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