October 2, 2013
First observation of ozone plumes in the very low troposphere from satellite data
For the first time, thanks to a new method based on the synergy measurements of IASI probe in the infrared and GOME-2 in the ultraviolet, ozone plumes located in the very low troposphere (under 3 km altitude) could be observed and their ozone content estimated using only satellite data. this unprecedented method was developped by scientists from the LISA/IPSL (Laboratory Inter-universitaire des Systèmes Atmosphériques, CNRS / UPEC / Paris Diderot University), in collaboration with the Harvard-Smithsonian center for astrophysics (USA), the Karlsruhe Institut für Technologie (Germany) and the Chinese academy of sciences (China). this major progress will allow to improve the characterization and the forecast of the quality of the air at regional and global scales.
Source: CNRS-INSU news, the complete news is available on the INSU website (in French)
4 au 8 février 2013
February 4 to 8, 2013
The next IASI conference will be held from 4 to 8 February 2013
The next IASI conference will be held in Hyères from 4 to 8 February 2013. This conference will be an opportunity to review the results of 6 years of operating data from the IASI instrument on the orbiting satellite Metop-A since 2006. It will also prepare for the arrival of data from the second model launched on September 17 with Metop-B.
For more information about this conference, please visit http://www.iasi2013.com/accueil.html
January 10, 2013
November 22, 2012
November 7, 2012
October 30, 2012
IASI/METOP-B: successful functional in-flight commissioning
This first IASI/METOP-B spectrum, acquired over the Davis strait between Groenland and Canada, could be mistaken for the first spectrum obtained by IASI/METOP-A nearly 6 years ago.
It is a very good sign!
First IASI/METOP-B spectrum
Functionaly, the instrument is fully operational, the "in-flight commissioning" team composed of instrument and command/control skills now hands over the work to the CAL/VAL team, located at the Technical Expertise Centre which is lead by the IASI performance expert. Now they need to finalize the fine tuning of the instrument and the processing chains so that IASI/METOP-B, as its in orbit predecessor, produce validated data that can be used by the weather forecast centers of the world, the atmosphere chemistry scientists, the air warning systems for the volcano plumes, the pollution monitoring, the long term climate monitoring...
Read the CNES - EUMETSAT Press Release
October 23, 2012
First heart beat for IASI/METOP-B
Here is the first electrocardiogram of IASI/METOP-B (in technical speach the first PPD of the CCM (Cube Corner Mechanism)): it is perfect!
IASI heart beats very well, promising for the next in-flight commissioning operations! IASI should open its eyes in the next few hours.
PDD CCM Auxiliary mode Metop-B 23/10/12
October 19, 2012
IASI/METOP-A celebrates today its six anniversary in orbit
Today IASI/METOP-A celebrates its 6 years in orbit with its twin on METOP-B, still in functional in-flight commissioning.
IASI/METOP-A performances are still excellent and they will be presented during the REVEX (Exploitation Review) on December 13, at CNES (Toulouse, France).
IASI/METOP-B passed the decontamination phase that consisted in getting rid of every traces of pollutants in the detection cavity. The corner cube, mechanical heart of the instrument, has been released. The functional in-flight commissioning is nominal and should finish by the end of October. The validation and calibration phase will follow to ensure the optimal performance of the instrument as well as the ground processing chain.
The image below shows the last view of IASI/METOP-B, before its installation under the Soyouz fairing. It is one of the rare images where a "naked" IASI can be seen, without its protective elements.
View of IASI on METOP-B during the installation
under the fairing, in Baikonur, in September 2012.
© M. Cohen - Eumetsat - 2012
September 17, 2012
Successful launch of Metop-B satellite
The Metop-B satellite including the second model of IASI was successfully launched on September 17 from the Baikonur Cosmodrome with a Soyuz rocket. The role of Metop-B is to ensure continuity of observations from a polar orbit. It will take over from Metop-A, which was launched in 2006 and has exceeded its initial lifetime of 5 years. The two satellites should be used together in the first place, which will temporarily allow inter-calibrations and the production a larger number of measurements.
After the sequence enabling the switching of the platform to routine configuration, the anti-contamination lines protecting the entry of IASI cold box from contamination, have been turned ON at 00h02 on the 18/09/12.
IASI is in survival configuration, the survival thermal control converge and function correctly.
After the PLM (Payload Module) configuration activities, IASI will be switched ON on the 21/09/12. IASI first level thermal control will then be activated and should converge on the 22/09/12 morning allowing switching IASI in DECONTAMINATION mode for 21 days, in order to eliminate the pollutants due to the launch and after desorption of the equipments.
At the end of this phase the cube corners mechanisms will be unlocked, the software configured, and IASI will pass in operational mode. A first initialization of the on board science data processing algorithms will be realized on the 23/10/12 for an end of in flight commissioning scheduled on the 29/10/12. Then the CALVAL phase will begin and will consist in realizing a fine tuning of the on board and ground algorithms, in order to optimize the instrument performances.
Read also the CNES/CNRS/Meteo-France press release (in French) or the EUMETSAT press release.
September 5, 2012
Smelling sulphur dioxide
While piloting a commercial transatlantic flight last year, Captain Klaus Sievers and his crew got a whiff of an unusual odour. In a confined space 10 km up in the air, there was only one thing it could be.
The foul smell with traces of sulphur in the cockpit came from none other than the Grímsvötn volcano that was spewing gas and ash from southeast Iceland.
Once landed, Captain Sievers, a representative of the German Airline Pilots' Association, used data from the MetOp satellite via the Support to Aviation Control Service - SACS - to confirm the sulphur dioxide.
It proved particularly useful when planning his route from the Far East to Europe on 15 June. A day earlier, the Nabro volcano had erupted in Eritrea, spewing ash across his intended route over East Africa and the Middle East.
