AVISO Altimetry News

New Mean Sea Surface

AVISO News of Other Altimeter Missions - Sun, 2017-03-26 23:43
The key points of this CNES_CLS 2015 MSS are:
  • a drastic improvement of the shortest wavelengths,
  • a better correction of the oceanic variability,
  • more accuracy near the coast.
  • globally, strong reduction of errors when computing SLA
  • more homogeneity of accuracy compared to the former versions
This new version is based on a 20-year period (1993-2013) of altimetry data (mean profiles, geodetic mission and SLA): mean profiles from Topex/poseidon, ERS-2 , GFO, Jason-1, Jason-2, and Envisat; geodetic phase from ERS-1, Jason-1 and Cryosat-2. Further information:
  • Data: Auxiliary products: Mean Sea Surface
Categories: AVISO Altimetry News

New Mean Sea Surface

AVISO Lively Data - Sun, 2017-03-26 23:43
The key points of this CNES_CLS 2015 MSS are:
  • a drastic improvement of the shortest wavelengths,
  • a better correction of the oceanic variability,
  • more accuracy near the coast.
  • globally, strong reduction of errors when computing SLA
  • more homogeneity of accuracy compared to the former versions
This new version is based on a 20-year period (1993-2013) of altimetry data (mean profiles, geodetic mission and SLA): mean profiles from Topex/poseidon, ERS-2 , GFO, Jason-1, Jason-2, and Envisat; geodetic phase from ERS-1, Jason-1 and Cryosat-2. Further information:
  • Data: Auxiliary products: Mean Sea Surface
Categories: AVISO Altimetry News

New Mean Sea Surface

AVISO News of the Jason-2 Altimeter - Sun, 2017-03-26 23:43
The key points of this CNES_CLS 2015 MSS are:
  • a drastic improvement of the shortest wavelengths,
  • a better correction of the oceanic variability,
  • more accuracy near the coast.
  • globally, strong reduction of errors when computing SLA
  • more homogeneity of accuracy compared to the former versions
This new version is based on a 20-year period (1993-2013) of altimetry data (mean profiles, geodetic mission and SLA): mean profiles from Topex/poseidon, ERS-2 , GFO, Jason-1, Jason-2, and Envisat; geodetic phase from ERS-1, Jason-1 and Cryosat-2. Further information:
  • Data: Auxiliary products: Mean Sea Surface
Categories: AVISO Altimetry News

Jason-3 integrated in the Mean Sea Level processing

AVISO News of Other Altimeter Missions - Fri, 2017-03-24 01:57
Almost three quarters of the Earth’s surface are covered by oceans: oceans are a key-element of our global climate system. It is a reality, the oceans respond to climate change: as a result of human activity and greenhouse gases, the climate is warming, the ocean expands and its level rises. Oceans are under close surveillance at all times: altimetry satellites accurately measure the sea level with a homogeneous and continuous global coverage since the launch of Topex-Poseidon in 1992. The Jason-3 mission complements this satellite constellation in flight by providing continuity of measurements that is essential for observing climate change. --> Use the interactive tool enabling to plot and download the Mean Sea Level trend times series and maps by selecting an area, a time-period (for time series only), one or several satellite missions. Further information:
  • Ocean indicators: Mean Sea Level, Processing and Corrections
  • Altimetry in videos for Jason-3 launch: Mean Sea Level
  • Applications: Mean Sea Level, Greenhouse effects
Categories: AVISO Altimetry News

Jason-3 integrated in the Mean Sea Level processing

AVISO Lively Data - Fri, 2017-03-24 01:57
Almost three quarters of the Earth’s surface are covered by oceans: oceans are a key-element of our global climate system. It is a reality, the oceans respond to climate change: as a result of human activity and greenhouse gases, the climate is warming, the ocean expands and its level rises. Oceans are under close surveillance at all times: altimetry satellites accurately measure the sea level with a homogeneous and continuous global coverage since the launch of Topex-Poseidon in 1992. The Jason-3 mission complements this satellite constellation in flight by providing continuity of measurements that is essential for observing climate change. --> Use the interactive tool enabling to plot and download the Mean Sea Level trend times series and maps by selecting an area, a time-period (for time series only), one or several satellite missions. Further information:
  • Ocean indicators: Mean Sea Level, Processing and Corrections
  • Altimetry in videos for Jason-3 launch: Mean Sea Level
  • Applications: Mean Sea Level, Greenhouse effects
Categories: AVISO Altimetry News

