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Journée Thématique du Programme National de Télédétection Spatiale
"Observation et modélisation de structures 3D des enveloppes superficielles"
16 mars 2017, CNES, Paris
Le Programme National de Télédétection Spatiale organise le 16 mars 2017 une journée thématique consacrée à "Observation et modélisation de structures 3D des enveloppes superficielles" dans le but de favoriser les échanges entre chercheurs sur cette thématique pluridisciplinaire prometteuse. Cette journée thématique du PNTS se déroulera le 16 mars 2017 à Paris de 9h00 à 17h30. Le programme de la journée et les informations pratiques sont disponibles à l'adresse suivante: http://www-loa.univ-lille1.fr/workshops/workshopPNTS2017/. La participation à cette journée est libre et gratuite, mais l'accès au CNES nécessite une déclaration préalable des participants. Vous êtes donc invité(e) à vous inscrire en remplissant avant le 27 Février 2017 (délai de rigueur) le formulaire en ligne qui est mis à disposition sur le site internet du workshop.
Release of CALIPSO V4-10 Level-1 and Level-2 Lidar products
The CALIPSO mission announces the release of new versions of its standard Level-1 and Level-2 lidar data products. These products are available through the Atmospheric Science Data Center (ASDC) at NASA Langley Research Center and the French AERIS/ICARE Data and Services Center in Lille, France. The new data products consist of the following:
Version 4.10 Lidar Level-1 Products
The product is available beginning with data from June 13, 2006 (following CALIOP first light), and as of this announcement, through December 31, 2008. Remaining data will be available as it is produced.
To see the full announcement, click here.
3rd International A-Train Symposium
18-21 April 2017, Pasadena Convention Center, California
Registration now open
The 705-km Afternoon (A-Train) Satellite Constellation brings together a rich array of instruments to better understand Earth’s changing climate and environment. The 3rd International Symposium on the A-Train Satellite Constellation is an opportunity to learn more about the evolving capabilities of the A-Train system, and to engage other colleagues with similar interests.
To see the second official circular, click here.
Registration and abstract submission are now open. The deadline for abstract submission has been extended to December 16, 2016. There is no registration fee to attend. Additional information regarding the meeting is available on the symposium web site: https://atrain2017.org/
Release of Level-2 Geostationary Cloud Products
Cloud type classification for 4 geostationary sensors - Image credit: NOAA/SATMOS/JMA/IPSL/ICARE
AERIS/ICARE Data and Services Center is pleased to announce the public release of cloud products derived from geostationary sensors in collaboration with Meteo-France/CMS/SATMOS and the Megha-Tropiques Science Team. The products (cloud mask, cloud type and cloud top pressure) are available over the period beginning with the Megha-Tropiques mission launch in October 2011 until present. This cloud information obtained at the highest spatial and temporal scale available is an important complement to the Megha-Tropiques mission, which aims at describing the radiative flux, the humidity profiles, and rain fields associated with tropical convection at a high temporal resolution.
Those cloud products are produced using an extended version of the SAFNWC (Satellite Application Facility for NowCasting) algorithm originally developed for SEVIRI by Derrien and Le Gleau (2005, 2010) and adapted to other geostationary data sets (Sèze et al. 2015).
For more information about products and data access, see the Megha-Tropiques 'Products' page (SAFNWC and GEOCLD section).
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)).
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).
Release of CALIPSO V3-00 Lidar Level-3 Aerosol product
The Atmospheric Science Data Center (ASDC) at NASA Langley Research Center in collaboration with the CALIPSO mission announces the release of the following monthly data products:
The monthly product is available beginning with data from June 2006 (following CALIOP first light on June 13, 2006) through current. The Version 1.00 and 1.30 CALIOP Level-3 Aerosol Profile data products will no longer be generated beyond September 2015.
Public release of Megha-Tropiques/SAPHIR
Relative Humidity profiles products – July 2015
The French Megha-Tropiques science team is pleased to announce the public release of the layer-averaged relative humidity profiles (L2-RH) derived from the SAPHIR instrument. This new Level-2 product is available from the start of the mission (October 2011) until present.
here to access the data from the ICARE archive interface (current version: v1.00).
The SAPHIR relative humidity profiles are produced for 6 altitude layers: 100-200hPa, 250-350hPa, 400-600hPa, 650-700hPa, 750-800hPa and 850-950hPa. The retrieval scheme named ARPIA ("Atmospheric Relative humidity profile Including the Analysis of confidence intervals") provides an estimate of the mean RH as well as its standard deviation interpreted as the 1-sigma confidence interval. ARPIA considers cloud-free and cloudy conditions, oceanic and continental scenes. Known limitations are for icy layers on top of convective clouds and for precipitating conditions, which are filtered out using the Hong et al. (2005) threshold method adapted for SAPHIR channels.
The details of the method will be soon available in a peer-reviewed paper.
Second announcement and call for abstracts
International conference on “Water and Energy cycles in the Tropics”
17-19 November 2015, Paris, France
Deadline for abstract submission extended to June 19
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.
The deadline for abstract submission is June 15, 2015 (extended to June 19).