Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Newly proposed reference datasets improve weather satellite data quality

10.01.2017

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of satellites whizzing around Earth collecting mountains of data makes such constant and wide-ranging access to accurate weather forecasts possible. Just one satellite, such as the National Oceanic and Atmospheric Administration's (NOAA) Geostationary Operational Environmental Satellite-R that launched in 2016, can collect 3.5 terabytes of weather data per day.


This is an artist's rendition of NASA's JPSS satellite, which carries a microwave instrument that can monitor Earth's weather from space.

Credit: NASA/NOAA

But how do scientists ensure satellite-measured weather data is good? They can compare live data against high-quality reference data from in-orbit satellites. Making such resources available is a goal of the Global Space-based Inter-Calibration System (GSICS), an international consortium of 15 satellite agencies that collaborate on monitoring satellites and developing methods to ensure the quality of their weather data.

"The quality of the satellite data drives how prepared nations--and the world--can be when it comes to weather-related events," said GSICS Deputy Director Manik Bali, a faculty research assistant in the Earth System Science Interdisciplinary Center (ESSIC), a joint center of the University of Maryland and NASA's Goddard Space Flight Center. Bali is also a NOAA affiliate.

The World Meteorological Organization (WMO), a United Nations specialized agency and the Coordination Group for Meteorological Satellites (CGMS), launched GSICS in 2005. ESSIC contributes manpower and infrastructure support to GSICS, including the servers needed to share data between GSICS collaborators worldwide, enabling the monitoring of weather satellites among member agencies and the correction of measurement anomalies in real time.

One GSICS breakthrough came in 2011, with a paper demonstrating that a GSICS-developed algorithm corrected a temperature difference of approximately 3 degrees Celsius between two satellites. The results were published in the Bulletin of the American Meteorological Society. While that temperature difference may sound small, the world's nations recently negotiated the Paris Climate Agreement, which seeks to limit global warming to a maximum of 2 degrees Celsius above pre-industrial temperatures.

Also in 2011, Cheng-Zhi Zou, a NOAA research scientist and former chair of the GSICS Microwave Subgroup, intercalibrated 38 years of climate data--starting in 1979--to generate what NOAA calls a fundamental climate data record (FCDR). The FCDR was published in the Journal of Geophysical Research: Atmospheres.

At the American Geophysical Union's (AGU) fall meeting in December 2016, Bali demonstrated that Zou's FCDR was suitable for monitoring microwave satellites, including the Advanced Technology Microwave Sounder onboard NOAA/NASA's Joint Polar Satellite System (JPSS). When launched, JPSS will replace the aging National Polar-orbiting Operational Environmental Satellite System and provide full global monitoring coverage twice a day. Bali expects the FCDR will help monitor and adjust data gathered during JPSS missions.

At the recent AGU meeting, Bali also showed that the European Organisation for the Exploitation of Meteorological Satellites' Infrared Atmospheric Sounding Interferometer (IASI) and NASA's Atmospheric Infrared Sounder exhibit sufficiently stable behavior to serve as in-orbit references. Calibrating against these satellites can reduce errors from 2 degrees Celsius to below 0.1 degrees Celsius.

"This has given tremendous confidence to the GSICS calibration community that uses IASI-A as an in-orbit reference to monitor its geostationary satellites," said Bali.

Moving forward, Bali's colleagues at ESSIC will continue to support the science goals of the JPSS satellite mission through the Cooperative Institute for Climate and Satellites (CICS), which is managed by ESSIC and was created in 2009 through a $93 million agreement with NOAA.

"ESSIC's leadership in supporting these global initiatives is very important," said Bali. "Looking ahead, I see a far greater interaction between NOAA and ESSIC/CICS, which will help NOAA lead the global satellite calibration efforts."

###

The presentation, "Selection of on-orbit references for Global Space Based Inter-Calibration System" by Manik Bali, Fuzhong Weng, Lawrence E Flynn, Cheng-Zhi Zou, Ralph Ferraro and Thomas Pagano was given on December 13, 2016, at the American Geophysical Union Fall Meeting.

The paper, "The Global Space-Based Inter-Calibration System" by M. Goldberg, G. Ohring, J. Butler, C. Cao, R. Datla, D. R. Doelling, V. Gärtner, T. Hewison, B. Iacovazzi, D. Kim, T. Kurino, J. Lafeuille, P. Minnis, D. Renaut, J. Schmetz, D. Tobin, L. Wang, F. Weng, X. Wu, F. Yu, P. Zhang, and T. Zhu was published in the April 2001 issue of the Bulletin of the American Meterological Society.

The paper, "Intersatellite calibration of AMSU-A observations for weather and climate applications" by Cheng-Zhi Zou and Wenhui Wang was published on December 13, 2011 in the Journal of Geophysical Research: Atmospheres.

Media Relations Contact: Irene Ying, 301-405-5204, zying@umd.edu

University of Maryland
College of Computer, Mathematical, and Natural Sciences
2300 Symons Hall
College Park, MD 20742
http://www.cmns.umd.edu
@UMDscience

About the College of Computer, Mathematical, and Natural Sciences

The College of Computer, Mathematical, and Natural Sciences at the University of Maryland educates more than 7,000 future scientific leaders in its undergraduate and graduate programs each year. The college's 10 departments and more than a dozen interdisciplinary research centers foster scientific discovery with annual sponsored research funding exceeding $150 million.

Media Contact

Irene Ying
zying@umd.edu
301-405-5204

 @UMDRightNow

http://www.umdrightnow.umd.edu/ 

Irene Ying | EurekAlert!

More articles from Physics and Astronomy:

nachricht Quantum optics allows us to abandon expensive lasers in spectroscopy
22.11.2017 | Lomonosov Moscow State University

nachricht Nano-watch has steady hands
22.11.2017 | University of Vienna

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Nanoparticles help with malaria diagnosis – new rapid test in development

The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.

Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....

Im Focus: A “cosmic snake” reveals the structure of remote galaxies

The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.

Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...

Im Focus: Visual intelligence is not the same as IQ

Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.

That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Ecology Across Borders: International conference brings together 1,500 ecologists

15.11.2017 | Event News

Road into laboratory: Users discuss biaxial fatigue-testing for car and truck wheel

15.11.2017 | Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

 
Latest News

Corporate coworking as a driver of innovation

22.11.2017 | Business and Finance

PPPL scientists deliver new high-resolution diagnostic to national laser facility

22.11.2017 | Physics and Astronomy

Quantum optics allows us to abandon expensive lasers in spectroscopy

22.11.2017 | Physics and Astronomy

VideoLinks
B2B-VideoLinks
More VideoLinks >>>