Eyes in the sky: Meteosat third generation set to improve solar forecasting
Solar forecasting across Europe and Africa is set for a major upgrade as the Meteosat Third Generation (MTG) satellite begins operational testing, according to analysis of early operational data by the Solcast Data Science team. The new satellite, positioned at 0° longitude alongside its predecessor from the Meteosat Second Generation (MSG) series, delivers unprecedented improvements in spatial and temporal resolution, expanded spectral imaging capabilities, and new tools to enhance atmospheric monitoring.
Compared to the currently operational MSG satellites, MTG introduces sharper and more detailed, frequent imagery, providing a significant boost to solar irradiance estimates. Standard visible imagery now offers 1 km spatial resolution for whole-hemisphere scans,
compared to 3 km on MSG. High-resolution visible imagery improves to 0.5 km for targeted regions, delivering twice the level of detail. Temporal resolution has also increased, with new full-disk images captured every 10 minutes, improving on 15-minute intervals with MSG.
Over Europe, MTG’s rapid scan service will deliver updates every 2.5 minutes—twice as fast as MSG’s 5-minute scans—supporting more accurate live and nowcast irradiance estimations.
The MTG satellite also features 16 imaging channels, up from 13 on MSG, covering visible and infrared wavelengths. These additional channels enable better distinction between clouds, snow, dust, and sand in the atmosphere—key factors that influence irradiance. Improved spectral data supports more accurate identification of cloud types and heights, while also facilitating the tracking of atmospheric dust storms. In addition, the MTG satellite’s new lightning imager instrument will provide critical insights into severe weather patterns,
offering another layer of data relevant to solar generation forecasting.
With these improvements, the MTG satellite is set to enhance solar forecasts through higher-quality real-time and short-term cloud identification. Sharper, faster imagery improves cloud propagation forecasts, while better atmospheric data feeds into numerical weather
prediction (NWP) models—delivering more accurate long-term forecasts. Faster dissemination of satellite images, now split into 40 strips, ensures real-time data reaches forecasting systems with minimal delays, enabling more up-to-date irradiance estimates.
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