Megha-Tropiques MissionMegha-Tropiques Mission Syndication
http://meghatropiques.ipsl.polytechnique.fr/images/M_images/joomla_rss.pngtext/html2016-10-20T11:35:22+01:00oct 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 (https://presse.cnes.fr/en/france-india-space-cooperation-four-more-years-emblematic-megha-tropiques-climate-space-mission)
text/html2016-02-02T08:39:01+01:00Feb 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.
text/html2016-02-02T08:34:28+01:00Feb 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 (index.php?option=com_docman task=doc_download gid=390).
text/html2015-09-11T09:49:47+01:00September 2015: Release of relative humidity profile products
Layer-averaged Relative Humidity profiles (index.php?option=com_content task=view id=140 Itemid=1) are now available on the ICARE data center (http://www.icare.univ-lille1.fr/drupal/mt) 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
The details of the method is described in a recently submitted paper
(Brogniez et al., hopefully soon available)
text/html2015-05-19T05:47:02+01:0018 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 (http://journal.frontiersin.org/article/10.3389/feart.2015.00017/abstract) .
text/html2015-03-20T10:26:58+01:00Save the date: 29-30 june 2015, Joint workshop on uncertainties at 183 GHz, Paris
are pleased to announce the Joint workshop on uncertainties at
183GHz , which is aimed at identifying possible
explanations for biases observed between measured and simulated 183 GHz data.
workshop, sponsored by the Megha-Tropiques mission, will be held at University Pierre et Marie Curie
(Paris, France) from 29-30
you are willing to attend, please register via the workshop
text/html2015-03-16T09:54:04+01:00March 2015: Release of the experimental version of the TAPEER rainfall dataset for JJAS 2012-2014
We are happy to inform you about the release of an experimental version
of the TAPEER rainfall data.
The product consists in 1° x 1 ° x 1 day accumulated rainfall estimate
(in mm) and the associated uncertainty estimation.
The release concerns the June, July, August and September 2012, 2013 and
2014 over the tropical belt (30s-30n). The format is netCDF.
The TAPEER approach merges IR geostationary data at full resolution with
the GPM constellation microwave imagers, including SAPHIR on board
More information on the data,
The finalized dataset, covering all the period since the launch of
Megha-Tropiques, will be released in the coming months via the ICARE
center (http://www.icare.univ-lille1.fr/drupal/) in France.
We will keep you posted on this formal release. By then any feedback
will be appreciated as it will help to improve the products before this
Please send your comments to me : firstname.lastname@example.org (mailto:email@example.com)
To access the data:
text/html2015-03-09T08:36:48+01:00Save the date: 17-19 november 2015, Conference on Water and Energy cycles in the tropics, Paris
The aim of the conference is to provide a forum to
review and discuss the latest research on the topic of the water
and energy cycles with emphasis on tropical regions. The
tropical energy cycles are central to the climate, its
variability and its future evolution as reflected in the WCRP
Grand Challenges being led by both the GEWEX program and the
WGCM. The dynamical nature of the tropical water cycle and the
control on the energy balance on both the tropical atmospheric
dynamics and water cycle is one of the main incentives of the
conference. Sessions covering the various aspects of this
complex coupled problem are anticipated, including topics on the
large scale Hadley/Walker circulation, the ITCZ, ENSO, monsoons,
tropical convection, extreme rain
events and droughts, and water and energy budget studies associated with these
phenomena. The conference will bring together theoretical,
observing (in-situ and from satellites) and modeling
perspectives as well as address the evolution of the tropical phenomena under climate change.
The conference is to be
organized by CNES, CNRS, with the support of IPSL, with the sponsorship of GEWEX and will
be held from 17 to 19 November 2015 in the Institut
d'Océanographie, in the heart of Paris, France.
More information and updates at: http://www.water-energy-tropics2015.com/ (http://www.water-energy-tropics2015.com/)
text/html2014-10-21T08:38:45+01:0013-17 oct 2014: The Climate Symposium
Dr Roca was invited to give a talk on Tropical Rain Bearing Systems and the changing water cycle at the Climate Symposium (http://www.theclimatesymposium2014.com/index_.php/climatesymposium/index) that took place
last week in Darmstadt, Germany. Dr Roca presentation's was based on the recently published paper in Journal of Climate dealing with the importance of the Mesoscale Convective Systems in the tropical rainfall budget (Roca et al., 2014 (http://www.legos.obs-mip.fr/roca/Rocaetal2014.pdf) ). At the symposium, an updated investigation was shown where for the first time the rainfall data from the Megha-Tropiques team were used. The TAPEER v1.0 data indeed included all the GPM constellation member active during the period of study (summer 2012) including the MADRAS data. These data available available in the coming weeks through the ICARE data center (http://www.icare.univ-lille1.fr/drupal/) , stay tuned !
text/html2014-10-16T13:00:01+01:00Presentations of the Joint CERES-GERB and SCARAB Earth Radiation Budget Workshop
The MT team hosted a joint workshop on Earth Radiation Budget (ERB), with the CERES, GERB and ScaRaB science teams, on 7-10 october 2014 in Toulouse, France. The purpose of this workshop was to bring the CERES, GERB and ScaRaB communities together in order to maximize the exchange of information and ideas on how to make optimal synergistic use of the data from all 3 missions.
