News and Events

Latest related research news

Read the latest on research by Megha-Tropiques scientists, announcements of meetings and other events that Megha-Tropiques scientists are participating in on the Megha-Tropiques Science Team web site.


Public release of Megha-Tropiques SAPHIR and ScaRaB
Level-1A and Level-1A2 data – January 2013


ISRO and CNES have announced the public release of Level-1A and Level-1A2 products of Megha-Tropiques SAPHIR and ScaRaB. Version v1.05 of these data are routinely transmitted to ICARE since January 24, 2013 and are available as "orbit-wise" as well as "segment-wise". This new version includes the latest calibration revisions for both sensors and is currently under evaluation.
Although earlier versions (v1.02, v1.03, v1.04) are also available from the beginning of the mission (from October 13, 2011), they are based on interim radiometric and geometric calibrations and should be used with caution and primarily for qualitative use.

Data release announcement
Megha-Tropiques SAPHIR Level-1 data now available
July 2012

Starting July 6, 2012, SAPHIR Level-1 data (MT1SAPSL1A "dump-wise" products) are routinely transmitted to the ICARE Data and Services Center from the Indian mission center ISSDC. The software used to produce the Level-1 data has been validated by CNES and ISRO. In accordance with the agreement signed by CNES and ISRO, access to these early data sets is restricted to the French and Indian mission teams and to scientists selected through the 2009 Megha-Tropiques International announcement of opportunity during a 6-month period. During this period, CNES, ISRO and the science team will continue their calibration and validation effort. So far the products are provisional and the calibration (radiometric and geometric) is only tentative.

CNES processes ScaRab data acquired onboard Megha-Tropiques satellite
December 2011

Image credit: CNES

CNES has processed the ScaRaB 4 channels to generate an example of level 1A geolocated data in the solar and thermal channels. ScaRaB (Scanner for Radiation Budget) is a broadband radiometer to measure shortwave and longwave outgoing fluxes at the top of the atmosphere and is one of the 3 radiometric instruments onboard the Megha-Tropiques satellite. The image shows one orbit of light reflected or emitted by the Earth and the atmosphere, passing over (from left to right) the Arabian Peninsula, the Arabian Sea, India, Malaysia, followed by night time data, then Eastern Africa and back again to the Arabian Peninsula.

Photo credit: CNES

Megha-Tropiques satellite acquires first MADRAS and SAPHIR images on October 25, 2011

The MADRAS and SAPHIR instruments onboard the Megha-Tropiques satellite have captured their first image on October 15, 2011. The CNES has processed the MADRAS 9 channels and SAPHIR 6 channels to generate geolocated brightness temperature on one orbit.

This image is an example taken by the MADRAS instrument (Microwave Analysis and Detection of Rain and Atmospheric Structures). It shows one orbit of brightness temperature passing over Central Africa, Northern Australia, and Central America.

Photo credit: ISRO

Successful launch of the French-Indian Megha-Tropiques satellite
October 12, 2011

On October 12, 2011, the Indian Space Research Organization (ISRO) successfully launched the Megha-Tropiques satellite on a Polar Satellite Launch Vehicle (PSLV) rocket from the Sriharikota launch base. The Megha-Tropiques is a joint project between the ISRO and the French government space agency CNES.

Megha-Tropiques is the first satellite dedicated to advancing our understanding of the water cycle contribution to the climate dynamics in the tropical atmosphere. It is equipped with 4 instruments: MADRAS (CNES and ISRO), to track the distribution and dynamics of rain and clouds; SAPHIR (CNES), to produce humidity profiles; ScaRaB (CNES), which will measure energy fluxes; and ROSA, which will supply humidity and temperature profiles.

The ICARE Data and Services Center is responsible for data processing and distribution of the derived science products to the French research community, while IPSL is responsible for the science product algorithms.