TAG: GNSS reflectometry

NASA launches micro satellites with GNSS receivers for remote weather sensing

December 15, 2016By
Once the deployment module on the Orbital ATK Pegasus XL launch vehicle reaches its final altitude of approximately 510 kilometers above the Earth’s surface, the eight CYGNSS microsatellite observatories will be deployed in opposing pairs over a two minute period. (Image credit: University of Michigan)

Surrey Satellite Technology’s Space GNSS Receiver Remote Sensing Instrument (SGR-ReSI) is the primary payload onboard NASA’s CYGNSS constellation, launched today, Dec. 15, from Cape Canaveral Air Force Station in Florida. The Cyclone Global Navigation Satellite System (CYGNSS) mission is part of the NASA Earth System Science Pathfinder Program that aims to improve extreme weather prediction by studying how tropical cyclones... read more

Wind-speed data based on ocean surface using GNSS-R

December 6, 2016By
The TechDemoSat-1 satellite, built by Surrey Satellite Technology Ltd. (Photo: SSTL)

The National Oceanography Centre (NOC) has developed global wind speed products based on reflected GPS signals, using data from the UK TechDemoSat-1 satellite, reports Hydro International. The achievement demonstrates the potential of GNSS reflectometry (GNSS-R) to improve sampling of ocean surface winds, as well as improve weather monitoring and forecasting by complementing existing satellite measurements from scatterometers and radiometers. The... read more

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New GNSS weather datasets available from TechDemoSat-1

November 29, 2016By
GNSS-R Data collections. The measured reflection tracks are shown in yellow over the Globe. A sequence of Delay Doppler Maps from one track is shown below — the spread of each is related to the sea surface roughness and surface wind speed.

New weather datasets, which could prove highly valuable for weather forecasting and for longer term climate monitoring, have just been made available from the Space GNSS Receiver-Remote Sensing Instrument (SGR-ReSI) instrument on board TechDemoSat-1, a small technology demonstration satellite launched by Surrey Satellite Technology Ltd (SSTL) in 2014. With support from the European Space Agency, SSTL and the National Oceanography... read more