You can find the presentations of the workshop on the CERES web site (http://ceres.larc.nasa.gov/science-team-meetings2.php?date=2014-10) .
text/html2014-07-31T07:45:53+01:007-10 oct 2014: Joint CERES-GERB and SCARAB Earth Radiation Budget workshop
The CERES, GERB and ScaRaB science teams are pleased to announce a joint workshop on Earth Radiation Budget (ERB) Observations to be hosted by the ScaRaB team on 7-10 October 2014 in Toulouse, France (more details here (http://erb2014.sciencesconf.org/)). All three of these missions provide complementary information on the Earth’s radiation budget. CERES provides cloud-aerosol-radiation budget data globally each day but at limited times of the day due to its sun-synchronous orbit. GERB provides very high temporal coverage of the ERB from its geostationary orbit over a limited portion of the Earth, and ScaRaB on Megha-Tropiques provides ERB data from a low-inclination orbit. Such a remarkable and historic set of concurrent observations will provide unique opportunities to improve our understanding of the ERB from both the observational and modeling perspectives.
The purpose of this workshop is to bring the CERES, GERB, and ScaRaB communities together in order to maximize the exchange of information and ideas on this critically important area of Earth science.
The workshop will consist of 1.5 days of presentations from each team on instrument/algorithm/validation status and two days of invited and contributed science presentations, as well as discussions on how to make optimal synergistic use of the data from all 3 missions
text/html2014-05-20T12:41:45+01:00May 2014: Publication of the book "HANDBOOK OF SATELLITE ORBITS - from Kepler to GPS"
In this book, Megha-Tropiques orbitography is very well explained and represented.
HANDBOOK OF SATELLITE ORBITS - from Kepler to GPS
2014 950 pages, 369 illus., 292 illus. in color.
Foreword by Charles Elachi, JPL Director.
ISBN 978-3-319-03415-7. Hardcover.
text/html2014-03-04T13:40:36+01:003 mars 2014: mise en ligne des présentations "Journée de validation Megha-Tropiques" du 14/02/2014
Les présentations sont disponibles ici (index.php?option=com_content task=view id=235 Itemid=1) .
text/html2014-02-28T16:02:26+01:0027 February 2014: Successful launch of GPM-Core
GPM Core satellite (http://www.nasa.gov/mission_pages/GPM/main/index.html#.UxDCSWKwaZc) (NASA/JAXA cooperation) was successfully launched from Tanegashima Space Center in southern Japan at 1:37 p.m. EST Thursday, Feb. 27. The GPM Core will be on a 65° inclination orbit, sampling the tropics and the mid-latitudes with its passive microwave radiometer, GMI, and its two radars (Ka and Ku band), to detect rain and snow events. The GPM Core will be used as a reference to intercalibrate and compare all the data from the different satellites of the GPM constellation among which Megha-Tropiques is a key player between 30°N and 30°S. Satellite operations and instruments checking will take place in the next few weeks. Data availability is foreseen 6 month from now.
text/html2014-01-28T13:31:34+01:0027 février 2014 : lancement annoncé de GPM-core
Un article (http://www.lemonde.fr/planete/article/2014/01/28/un-satellite-va-etre-lance-pour-etudier-les-precipitations-mondiales_4355423_3244.html) du journal Le Monde à propos du futur lancement de GPM-Core annoncé par la Nasa pour le 27 février 2014. Plus d'infos ainsi que le décompte du lancement sur le site de la NASA ici (http://www.nasa.gov/mission_pages/GPM/main/#.Uue-gdJKHWQ)
text/html2014-01-23T13:18:02+01:0014 février 2014: Journée de présentation des résultats de la validation des produits Megha-Tropiques
L'évènement aura lieu le Vendredi 14 février 2014 à partir de 10h dans l’amphithéâtre ASTIER du bâtiment Esclangon à Jussieu. Le programme des présentations de la journée est disponible ici (dmdocuments/planning_14février2014_secondannouncement.pdf) .
text/html2014-01-16T07:14:55+01:0028 december 2013 to 4 january 2014 : Typhoon Bejisa seen by SAPHIR on Megha-Tropiques
Typhoon Bejisa took place in the western part of the Indian Ocean from
December 28th, 2013 to January 4th, 2014. The storm center passed
approximately 100 km of La Réunion Island in the afternon of January
2nd. The SAPHIR instrument was able to capture 21 brightness temperature
images showing the evolution of the storm structure from its early
stage as a tropical depression, to the full cyclone, and then to the
dissipating stage. The image shown here is the 183+-11 GHz image on
january 1st at 2045 UTC, showing the storm at one of its most intense
moment while moving toward La Réunion. The eye and eyewall structure are
clearly visible and also the convective rain bands extending to the
south-east and affecting la Reunion and Mauricius. A pdf document with
all the images and also with the retrieved Upper Tropospheric Humidity
can be found here (dmdocuments/Document_Bejisa.pdf). Full resolution images are available here (data/qlooks/Bejisa/) .
text/html2013-12-20T11:38:54+01:0016/12/2013: PhD thesis Defense of Ramses Sivira
The PhD thesis of Ramses Sivira (advisors: Dr Cécile Mallet and Dr Hélène Brogniez, UVSQ/LATMOS) has the following title: Development of a retrieval method of relative humidity profiles and
their conditional distribution of errors for Megha-Tropiques
text/html2013-12-02T13:04:23+01:00Mise en ligne des présentations de la journée cycle de vie des MCS du 23/09/2013
Le compte rendu ainsi que les présentations de la journée 'Cycle de vie des MCS' qui s'est tenue le 23 septembre 2013 au CNRM à Toulouse sont désormais disponibles ici (index.php?option=com_content task=view id=229 Itemid=1).
text/html2013-10-25T13:29:34+01:0025 October 2013: Release of the french scientific Level 2 products for SCARAB and SAPHIR
We are delighted to announce the release of the french scientific Level 2
products for the SCARAB and the SAPHIR instruments.