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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
PRESENTATION SEQUENCE:
GenesisOngoing EffortsInstrumentationSample Data from OpportunitiesPlans for futureRelevance to GPM
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
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 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 LECTUREGPM – GV MEETING
ISRAD
INSTRUMENTATION SYSTEMS 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
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
MEGHA – 2700 Doppler Weather Radar
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
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 LECTUREGPM – GV MEETING
ISRAD
Klystron based coherent transmitterLow phase noise signal generationProgrammable waveformsHigh dynamic range Log / Lin Receiver14 bitADCs PC-PCI bus DSP boardsPC based radar controllerData Products on Graphic WorkstationsGIS based Product overlayCalibration using built in source, & SunLow sidelobe level Pencil beam antennaProgrammable Antenna scan functionsSandwich 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 LECTUREGPM – GV MEETING
ISRAD
MEGHA -2700 CONTROL CONSOLE & WORK STATIONS
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
THUNDERSTORM -Z
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
THUNDERSTORM -V
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
CAPPI@1Km Rain Rate
PRECIP DATA PRODUCTS
Rainfall recorded w ith IISc rain gauge at SHAR on 06-12-2002
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
7:00 7:30 8:00 8:30 9:00 9:30 10:00 10:30 11:00 11:30 12:00 12:30 13:00 13:30 14:00 14:30 15:00 15:30 16:00 16:30
time
rain
fall
in m
m
GAUGE DATA
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
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
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 TRMMON A CAMPAIGN MODE OBSERVATIONS
SIMULATANEOUS MEASUREMENTS WITH FAST RESPONSERAINGAUGE & DISDROMETER CARRIED OUT
SAMPLE DATA PROVIDES A TYPICAL INTERCOMPARISON
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 6th November 2003 (07:03:38 UTC)
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
0
5
10
15
20
25
30
35
40
45
50
14 N
Longitude
La
titu
de
SRI LANKA
12 N
78 E 80
E 82
E 84
E
8 N
88 E
90 E 92
E 94
E 96
E 98
E 100
E 10
N
SHAR
dBZ
PR Scan (06 November 2003)Orbit No. 34082
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
80.6 80.8 81 81.2 81.4 81.6 81.8 82 82.2 82.4 82.611.2
11.4
11.6
11.8
12
12.2
12.4
12.6
Longitude
Latit
ude
0
5
10
15
20
25
30
35
40
45
50
Longitude
Lat
itu
de
80.6 80.8 81 81.2 81.4 81.6 81.8 82 82.2 82.4 82.611.2
11.4
11.6
11.8
12
12.2
12.4
12.6
0
5
10
15
20
25
30
35
40
45
50
Longitude
FOV = 1 to 19
(a) (b)
PR dBZ at 5.5 Km heightDWR CAPPI
Magnified View of near simultaneous reflectivity observations of (a) DWR and (b) PR (TRMM) on 06 November 2003
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
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.
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 ASSIMILATIONFOR 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.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD
ISRO RADAR DEVELOPMENT UNIT, BANGALORE.
PRESENTATION TO CHAIRMAN - ISRO & MEMBERS - ISRO COUNCIL NRSA LECTUREGPM – GV MEETING
ISRAD