A new weather satellite is circling the earth. The JPSS-1 satellite, launched this weekend (18 November 2017) will provide a huge array of observational, near real-time, data which will be shared with US national and international partners including the Met Office.

An artist impression of JPSS-1 in orbit. Image courtesy of NOAA.

As well as gathering day to day weather data the satellite will monitor a wide range of events such as wildfires, snow cover, sea-surface temperature and aerosol detection, important in air quality monitoring. In addition, the satellite will measure the radiation coming from the earth and atmosphere, vital information for weather forecasting models such as those run by the Met Office.

Weather satellites perform a largely unseen but nevertheless essential role and their impact on our daily weather forecasts cannot be overestimated. The launching of this new satellite from the Vandenberg Air Force Base in California comes closely on the heels of the 30^th anniversary of the Great Storm of October 1987. Many of us remember the devastation the storm bought to the southern half of the UK. Back in 1987 the Met Office was receiving very few daily observations from satellites. Today most of the 215 billion observations received daily by the Met Office are from satellites, these provide 65% of the observations used in the Met Office’s Global Numerical Weather Prediction model. Satellite data is behind major improvements in forecasting model accuracy levels over recent years, on a scale that former generations of weather forecasters could only imagine.

Dr Simon Keogh, who leads the satellite data, products and systems team for the Met Office, said: “The value we all get from satellites is simply enormous. Earth observations are an essential foundation on which Met Office services are built. They will help us deliver an expected overall £30bn socio-economic benefit over the coming decade, a 14 fold return on investment in the organisation, and will help us ensure the protection of people, property, businesses and critical national infrastructure.”

Wildfires burning in Portugal on 20 June 2017. False colour image from the VIIRS imager on the Suomi NPP satellite. Image courtesy of NASA.

This new satellite provides a valuable US contribution to the Global Observing System that will complement the data provided to the Met Office by our work with European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT).

In addition to operating satellites, EUMETSAT also runs a satellite-reception station in Svalbard in the Norwegian Arctic, an essential part of the network to get the vast quantities of data gathered by satellites to the organisations that use it. At this latitude the station will receive information bursts from the new JPSS-1 up to 14 times per day.

Svalbard satellite receiving station in Norway. Image courtesy of EUMETSAT.

Dr Keogh concluded: “The new data will help drive our numerical weather prediction models and it will provide products for a wide range of earth observation applications from weather forecasting to oceanography.”

For more information and educational resources about JPSS-1 please visit the NOAA JPSS website.