Jason-3 integrated in the Mean Sea Level processing

AVISO News of the Jason-2 Altimeter - Fri, 2017-03-24 01:57
Almost three quarters of the Earth’s surface are covered by oceans: oceans are a key-element of our global climate system. It is a reality, the oceans respond to climate change: as a result of human activity and greenhouse gases, the climate is warming, the ocean expands and its level rises. Oceans are under close surveillance at all times: altimetry satellites accurately measure the sea level with a homogeneous and continuous global coverage since the launch of Topex-Poseidon in 1992. The Jason-3 mission complements this satellite constellation in flight by providing continuity of measurements that is essential for observing climate change. --> Use the interactive tool enabling to plot and download the Mean Sea Level trend times series and maps by selecting an area, a time-period (for time series only), one or several satellite missions. Further information:
  • Ocean indicators: Mean Sea Level, Processing and Corrections
  • Altimetry in videos for Jason-3 launch: Mean Sea Level
  • Applications: Mean Sea Level, Greenhouse effects
Categories: AVISO Altimetry News

12-19 March, 2017 week

AVISO News of Other Altimeter Missions - Thu, 2017-03-23 08:07
Réchauffement climatique : l'ONU tire la sonnette d'alarme (France Info, 2017/03/21)
Pérou : des inondations ont fait au moins 65 morts depuis janvier (France 24, 2017/03/18)
Changement climatique : les océans se réchauffent plus vite que prévu (Numerama, 2017/03/13)
Un glacier bolivien préservé en Antarctique (Tribune de Genève, 2017/03/12)
UNE ÉPONGE GÉANTE POUR NETTOYER L'OCÉAN APRÈS UNE FUITE DE PÉTROLE (Le Monde, 2017/03/11)
On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.

Categories: AVISO Altimetry News

12-19 March, 2017 week

AVISO Lively Data - Thu, 2017-03-23 08:07
Réchauffement climatique : l'ONU tire la sonnette d'alarme (France Info, 2017/03/21)
Pérou : des inondations ont fait au moins 65 morts depuis janvier (France 24, 2017/03/18)
Changement climatique : les océans se réchauffent plus vite que prévu (Numerama, 2017/03/13)
Un glacier bolivien préservé en Antarctique (Tribune de Genève, 2017/03/12)
UNE ÉPONGE GÉANTE POUR NETTOYER L'OCÉAN APRÈS UNE FUITE DE PÉTROLE (Le Monde, 2017/03/11)
On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.

Categories: AVISO Altimetry News

12-19 March, 2017 week

AVISO News of the Jason-2 Altimeter - Thu, 2017-03-23 08:07
Réchauffement climatique : l'ONU tire la sonnette d'alarme (France Info, 2017/03/21)
Pérou : des inondations ont fait au moins 65 morts depuis janvier (France 24, 2017/03/18)
Changement climatique : les océans se réchauffent plus vite que prévu (Numerama, 2017/03/13)
Un glacier bolivien préservé en Antarctique (Tribune de Genève, 2017/03/12)
UNE ÉPONGE GÉANTE POUR NETTOYER L'OCÉAN APRÈS UNE FUITE DE PÉTROLE (Le Monde, 2017/03/11)
On line availability of articles depends on the Newspaper/magazine. We can't thus certify that above articles will be freely and permanently available.

Categories: AVISO Altimetry News

[Jason-2] after the Safe Mode, nominal activities restart

AVISO News of Other Altimeter Missions - Wed, 2017-03-22 08:55
The PMA GPS OnBoard SoftWare has been uploaded successfully on Jason-2's spacecraft. Nominal recovery activities restart today (2017/03/22). The exact foreseen sequence for restart is now to switch on Poseidon, AMR and GPSP on Friday 24th around 10:30UTC (2017/03/24). This means that the first products should be available around 13:00UTC, after a first orbit of measurements. However, please note that those first products could be impacted by the drag make-up maneuver that needs to be performed around 13:00UTC. Christophe Marechal, JA2/3 CNES project manager, on behalf of Jason-2 project managers from NOAA, EUMETSAT and JPL Linked articles:
  • [Jason-2] Jason-2 in safe mode since March 15th, 19:19 UTC
Categories: AVISO Altimetry News

[Jason-2] after the Safe Mode, nominal activities restart

AVISO Lively Data - Wed, 2017-03-22 08:55
The PMA GPS OnBoard SoftWare has been uploaded successfully on Jason-2's spacecraft. Nominal recovery activities restart today (2017/03/22). The exact foreseen sequence for restart is now to switch on Poseidon, AMR and GPSP on Friday 24th around 10:30UTC (2017/03/24). This means that the first products should be available around 13:00UTC, after a first orbit of measurements. However, please note that those first products could be impacted by the drag make-up maneuver that needs to be performed around 13:00UTC. Christophe Marechal, JA2/3 CNES project manager, on behalf of Jason-2 project managers from NOAA, EUMETSAT and JPL Linked articles:
  • [Jason-2] Jason-2 in safe mode since March 15th, 19:19 UTC
Categories: AVISO Altimetry News

