Megha-Tropiques Mission Status N. Viltard and the MT science team
The Megha-Tropiques mission SCARAB BROADBAND VIRS MADRAS PMR IMAGER SAPHIR 183 GHz WV Sounder + GPS-ROSA Courtesy CNES
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
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
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
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
Images MADRAS July 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...
Tbs comparisons w other sensors
Data Production & Distribution MT EUMETSAT RT L1 mirror RS OPE CENTERS RS RS Reception L0 Indian L2 and above Production L1A L1A2 L1A3 L1B L1A L1A2 L1A3 mirror French L2 and above International science team, then WORLD
French Rain L2 (and above) Products SSMI SSMIS TMI MADRAS AMSR-E Viltard L2: BRAIN Instantaneous Rain Profiles and Surface Roca L4: TOOCAN Life-Cycle GEO Roca L4: TAPEER 1 x1day SfcRain product With error bars AMSR-II Viltard/Gosset Algorithms validation Ice microphysics MT-I: Niamey 2010 MT-II: Gan 2011 Poster A. Martini (S2) Gosset Products validation Rain (and ice) Ouaga 2012 CHUVA...
Validation over Land P.E. Kirstetter/S. Kacimi 10 Years of TMI & dense raingauges networks 2 African sites Evaluation BRAINTMI/GV Global evaluation against PR too Rain-No Rain mask improved Benin Niger BRAIN-TMI robust GV BRAIN-TMI Robust GV BRAIN-TMI 5.59 4.92 6.68 7.3 MRE / GV (%) - -12 % - +9 % Correlation / GV - 0.24-0.41 Mean (mm.h-1)
Evaluation inter-instrument bias C. dufour Rain intensity histogram comparison ~150 overpasses TMI OVER OCEAN (one month): -TMI: 2.02 mm.hr-1 -SSMI: 1.76 mm.hr-1 SSMI TB Consolildated=> impact on L4
L4 TOOCAN : Life Cycle Summer 2009 Cold cloud fraction Tracking algorithm Results From half hourly images Fiolleau and Roca, 2011 Composite results Talk by T. Fiolleau => experimental product, release TBC
L4 TAPEER : 1 x1 Day Sfc Rain Tropical Amount of Precipitation with ERRors (TAPEER) BRAIN 1 /1day accumulated rainfall + Error Estimation of the error For the BRAIN Instantaneous retrieval West Africa (Sahel) (Kirstetter et al., 2011) Brazil, India, West Africa With the upcoming Validation plan See Posters by: P. Chambon (S1) M. Alcoba (S2) Chambon et al., 2011 => operational product, when MADRAS data are released by agencies
Summary Note: 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 team Release of First 3 months of MADRAS L1A2 to international science team Early 2013? Stream L1A2 MADRAS to international science team Release of L2 (BRAIN) & L4 (TAPEER) to international science team December 2012 French-Indian conference to prepare General release of L1 2013, TBC General 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