Sentinel-6 Michael Freilich, a joint U.S.-European satellite built to measure global sea surface height, has sent back its first measurements of sea level. The data provide information on sea surface height, wave height, and wind speed off the southern tip of Africa.
“We’re excited for Sentinel-6 Michael Freilich to begin its critical work studying sea level and helping us understand the many aspects of our planet’s global ocean,” said Thomas Zurbuchen, NASA’s associate administrator for science at the agency’s headquarters in Washington. “I know Mike would be thrilled that the satellite bearing his name has begun operating, but he’d also be looking forward to studying the data from this important mission, as we all are.”Read the rest of this entry »
May 20, 2015
I have created a number of pages available that will provide you with additional information, links to news feeds, and iPad and Android Apps by NASA for a variety of missions and news.
The new pages (all pages are available when you click the three bars on the upper right hand side of the page) that have been added are:
Along with the featured apps, NASA also has numerous apps for everything from other facilities to current space exploration projects, live views of the Sun, ISS and Mars rover.
Here this page provides the news feed (RSS) links to many of NASA’s missions, centers, science and technology, general and topical feeds. You will need to copy the links into your News or an RSS App or computer programs (Microsoft Exchange suppports RSS feeds within the mail program, for example).
Each NASA center creates and updates Fact Sheets covering its mission, facilities and projects. Click on a center’s name to go its Fact Sheet index. Click on the links to veiw any fact sheet you wish to know about.
This page is the main page for all the RSS and XML feeds that other websites provide, such as Space.com. As we find more sites providing news stories related to Cosmology and Space Exploration, I will add it here.
As I gather more links together, I will update this message (which will stick to the top for at least seven days every time it changes) with the new links. For example, I am working on a Fact Sheet page that will provide links to every mission NASA has performed. It will at least have current missions, however, I am also going to add all missions going back to the beginning of the US space program.
NASA has joined forces with the U.S. Environmental Protection Agency, National Oceanic and Atmospheric Administration, and U.S. Geological Survey to transform satellite data designed to probe ocean biology into information that will help protect the American public from harmful freshwater algal blooms.
Algal blooms are a worldwide environmental problem causing human and animal health risks, fish kills, and taste and odor in drinking water. In the United States, the cost of freshwater degraded by harmful algal blooms is estimated at $64 million annually. In August 2014, officials in Toledo, Ohio, banned the use of drinking water supplied to more than 400,000 residents after it was contaminated by an algal bloom in Lake Erie.
The new $3.6 million, multi-agency effort will use ocean color satellite data to develop an early warning indicator for toxic and nuisance algal blooms in freshwater systems and an information distribution system to aid expedient public health advisories.
Ocean color satellite data from NASA’s Aqua, the USGS-NASA Landsat, and the European Space Agency’s Sentinel-2 and -3 are currently available to scientists, but are not routinely processed and produced in formats that help state and local environmental and water quality managers. Through this project, satellite data on harmful algal blooms developed by the partner agencies will be converted to a format that stakeholders can use through mobile devices and web portals.
NOAA and NASA pioneered the use of satellite data to monitor and forecast harmful algal blooms. Satellites allow for more frequent observations over broader areas than water sampling. The satellite data support NOAA’s existing forecasting systems in the Gulf of Mexico and Great Lakes.
The new network builds on previous NASA ocean satellite sensor technologies created to study the global ocean’s microscopic algal communities, which play a major role in ocean ecology, the movement of carbon dioxide between the atmosphere and ocean, and climate change. These sensors detect the color of the sunlit upper layer of the ocean and are used to create indicators that can help identify harmful algal blooms.
Under certain environmental conditions, algae naturally present in marine and fresh waters rapidly multiply to create a bloom. Some species of algae called cyanobacteria produce toxins that can kill wildlife and domestic animals and cause illness in humans through exposure to contaminated freshwater and the consumption of contaminated drinking water, fish or shellfish. Cyanobacteria blooms are a particular concern because of their dense biomass, toxins, taste and odor.
The project also includes a research component to improve understanding of the environmental causes and health impacts of cyanobacteria and phytoplankton blooms across the United States. Blooms in lakes and estuaries are produced when aquatic plants receive excess nutrients under suitable environmental conditions. Various land uses, such as urbanization and agricultural practices, change the amount of nutrients and sediment delivered in watersheds, which can influence cyanobacterial growth.
Researchers will compare the new freshwater algal blooms data with satellite records of land cover changes over time to identify specific land-use activities that may have caused environmental changes linked to the frequency and intensity of blooms. The results will help to develop better forecasts of bloom events.
NASA uses the vantage point of space to increase our understanding of our home planet, improve lives, and safeguard our future. NASA develops new ways to observe and study Earth’s interconnected natural systems with long-term satellite data records. The agency freely shares this unique knowledge and works with institutions around the world to gain new insights into how our planet is changing.
For more information on NASA’s Earth science activities, visit: http://www.nasa.gov/earth