Lift-off for Sentinel-3B climate satellite for real time data

Posted by ap507 at Apr 26, 2018 09:21 AM |
Sentinel-3B will join its sister Sentinel-3A in orbit to provide real time observations of the Earth’s surface

Issued by University of Leicester on behalf of the National Centre of Earth Observation on 26 April 2018

Images available via Dropbox here:

UK scientists at the National Centre of Earth Observation (NCEO) today welcomed the successful launch of the newest satellite in Europe’s Copernicus programme, Sentinel-3B.

The NCEO is a distributed centre with over 100 scientists from UK institutions, led by Professor John Remedios at the University of Leicester.

The Sentinel-3B will join its sister Sentinel-3A in orbit to provide real time observations of the Earth’s surface. As well as measuring the oceans, the two satellites will provide unique and timely information about changing land cover, vegetation, urban heat islands, and for tracking wildfires.

The two satellites will fly in tandem to provide better estimates of the quality of data coming from both satellites. This so-called ‘cross-calibration’ is essential for deriving accurate long-term climate data records, an area in which the UK has world-class capability.

One of the five instruments on board Sentinel-3B is the Sea and Land Surface Temperature Radiometer (SLSTR), which was developed and calibrated at the Science and Technology Facilities Council’s RAL Space facility in Oxfordshire.  The exceptionally high quality of the instrument’s measurements of global sea surface temperature will greatly benefit weather and marine forecasters and their services. NCEO-Reading’s Professor Chris Merchant, and Drs Owen Embury, Claire MacIntosh and Kevin Pearson have defined the methods for delivering these measurements.

Speaking from the a meeting of the international space co-ordination body, the Committee on Earth Observation Satellites, Professor John Remedios, Director of NCEO, said: “Sentinel-3B marks an important step  forward in our capability to provide high quality data as fast as possible for wherever people live and move. Together with Sentinel-3A, it marks a point of markedly improved precision and regional representations in our climate records for land, ocean and particles in the atmosphere”

Scientists in NCEO are leading worldwide efforts to produce climate records for sea and land surface temperatures, ocean chlorophyll and phytoplankton, aerosols and clouds.

NCEO’s Bob Brewin, based at Plymouth Marine Laboratory, uses Sentinel-3 data to understand marine biogeochemistry. His citizen science projects have involved measuring key environmental indicators such as water temperature and water quality. This includes detecting chlorophyll in the ocean (see Figure 1 in Dropbox).

Brewin’s colleague at Plymouth Marine Laboratory, Dr Ben Taylor, uses satellite data to monitor organic particles in the ocean such as sulphur plumes (see Figure 2 in Dropbox), which can have severe impacts on commercially important fisheries.

NCEO-Leicester’s Dr Darren Ghent is working on a project to produce datasets of land surface temperature, using satellite data to provide the best possible global coverage, including information about the diurnal cycle (see Figure 3 in Dropbox)

Ghent said, “The Sentinel-3A mission has been providing high quality land surface temperature (LST) data on a routine basis through Copernicus since 5th July 2017. The launch of Sentinel-3B begins the next phase of the Sentinel-3 series, which will expand capability to deliver increased coverage of LST to the science community.”

Professor Martin Wooster and Dr Weidong Xu, of NCEO-King’s College London, use satellite Sentinel-3A, and will use Sentinel-3B, to measure Earth's landscape fires. The Sentinel-3A and 3B satellites are capable of monitoring large forest fires that can sometimes threaten semi-urban areas. They can also detect the far smaller, but extremely numerous, agricultural fires that threaten air quality in cities (see Figure 4 in Dropbox). Wooster and Xu are involved in developing and testing the algorithms that will turn the raw SLSTR observations into fire information on a daily basis once the two satellites are operating concurrently.


About the National Centre for Earth Observation

The National Centre for Earth Observation (NCEO) is a distributed centre with over 100 scientists from UK institutions, led by Professor John Remedios at the University of Leicester. It provides NERC with national capability in Earth observation science and incorporates world-class capabilities in interpretive Earth observation to meet the needs of society through long-term core science and translation of knowledge and environmental data for government and business.

NCEO has world-class capabilities in processing and analysing the vast quantities of data generated by satellites, aircraft and ground-based instruments to monitor and understand global and regional environmental change.

For more information, including to speak to the scientists concerned, please contact

STFC RAL Space is an integral part of the UK’s Science and Technology Facilities Council and carries out world-class space research and technology development with involvement in over 210 space missions to date.


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