The ICARE Thematic Center was created in 2003 by CNES, CNRS, the Nord-Pas-De-Calais Regional Council, and the University of Lille, to provide various services to support the research community in fields related to atmospheric research, such as aerosols, clouds, radiation, water cycle, and their interactions. ICARE's initial emphasis is the production and distribution of remote sensing data derived from Earth observation missions from CNES, NASA, and EUMETSAT. One of ICARE's main components is the Data and Services Center, located at the University of Lille, which develops science algorithms and production codes, building on the expertise from various partner Science Computing Facilities, and distributes products to the users community.


1st announcement
3rd International A-Train Symposium
19-21 April 2017, Pasadena, California


For over a decade, the A-Train Constellation has successfully collected a uniquely comprehensive environmental data set. The 3rd International A-Train Symposium will be an opportunity to learn and exchange information about A-Train scientific breakthroughs and to highlight how Earth science has benefited from the long, continuous, multi-sensor data set. The 3rd Symposium follows on previous A-Train Symposia held in Lille, France in 2007 and in New Orleans in 2010.
To see the official first circular, click here.
Additional information regarding the meeting, as well as on-line registration and abstract submission form, will be available at the following web site: https://espo.nasa.gov/a-train_2017. Another notice will be sent when registration and abstract submission are open.

New product announcement:
Release of POLAC wind speed product
derived from POLDER/PARASOL observations– May 2016

POLAC wind speed observed by PARASOL
Image credit: Harmel and Chami (2012)


A wind speed product has been developed in the framework of a joint collaboration between the Laboratoire d’Océanographie de Villefranche (France) and ICARE. This new product is derived from POLDER/PARASOL polarimetric and multidirectional observations over the oceans using an algorithm named POLAC (POLarized Atmospheric Correction) and a method based on the dependence of the Sun glint radiation on wind speed. The wind speed is given at full PARASOL native spatial resolution (about 6 km at nadir) on a pixel basis, and in HDF format for each orbit (POLAC-L2 "Level-2") or daily (e.g. globally, POLAC-D3 "Level-3"). The Level-2 and Level-3 products are public. Click here for the Level-2 or here for the daily Level-3 to access the data from the ICARE archive interface. The current version is v1.00, with data processed from March 2005 to October 2013.
For a summary description of the method, see the POLAC document. Detailed description of the algorithm and validation studies using in-situ and satellite data are available in Harmel and Chami, 2011, 2012 and 2013 (see Publications).
This image shows an example of wind speed values retrieved from the PARASOL image acquired on May 5, 2006 over the north-west part of the Mediterranean Sea (from Fig. 1a, Harmel and Chami (2012)).

CALIPSO mission:
10 years analyzing clouds and aerosols
April 28, 2016


Ten years ago to the day, on 28 April 2006, the French-U.S. CALIPSO satellite was sent aloft from Vandenberg Air Force Base, California, atop a Delta II launcher to take up its place in the A-Train constellation. With CALIPSO celebrating 10 years of science measurements in June 2016, it is time to reflect on a mission that has yielded a wealth of data, offering new insights into the workings of Earth’s climate system.
Read the press release (in English).
Lire le communiqué de presse (en français).

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