Category Archives: earth observation

Soil Moisture retrieval from satellite SAR imagery

By Keith Morrison Soil moisture retrieval from satellite synthetic aperture radar (SAR) imagery uses the knowledge that the signal reflected from a soil is related to its dielectric properties. For a given soil type, variations in dielectric are controlled solely … Continue reading

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Observation uncertainty in data assimilation

By Sarah Dance Approximately 4 million properties in the UK are at risk from surface-water flooding which occurs when heavy rainfall overwhelms the drainage capacity of the local area. Several national weather centres have been developing new numerical forecasting systems … Continue reading

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Lakes from space

By Laura Carrea For the first time satellite technology has been used to make a census of global inland water cover. A number of 117 million lakes, reservoirs and wetlands of area >0.002 km2 have been found summing up to a … Continue reading

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How TAMSAT have been supporting African people for over 35 years

By Ross Maidment The University of Reading’s TAMSAT group ( www.tamsat.org.uk ) have helped pioneer the use of satellite imagery in rainfall estimation across Africa since the early 1980s when the group was first established. Thanks to some bright and innovative minds … Continue reading

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The value of future observations

By Alison Fowler The atmosphere and oceans are being routinely observed by a myriad of instruments. These instruments are positioned on board orbiting satellites, aircraft and ships, surface weather stations, and even balloons.  The information collected by these instruments can … Continue reading

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The driving mechanism of large-scale unsteady currents in the ocean

By Antoine Hochet During the last twenty years, measurements of the ocean surface properties by satellite instruments have significantly increased our knowledge of ocean dynamics. One of these instruments is an altimeter that measures the topography of the ocean surface … Continue reading

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Is it possible to predict inter-annual changes in terrestrial water storage at regional scales?

By Marie-Estelle Demory Our results say yes! It is possible to predict changes in terrestrial water storage, when the signal that drives the changes is strong enough. Here is an explanation. The hydrological cycle is a fundamental link between components of … Continue reading

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What will we have for launch?

By Chris Merchant We live during an era of Earth Explorers … not intrepid adventurers, but a series of Earth-orbiting satellites, bristling with experimental technology designed to quantify various aspects of the environments of our planet. Four Earth Explorers have … Continue reading

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