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...
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
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
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
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
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
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
N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Images MADRAS July 2012
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...
N. Viltard et al. Megha-Tropiques Mission Status, Sao José Dos Campos, 15-19 October 2012
Tbs comparisons w other sensors
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
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
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
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
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
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)
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