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oct 2016:CNES and ISRO signed the four-year extension of the Megha-Tropiques mission
Thursday 6 October, CNES President Jean-Yves Le Gall and AS Kiran Kumar, Chairman of the Indian Space Research Organization (ISRO), signed at CNES’s Head Office in Paris a four-year extension of the Megha-Tropiques mission launched five years ago. See the press release
Last Updated ( Friday, 21 October 2016 )
 
Feb 2016: Collaboration between the MT french science team and the Indian Institue of Science
Clement Guilloteau (student from the Megha-Tropiques french scientific team) is visiting the Indian Institue of Science in Bangalore as part of his doctoral project to collaborate with Dr. V. Venugopal from December 2015 to February 2016. The aim of this visit is to benefit from Dr. Venugopal's expert knowledge in multi-scale representation in view of the downscaling of the Megha-Tropiques rainfall product. The collaboration will also be an opportunity to test the methods developed for West Africa under the Indian climate." 
 
Feb 2016: Publication of the Megha-Tropiques Technical Memorandum n°7
This technical report presents recent effort to compute variograms using a spectral method. Variograms are used to compute the sampliing uncertainty of the 1°/1 day rainfall amount of the TAPEER product. The document is available here: Megha-Tropiques Technical Memorandum n°7.
 
September 2015: Release of relative humidity profile products

Layer-averaged Relative Humidity profiles are now available on the ICARE data center  since the launch of the Megha-Tropiques satellite. This product decomposes the troposphere into 6 layers: 100-200hPa, 250-350hPa, 400-600hPa, 650-700hPa, 750-800hPa and 850-950hPa. The retrieval scheme named ARPIA for "Atmospheric Relative humidity profile Including the Analysis of confidence intervals" encompasses the estimation of the mean RH as well as its standard deviation interpreted as the 1-sigma confidence interval. ARPIA considered cloud-free and cloudy conditions, oceanic and continental scenes. The only limit is for icy layers on top of convective clouds and for precipitating conditions, which are withdrawn using the Hong et al (2005) threshold method adapted for SAPHIR channels.

The details of the method is described in a recently submitted paper (Brogniez et al., hopefully soon available) 

 

Last Updated ( Tuesday, 02 February 2016 )
 
18 May 2015: publication of the article on the Megha-Tropiques review
Publication of the article in Frontiers in Earth Science, section Atmospheric Science: The Megha-Tropiques mission: a review after three years in orbit, by Rémy Roca, Hélène Brogniez, Philippe Chambon, Olivier Chomette, Sophie Cloché, Marielle Eliane Gosset, Jean-francois Mahfouf, Patrick Raberanto, Nicolas Viltard. To view the online publication, please click here .

Last Updated ( Tuesday, 19 May 2015 )
 
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