Jason-2 Satellite

Successful Ocean-Monitoring Satellite Mission Ends

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Esprit Smith, Jet Propulsion Laboratory, Pasadena, Calif.
esprit.smith@jpl.nasa.gov

Pascale Bresson, CNES, Paris, France
pascale.bresson@cnes.fr

Raphaël Sart, CNES, Paris, France
raphael.sart@cnes.fr

John Leslie, NOAA National Environmental Satellite and Information Service, Silver Spring, Md.
john.leslie@noaa.gov

Neil Fletcher. EUMETSAT, Darmstadt, Germany
neil.fletcher@eumetsat.int

 

JASON2-2-16
Jason-2/OSTM contributed to a long-term record of global sea levels. This image shows areas in the Pacific Ocean where sea levels were lower (blues) or higher (reds) than normal during the first week of January 2018. Credit: NASA/JPL-Caltech

 

The Jason-2/Ocean Surface Topography Mission (OSTM), the third in a U.S.-European series of satellite missions designed to measure sea surface height, successfully ended its science mission on Oct. 1. NASA and its mission partners made the decision to end the mission after detecting deterioration in the spacecraft’s power system.

Jason-2/OSTM, a joint NASA mission with the French space agency Centre National d’Etudes Spatiales (CNES), the National Oceanic and Atmospheric Administration (NOAA), and the European Organisation for the Exploitation of Meteorological Satellites (EUMETSAT), launched in June 2008. The mission extended the long-term record of sea surface height measurements started by the NASA-CNES TOPEX/Poseidon and Jason-1 missions. Jason-2/OSTM’s 11-year lifetime well exceeded its three-year design life. These measurements are being continued by its successor, Jason-3, launched in 2016.

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NASA: Bangladesh Announces Nationwide Use of SERVIR Satellite-based Flood Forecasting and Warning System

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Upper row: The Ganges Brahmaputra Meghna (GBM) river basins and the Ganges-Brahmaputra (GB) delta. Bottom row: The many river deltas (shown as a triangle in each region) located in large remote river basins that lack information for modeling rivers and water management. Image Credit: NASA SERVIR

Bangladesh officials have announced plans to expand a satellite-based flood forecasting and warning system developed by SERVIR to aid an area where floodwaters inundate from 1/3 to 2/3 of the country annually, killing hundreds of people and affecting millions. The system, which relies on river level data provided by the Jason-2 satellite, last year provided the longest lead time for flood warnings ever produced in Bangladesh.

SERVIR is a joint development initiative of NASA and USAID, working in partnership with leading regional organizations around the globe to help developing countries use information provided by Earth Observing satellites and geospatial technologies for managing climate risks and land use. SERVIR and the International Centre for Integrated Mountain Development based in Kathmandu, Nepal, developed the Jason-2 based flood forecasting and warning solution.

“Forecasters have the dream to extend lead time for flood warnings,” said Amirul Hossain, executive engineer for the Bangladesh Water Development Board. “By using Jason-2 near real-time data, we made a real step forward in the flood forecasting system in Bangladesh.”

About 80 million people depend on the BWDB Flood Forecasting and Warning Center flood warnings. This organization has progressively built and expanded its flood forecasting system. However, without data from Jason-2, warnings were issued just three to five days in advance of flooding. During the 2014 monsoon season, the FFWC used the new Jason-2 solution experimentally and was able to forecast flooding eight days in advance at nine locations of the Ganges and Brahmaputra River Basins in the north, northwest, and central part of the country.

SERVIR Applied Sciences Team member Faisal Hossain developed the new system. Hossain and the International Centre for Integrated Mountain Development trained FFWC officials to use it. FFWC quickly FFWC mastered use of the system and became completely independent in using the satellite technology and processing tools, generating warnings at several locations inside Bangladesh.

Jason-2’s radar altimeter measures the precise distance between the satellite and the river surface at points where the satellite crosses overhead. The data, available almost immediately, reveals the river’s height at the point of crossing, so flood risks downstream can be assessed.

Based on the new solution’s successes, FFWC officials announced their intention to expand Jason-2 based forecasting system nation-wide in Bangladesh for 2015.

“We hope this is the beginning of a new journey, a new era for further development of the flood early warning system using space data or space technology,” said Hossain. “In the coming year, with support provided by the NASA SERVIR team, we would like to expand the system to many other locations where possible, to enable more people to benefit from this system by receiving more extended lead time for flood forecasts.”

The SERVIR project operates via regional “hubs” in Nairobi, Kenya; Kathmandu, Nepal; and Bangkok, Thailand. The coordination office for SERVIR is located at NASA’s Marshall Space Flight Center in Huntsville, Alabama.

For more information about SERVIR, visit:

http://www.nasa.gov/mission_pages/servir/

https://www.servirglobal.net/

Janet Anderson
Marshall Space Flight Center, Huntsville, Alabama
256-544-0034
janet.l.anderson