ SDSC – SHARSample Data from MEGHA - 2700Plans for GV For Megha TropiquesCAL – VAL ISSUES
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
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•Resulted in major collaboration with CRL Japan
•* IMD collaborated with NASA @ Karaikkal•MST radar (VHF Profiler along with Disdrometer (VV)
& Optical Rain gauge @ Gadanki)
GV FOR MT USING DWR MEGHA - 2700
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. 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 was well establishedCollaborative work in progress between ISRAD & Academic Institutions in India Gearing up for GV for Megha - Tropiques & GPM
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
INSTRUMENTATION SYSTEMS GV Radar Systems :
S Band Doppler Weather Radar – Megha 2700Converted C Band Tracking Radar with weather channel
Other Instruments :DisdrometerFast 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.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
MEGHA – 2700 Doppler Weather Radar System@
SDSC - SHAR
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
Reflectivity Velocity Sp Width
1. Range (Km) 500 250 2502. Resolution ( m) 300 300 3002. Accuracy @23 dBZ 2 dB 1 m/s 1 m/s
@ 2 rpm3.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 SpecificationsDWR System Specifications
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
Klystron based coherent transmitterLow phase noise signal generationProgrammable waveformsHigh dynamic range Log / Lin Receiver14 bit ADCs PC-PCI bus DSP boardsPC based radar controllerData Products on Graphic WorkstationsGIS based Product overlayCalibration using built in source, Sun & Metal SphereProgrammable Antenna scan strategiesLow side lobe level Pencil beam antennaSandwich Radome to withstand gale speeds of 250 Km/hrPolarimetry to be included shortly
DWR System Features
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
GV FOR MT USING DWR MEGHA - 2700
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
GV FOR MT USING DWR MEGHA - 2700
RADOME & Antenna:
Self supporting structure 12.8m dia , with 9 m Antenna,Dual Pol FeedCurved A-type sandwich panelsInsertion loss - 0.2dB(one way)Withstands steady winds of 250 kmph gusting upto 300 kmph
Radome Developed by NAL-BangaloreFeed by LRDE & Antenna by ISRO
Antenna inside Radome @ LRDE Test Range
Horizontal Polarization Freq =2.8 GHz
-50
-40
-30
-20
-10
0
-20 -16 -12 -8 -4 0 4 8 12 16 20
Azimuth (deg)
Le
vel(
dB
)
Antenna Pattern matches well forV Polarization also
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
GV FOR MT USING DWR MEGHA - 2700
Rx CSG Servo 1 MW -TRANSMITTER
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
MEGHA -2700 CONTROL CONSOLE & WORK STATIONS
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
THUNDERSTORM -Z
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
THUNDERSTORM -V
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
GV FOR MT USING DWR MEGHA - 2700
Z
RHI
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
ISRAD
CAPPI@1Km Rain Rate
PRECIP DATA PRODUCTS
Rainfall recorded w ith IISc rain gauge at SHAR on 06-12-2002
Z- R Relationships Selectable Based on Type of Rain Regimen with lots of choice. Rain Acc for 1hr std product
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
GV FOR MT USING DWR MEGHA - 2700
Echo Top in KM
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE
ISRAD
GV FOR MT USING DWR MEGHA - 2700
VVP - 2FEATHER DIAGRAM
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
13:05:19 UT
THUNDER STORM OF 17 OCTOBER 2002
CONVECTION CAMPAIGN
ISRAD ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
13:29:07 UT
CONVECTION CAMPAIGN : THUNDERSTORM OF OCT17,2002
ISRAD ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
“MEGHA – 2700”
13:59:33 UT
THUNDER STORM OF 17 OCTOBER 2002
ISRAD ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
14:29:13 UT
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
15:28:50 UT
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
15:55:54 UT
THUNDER STORM OF 17 OCTOBER 2002
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
16:20:31 UT
THUNDER STORM OF 17 OCTOBER 2002
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
16:44:50 UT
THUNDER STORM OF 17 OCTOBER 2002
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
17:06:48 UT
THUNDER STORM OF 17 OCTOBER 2002
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
18:03:25 UT
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTURE “MEGHA – 2700”
18:45:16 UT
THUNDER STORM OF 17 OCTOBER 2002
ISRO RADAR DEVELOPMENT UNIT, BANGALORE. ISRAD
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700
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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGV FOR MT USING DWR MEGHA - 2700