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            "description": "From space, satellites such as the NASA and USGS Landsat 8 can help scientists identify where an algal bloom has formed in lakes or rivers. It’s a complicated data analysis process, but one that researchers are automating so resource managers around the country can use the satellite data to identify potential problems.\r<br>\r<br>Nima Pahlevan and his team at NASA’s Goddard Space Flight Center have developed an algorithm to take the data collected by Landsat 8 over water, analyze it, and create a product for distribution. There are multiple, computationally intensive steps to get from the raw data to the usable product. This free-to-use data product makes it easier for more people to work with quality Landsat data.\r<br>\r<br>The Landsat Program is a series of Earth-observing satellite missions jointly managed by NASA and the U.S. Geological Survey (USGS). Landsat satellites have been consistently gathering data about our planet since 1972. They continue to improve and expand this unparalleled record of Earth's changing landscapes for the benefit of all.",
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            "title": "NASA To Launch Landsat 9: Continues Nearly 50-Year Legacy of Observing Earth from Space Live Shots",
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            "release_date": "2021-09-23T12:00:00-04:00",
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            "title": "Landsat 9 Atmospheric Correction",
            "description": "Landsat collects light in visible and infrared wavelengths. Sunlight reflects off Earth’s surface, and scientists identify the land cover based on which wavelengths are reflected strongly or weakly.But sunlight is also reflected by particles in the atmosphere, which distorts the data and can lead to what looks like a haze in the imagery. Using basic principles of physics, and knowing the meteorological conditions, scientists can determine the effects of the scattering and absorption as light passes through the atmosphere. This atmospheric correction is essential to determining exactly how much of each wavelength reflected of the features of the surface, and having quantifiable data.The videos below show different examples of atmospheric scattering which need to be accounted for when doing atmospheric correction of satellite data. In these cases, it is for observations over water. The resulting atmospheric corrections are part of the process for the new Landsat Aquatic Reflectance data product. Landsat’s highly calibrated data products, free to download and use, are making detailed Earth-observation data more accessible to users and bringing a greater benefit to society. || ",
            "release_date": "2021-03-22T11:00:00-04:00",
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            "url": "https://svs.gsfc.nasa.gov/20322/",
            "page_type": "Animation",
            "title": "Landsat Lightpath Animations",
            "description": "For nearly half a century, the Landsat mission has shaped our understanding of Earth. Since the launch of the first Landsat satellite in 1972, the mission has gathered and archived more than 8 million images of our home planet’s terrain, including crop fields and sprawling cities, forests and shrinking glaciers. These data-rich images are free and publicly available, leading to scientific discoveries and informed resource management.Landsat 9 will carry two instruments that largely replicate the instruments on Landsat 8: the Operational Land Imager 2 (OLI-2) and the Thermal Infrared Sensor 2 (TIRS-2). OLI-2 and TIRS-2 are optical sensors that detect 11 wavelengths of visible, near infrared, shortwave infrared, and thermal infrared light as it is reflected or emitted from the planet’s surface. Data from these instruments are processed and stored at the USGS Earth Resources Observation and Science (EROS) Center in Sioux Falls, South Dakota—where decades worth of data from all of the Landsat satellites are stored and made available for free to the public.The Landsat mission, a partnership between NASA and the U.S. Geological Survey (USGS), has provided the longest continuous record of Earth’s land surfaces from space. The consistency of Landsat’s land-cover data from sensor to sensor and year to year makes it possible to trace land-cover changes from 1972 to the present, and it will continue into the future with Landsat 9. With better technology than ever before, Landsat 9 will enhance and extend the data record to the 50-year mark and beyond. || ",
            "release_date": "2021-01-12T20:00:00-05:00",
            "update_date": "2023-05-03T13:44:23.608479-04:00",
            "main_image": {
                "id": 383102,
                "url": "https://svs.gsfc.nasa.gov/vis/a020000/a020300/a020322/L9_OLI_data_1080_30fps_ProRes.00406_print.jpg",
                "filename": "L9_OLI_data_1080_30fps_ProRes.00406_print.jpg",
                "media_type": "Image",
                "alt_text": "Data collection of the OLI-2 instrument aboard Landsat 9. OLI-2 will have a 98-foot (30-meter) spatial resolution across most of its spectral bands, meaning each pixel represents an area about the size of a baseball infield. Altogether, the sensors cover a swath 115 miles (185 kilometers) wide. This combination of a wide swath and moderate resolution allows OLI-2 to cover large areas, while still providing fine enough resolution to distinguish individual agricultural fields, forest plots or housing developments—important information for urban planners, land resource managers and commodity analysts.Light from the sun reflects off Earth's surface and into OLI-2's telescope. In the example in this animation, OLI-2 is colecting data south of Fort Worth, Texas, on July 17, 2020.",
                "width": 1024,
                "height": 576,
                "pixels": 589824
            }
        }
    ],
    "products": [],
    "newer_versions": [],
    "older_versions": [],
    "alternate_versions": []
}