[Jason-2] after the Safe Mode, nominal activities restart

AVISO News of the Jason-2 Altimeter - Wed, 2017-03-22 08:55
The PMA GPS OnBoard SoftWare has been uploaded successfully on Jason-2's spacecraft. Nominal recovery activities restart today (2017/03/22). The exact foreseen sequence for restart is now to switch on Poseidon, AMR and GPSP on Friday 24th around 10:30UTC (2017/03/24). This means that the first products should be available around 13:00UTC, after a first orbit of measurements. However, please note that those first products could be impacted by the drag make-up maneuver that needs to be performed around 13:00UTC. Christophe Marechal, JA2/3 CNES project manager, on behalf of Jason-2 project managers from NOAA, EUMETSAT and JPL Linked articles:
  • [Jason-2] Jason-2 in safe mode since March 15th, 19:19 UTC
Categories: AVISO Altimetry News

22 March, World Water Day: views from space

AVISO News of Other Altimeter Missions - Wed, 2017-03-22 00:21
Fresh water, essential for all life on Earth, is present in a finite amount on our planet (only 0.007% of all the planet's water is accessible for human consumption via rivers, streams, reservoirs and lakes).

In particular, it is essential for human activities. The consumption of fresh water is growing three times faster than the population. But global water resources are shared unequally between countries and continents: Asia accounts for 60% of the world’s population but has only 36% of its water, while South America has only 7% of the population but 30% of the water.

Today, water is no longer simply a problem for "poor countries": drought is increasingly afflicting areas of China, the USA, Australia and Europe. Aquifers are drying up and pollution and salinity are reducing water reserves even further. It has become essential to introduce tools to optimise the management of these resources.

At the moment, hydrology is essentially based on probes and gauging stations installed in situ at the edges of watercourses or lakes. But these instruments are distributed very unevenly across the surface of the globe, and it is often difficult to keep them properly maintained and calibrated. Satellite-based observation helps ensure the regularity and homogeneity of measurements from all over the planet. Satellite missions have led to major advances in environmental studies, including in the management of water resources. Among other achievements, nadir altimetry can acquire the height of the water of certain lakes or rivers, and the wide-swath altimetry made possible by SWOT will soon extend this possibility to include all inland waters.

Precipitation, evaporation and evapotranspiration, water levels and surface areas, the extent of frozen regions, soil moisture, groundwater reserves, water quality, surface water temperature, depth, mapping of watersheds – all this information can be and already is being provided today by Earth observation satellites. In addition, by combining all these sources, combining some of them with in situ measurements and/or with models, synoptic maps can be compiled on the situation of a watershed, a water deficit for example, risk maps, estimates of the flow of rivers, snowmelt, or the speed of the flow and shrinkage of glaciers.

The use of satellite observation in hydrology is bound to be called on increasingly, with ever more uses combining all available measurements and data, for better management of this most vital of resources: fresh water.

Categories: AVISO Altimetry News

22 March, World Water Day: views from space

AVISO Lively Data - Wed, 2017-03-22 00:21
Fresh water, essential for all life on Earth, is present in a finite amount on our planet (only 0.007% of all the planet's water is accessible for human consumption via rivers, streams, reservoirs and lakes).

In particular, it is essential for human activities. The consumption of fresh water is growing three times faster than the population. But global water resources are shared unequally between countries and continents: Asia accounts for 60% of the world’s population but has only 36% of its water, while South America has only 7% of the population but 30% of the water.

Today, water is no longer simply a problem for "poor countries": drought is increasingly afflicting areas of China, the USA, Australia and Europe. Aquifers are drying up and pollution and salinity are reducing water reserves even further. It has become essential to introduce tools to optimise the management of these resources.

At the moment, hydrology is essentially based on probes and gauging stations installed in situ at the edges of watercourses or lakes. But these instruments are distributed very unevenly across the surface of the globe, and it is often difficult to keep them properly maintained and calibrated. Satellite-based observation helps ensure the regularity and homogeneity of measurements from all over the planet. Satellite missions have led to major advances in environmental studies, including in the management of water resources. Among other achievements, nadir altimetry can acquire the height of the water of certain lakes or rivers, and the wide-swath altimetry made possible by SWOT will soon extend this possibility to include all inland waters.

Precipitation, evaporation and evapotranspiration, water levels and surface areas, the extent of frozen regions, soil moisture, groundwater reserves, water quality, surface water temperature, depth, mapping of watersheds – all this information can be and already is being provided today by Earth observation satellites. In addition, by combining all these sources, combining some of them with in situ measurements and/or with models, synoptic maps can be compiled on the situation of a watershed, a water deficit for example, risk maps, estimates of the flow of rivers, snowmelt, or the speed of the flow and shrinkage of glaciers.

The use of satellite observation in hydrology is bound to be called on increasingly, with ever more uses combining all available measurements and data, for better management of this most vital of resources: fresh water.

Categories: AVISO Altimetry News
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