02/09/2025
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Lower than three weeks for the reason that first MetOp Second Era climate satellite tv for pc, MetOp-SG-A1, was launched, this outstanding new satellite tv for pc has already began transmitting information from two of its cutting-edge devices, providing a tantalising glimpse of what’s to come back.
The MetOp Second Era (MetOp-SG) mission builds on the confirmed success of the first-generation MetOp satellites, securing the stream of important information for international climate forecasting and local weather monitoring – whereas introducing main developments in efficiency and backbone.
As excessive and unpredictable climate occasions grow to be extra frequent, exact and well timed forecasting has by no means been extra vital. Working from polar orbit, the MetOp-SG satellites will present the important information wanted to strengthen climate prediction fashions and deepen our understanding of Earth’s altering local weather.
The mission consists of three successive pairs of satellites, every pair made up of an A-type and a B-type satellite tv for pc carrying complementary devices to seize a variety of observations.
This mission is the results of long-standing collaboration between ESA and Eumetsat. ESA is answerable for the design and growth of the satellites, whereas Eumetsat manages the launch providers, floor phase growth, satellite tv for pc operations and distribution of knowledge to the meteorological group.
Launched on 13 August, aboard an Ariane 6 rocket from the European Spaceport in French Guiana, Eumetsat is presently placing MetOp-SG-A1 via a rigorous commissioning part.
Regardless of this new satellite tv for pc solely being in orbit for 3 weeks and the commissioning is at a really early stage, its Microwave Sounder (MWS) and Radio Occultation (RO) sounder are already returning early ‘first glimpse’ information, marking a big milestone in a brand new period of European climate and local weather monitoring.
The MWS gives temperature and humidity profiles. It combines MetOp’s authentic Superior Microwave Sounding Unit-A (AMSU-A1 and AMSU-A2) and Microwave Humidity Sound (MHS) right into a single antenna instrument with new channels for temperature, humidity sounding and ice-cloud detection. The horizontal decision of the temperature sounding channels has improved from round 48 km to twenty km at nadir.
The instrument started sensing only one week after launch – and the putting picture introduced above is a 24-hour seize from 24 August from its Channel 17. Apart from Earth’s floor properties, this channel can also be delicate to convective clouds, proven as numerous filaments and banding constructions over the oceans. For example, the pink swirl seen within the North Atlantic displays the deep convective cloud system of ex-hurricane Erin.
The subsequent picture, from MWS Channel 2, clearly exhibits a swath of summer time ‘brightness temperatures’ (in Kelvin) over land and ocean over Europe.
In actuality, data from MWS’s 24 totally different channels is not going to be utilized in isolation, they are going to be mixed to yield atmospheric temperature and humidity information merchandise at totally different altitudes above Earth.
The RO sounder delivers detailed profiles of atmospheric temperature and humidity throughout each the troposphere and ionosphere. Constructing on the heritage of the first-generation GNSS Receiver for Atmospheric Sounding (GRAS) instrument on the primary era of MetOp satellites, the brand new instrument triples the variety of radio occultation measurements – offering greater than 1600 observations per day. This leap in protection is made attainable by incorporating indicators not solely from GPS, but in addition from Europe’s Galileo and China’s BeiDou satellite tv for pc navigation constellations.
Because the picture exhibits, the brand new protection consists of a lot of the worldwide ocean, the place information had been beforehand comparatively sparse.
The picture makes use of occultations between 20 and 26 August. The smaller plots present vertical temperature and humidity profiles derived from the instrument’s first measurements on 20 August over the Southern Pacific. The curves are plotted alongside ECMWF forecast information, revealing how RO measurements refine and replace temperature and humidity construction predictions, notably in data-sparse areas.
Each the MWS and RO will present inputs of unprecedented precision for numerical climate predication. Whereas these early indicators present that progress is constant at tempo, the information should not but operationally certified, and the commissioning of Metop-SG-A1 is predicted to require months of thorough testing and calibration earlier than any information are launched to Member State meteorological providers and different customers.
Phil Evans, Eumetsat Director-Basic, mentioned, “Receiving these first information so shortly is an exhilarating achievement for Eumetsat, notably contemplating the technological sophistication of Metop-SG-A1 and its payload.
“In collaboration with ESA and our European business companions, Eumetsat groups are working intensely to render all of the satellite tv for pc’s devices operational, and the truth that information is already flowing seamlessly from the MWS and the RO exhibits that we’re firmly heading in the right direction to having highly effective, validated merchandise prepared for our person group within the deliberate timeframe.”
Simonetta Cheli, ESA’s Director of Earth Remark Programmes, mentioned, “These first glimpses of knowledge are extraordinarily encouraging, and I need to thank all of the groups who’ve contributed –each to growing the mission as a complete and to working and commissioning MetOp-SG-A1 in orbit.
“This can be a main endeavor: six satellites in complete, flying in successive pairs and delivering vital information for at the least the following 20 years. Whereas we intently monitor MetOp-SG-A1’s early efficiency, we’re already within the closing phases of making ready its companion, MetOp-SG-B1, for launch subsequent yr. “Collectively, the polar-orbiting MetOp-SG mission and the geostationary Meteosat Third Era mission place Europe firmly on the forefront of worldwide climate forecasting.”
