Megha-Tropiques Mission Status - ISAC - CNRipwg/meetings/saojose-2012/pres/Viltard.pdfN. Viltard et...
Transcript of Megha-Tropiques Mission Status - ISAC - CNRipwg/meetings/saojose-2012/pres/Viltard.pdfN. Viltard et...
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Megha-Tropiques Mission Status
N. Viltard and the MT science team
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Courtesy CNES
SCARAB BROADBAND VIRS MADRAS PMR IMAGER
+ GPS-ROSA
SAPHIR 183 GHz WV Sounder
The Megha-Tropiques mission
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Mission status update
Launched on October 12th 2011 (T0)
From India's Shriharikota launch pad
Reset phase from T0 to T0+3 months
On January 5th 2012: anomaly is detected on MADRAS L0 data stream (likely a multiplexing problem)
Reset activities are still going on for MADRAS
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Checks activities on MADRAS
Check of thermal noise Check of hot and cold load stability Check of gain stability
Evaluation of TBs stats Evaluation of systematic bias
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Checks activities on MADRAS
Check of thermal noise Check of hot and cold load stability Check of gain stability
Evaluation of TBs stats Evaluation of systematic bias
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Checks activities on MADRAS
Check of thermal noise Check of hot and cold load stability Check of gain stability
Evaluation of TBs stats Evaluation of systematic bias
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Images MADRAS July 2012
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Images MADRAS juillet 2012
The instrument is still functioning “nominally” but the data transmission problem persists...The transmitted stream quality is extremely variable.There are a couple of patches being tested right now that seem to be able to take care of most degraded situation but not all of them...
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Tbs comparisons w other sensors
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Data Production & Distribution
ReceptionL0
RS RS
RS
ProductionL1A
L1A2L1A3L1B
International science team, then WORLD
Indian L2and above
L1AL1A2L1A3mirrormirror
French L2 and above
EUMETSAT RT L1 mirror
MT
OPE CENTERS
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
French Rain L2 (and above) Products
L2: BRAINInstantaneous RainProfiles and Surface
SSMI SSMIS TMI MADRAS AMSR-E AMSR-II
L4: TOOCANLife-Cycle
L4: TAPEER1°x1Day
SfcRain productWith error bars
Algorithms validationIce microphysics
MT-I: Niamey 2010MT-II: Gan 2011
Poster A. Martini (S2)
Products validationRain (and ice)Ouaga 2012
CHUVA...GEO
Viltard/Gosset
Gosset
Viltard
RocaRoca
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Validation over LandP.E. Kirstetter/S. Kacimi
Benin Niger
BRAIN-TMIrobust GV
BRAIN-TMI Robust GV BRAIN-TMI
Mean (mm.h-1) 5.59 4.92 6.68 7.3
MRE / GV (%) - -12 % - +9 %
Correlation / GV - 0.24 - 0.41
10 Years of TMI & dense raingauges networks2 African sitesEvaluation BRAIN
TMI/GV
Global evaluation against PR tooRain-No Rain mask improved
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Evaluation inter-instrument biasC. dufour
OVER OCEAN (one month):-TMI: 2.02 mm.hr-1
-SSMI: 1.76 mm.hr-1
TMI SSMI
Rain intensity histogram comparison ~150 overpasses
TB Consolildated=> impact on L4
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Summer 2009
Fiolleau and Roca, 2011
Tracking algorithm ResultsFrom half hourly images
Compositeresults
Cold cloud fraction
L4 TOOCAN : Life Cycle
=> experimental product, release TBC
Talk by T. Fiolleau
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
L4 TAPEER : 1°x1 Day Sfc Rain
Tropical Amount of Precipitation with ERRors (TAPEER) – BRAIN1°/1day accumulated rainfall + Error
Chambon et al., 2011
Estimation of the errorFor the BRAIN Instantaneous retrieval
West Africa (Sahel)(Kirstetter et al., 2011)
Brazil, India, West AfricaWith the upcoming Validation plan
=> operational product, when MADRAS data are released by agencies
See Posters by:P. Chambon (S1)M. Alcoba (S2)
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N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
SummaryNote: Several month (sic) of delay wrt the initial plan due to : -ground segment development (CNES-ISRO) -problems on MADRAS since January 2012
Since Launch:Agencies (CNES & ISRO) working on the instruments checks
Summer/Fall 2012:Release of SAPHIR L1A2 stream to international science teamRelease of First 3 months of MADRAS L1A2 to international science team
Early 2013 ?Stream L1A2 MADRAS to international science teamRelease of L2 (BRAIN) & L4 (TAPEER) to international science team
December 2012French-Indian conference to prepare General release of L1
2013, TBCGeneral release of L1A2 and above
Summer 2013 First international scientific conference
See Marielle Gosset presentation for MT-GV activities.
WEB site http://megha-tropiques.ipsl.polytechnique.fr