On 14 June 2011, the IASI instrument on MetOp-A satellite detected sulphur dioxide over East Africa and the Middle East. The sulphur dioxide plume came from the Nabro volcano in Eritrea. Credits: ULB
Read the complete news on ESA's website.
IASI's lastest news before its wake-up in orbit
From July 31 to August 8, in Baikonur, a part of the IASI team proceeded to a functional test of the instrument, last opportunity to acquire a good health status. And... everything is ok!
The final configuration setup for the launch will take place at the beginning of September while CNES team that will perfom the in-flight commissioning will be in Darmstadt, at the control center for METOP EUMETSAT, to realise a final rehearsal.
Next rendez-vous after METOP-B launch on September 17: Switch-on around September 21, the first science data (spectra, interferograms and images) should be recieved by the end of October by the Technical Expertise Center team at CNES, Toulouse.
CNES and TAS IASI teams during the August 2012 campaign in Baikonur. Behind, METOP-B satellite, with IASI instrument (in the lowest left part).
Credit: ASTRIUM - 2012 MetOp Launch campaign in Baikonur.
June 28th, 2012
New launch date confirmed for Metop-B
The revised launch date for the Metop-B satellite from the Baikonur Cosmodrome has been set for 19 September 2012.
The launch campaign will resume in early July. The Metop-B satellite is being stored in a controlled environment in the Starsem facilities in Baikonur and will be subject to a set of tests and preparatory activities until its fuelling which is currently planned for August.
April 27th, 2012
MetOp-B launch postponed
Eumetsat and the European Space Agency (ESA) have been informed by the launch service provider, Starsem, that the launch of the MetOp-B satellite by a Soyuz rocket, scheduled for 23 May from Baikonur, had to be postponed.
The launch has been postponed for some weeks, until appropriate measures are implemented. It is expected to take place in the second half of July.
For more information, read the article on ESA website.
March 20th, 2012
Europe's next weather satellite gears up for launch
Following the safe arrival of the MetOp-B weather satellite in Kazakhstan, the sophisticated craft is now being carefully assembled and tested before launch on 23 May. MetOp-B will provide essential data for weather forecasting.
For more information, read the article on ESA website.
December 18th, 2011
New satellite observations revealed a link between forests and acid rains
A LATMOS/IPSL (CNRS/UPMC/UVSQ) team, in collaboration with belgian scientists from IASB(Institut d'Aéronomie Spatiale de Belgique) and from ULB (Université Libre de Bruxelles), shown the existence of a major formic acid source above boreal and tropical forests. The formic acid is identified as the main responsible for the acid rains in these regions. These results, obtained thanks to infrared measurements from the French instrument IASI on board the meteorological satellite MetOp, are published on line in the scientific review Nature Geoscience on Decembre 18, 2011.
For more information, read the Press Release (in French).
October 6-7th, 2011
Fifth meeting of the ISSWG-2 at Perros-Guirec, France
The cleaning of the atmosphere by tropical storms detected by IASI
The Infrared Atmospheric Sounding Interferometer IASI allows the measurement of the tropospheric content of some atmospheric trace gases (e.g. O3, CO) with an unprecedented spatiotemporal coverage. The O3 data produced by the Laboratoire d'Aérologie with the SOFRID (SOftware for a Fast Retrieval of IASI Data) enabled us to monitor the evolution of O3 above South Asia and to quantify the cleaning operated by tropical storms over the Bay of Bengal and central India. During the highly polluted period following the Monsoon, the lower-middle troposphere of the Indian sub-continent is characterized by high O3 concentrations.
However, the analysis of the tropospheric O3 quantities determined by IASI, have shown important and fast (24 hours) decreases of these concentrations over the Bay of Bengal and India during the fall of 2008 (see Figure below). The comparison with airborne O3 data from the MOZAIC programme measured around Hyderabad airport in central India have confirmed those abrupt O3 variations. The analysis of the meteorological situation and of the air masses origin have shown that the O3 drops were linked to the crossing over India of two violent tropical storms (Khai-Muk on November 15 and Nisha on November 27). Coming from the south of the Bay of Bengal the storms have replaced the polluted air by clean air from the marine boundary layer.
Tropospheric O3 integrated columns (surface-225 hPa) determined with the IASI-SOFRID software developed at the Laboratoire d'Aérologie in Toulouse for (a) 10-11-12 Nov. 2008, (b) 16-17-18 Nov. 2008, after the crossing of Khai-Muk storm, (c) 24-25-26 Nov. 2008, (d) 28-29-30 Nov. 2008, after the crossing of Nisha storm.
Read the complete publication on "Atmospheric Chemistry and Physics" web site
A gush of volcanic gas seen by IASI
This image shows the huge plume of sulphur dioxide that spewed from Chile's Puyehue-Cordón Caulle Volcanic Complex, which lies in the Andes about 600 km south of Santiago.
Huge plume of sulphur dioxide seen by IASI on June 6th, 2011 - © LATMOS
Read the complete news on ESA website
IASI measures the record decrease of ozone at North Pole
The exceptional meteorological conditions lead to an unprecedented ozone decrease in Arctic this spring. By the end of March, observations (ground and satellite) as well as French models agree and indicate a decrease reaching about 40% since the beginning of winter. This phenomenon can be explained by a very cold and lasting winter in the stratosphere which lead to an intensifying of the ozone destruction processes due to the accumulation of chlorinated and bromated compounds.
Ozone distributions measured by IASI from March 1st to April 1st, 2011 - © LATMOS
Read the complete news on INSU website (in French)
Also see the data on LATMOS website (in French)
Latest Update 08/10/2013