OrbitalHub

Wikipedia dicit:

The Stratospheric Aerosol and Gas Experiment (SAGE) is a series of remote sensing satellite instruments used to study the chemical composition of Earth’s atmosphere. Specifically, SAGE has been used to study the Earth’s ozone layer and aerosols at the troposphere through the stratosphere. The SAGE instruments use solar occultation measurement technique to determine chemical concentrations in the atmosphere. Solar occultation measurement technique measures sunlight through the atmosphere and ratios that measurement with a sunlight measurement without atmospheric attenuation. This is achieved by observing sunrises and sunsets during a satellite orbit. Physically, the SAGE instruments measure ultraviolet/visible energy and this is converted via algorithms to determine chemical concentrations. SAGE data has been used to study the atmospheres aerosols, ozone, water vapor, and other trace gases.

Video credit: NASA Langley Research Center

NASA dicit:

The Sentinel-6 Michael Freilich satellite, carried atop a SpaceX Falcon 9 rocket, lifts off from Space Launch Complex 4 at Vandenberg Air Force Base in California on November 21, 2020. Launch occurred at 9:17 a.m. PST (12:17 p.m. EST). The mission is an international collaboration between NASA and several partners, and it will collect the most accurate data yet on global sea level and how our oceans are rising in response to climate change. NASA’s Launch Services Program based at Kennedy Space Center was responsible for launch management.

Video credit: NASA’s Kennedy Space Center

NASA dicit:

A cold and stable Antarctic vortex supported the development of the 12th-largest ozone hole on record in 2020. The hole reached its peak extent on September 20 at 24.8 million square kilometers.

Video credit: NASA’s Goddard Space Flight Center/Scientific Visualization Studio/Kathleen Gaeta (GSFC Interns): Lead Producer/Eric Nash (SSAI): Visualizer/Kathryn Mersmann (USRA): Graphics/Paul Newman (NASA/GSFC): Scientist/Susan Strahan (USRA): Scientist

NASA dicit:

Cameras outside the International Space Station captured dramatic views of Hurricane Zeta at 12:50 p.m. Eastern time Wednesday October 28, 2020 as the storm churned 200 miles south-southwest of New Orleans packing winds of 90 miles an hour.

Zeta is expected to make landfall near New Orleans later in the day Wednesday October 28 as a Category 2 hurricane before accelerating to the northeast.

Video credit: NASA

NASA dicit:

As it moved inland heading north over western Louisiana, Laura was overflown by the NASA / JAXA GPM Core Observatory satellite on Wednesday August 26th, shortly before the storm made landfall, then again on Thursday August 27th, about 7 hours after making landfall, as shown in the animation above.

Video credit: NASA

NASA dicit:

Landsat 9 is the latest satellite to continue the legacy of global observations of Earth’s land surface. With unmatched longevity, accuracy, and coverage, the Landsat program has been the cornerstone of global land imaging since 1972. Landsat 9 continues this tradition, and will carry us into the next 50 years of Earth observations. The two instruments aboard will make the most advanced measurements of any Landsat satellite.

Design and construction of the spacecraft and its instruments is managed by NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and operation and archiving of the data is managed by the U.S. Geological Survey. Goddard and Ball Aerospace each built one of the instruments, and the spacecraft was built by Northrop Grumman.

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.

Video credit: NASA’s Goddard Space Flight Center/Matthew R. Radcliff (USRA): Lead Producer/Aaron E. Lepsch (ADNET): Technical Support/Matthew R. Radcliff (USRA): Editor/Matthew R. Radcliff (USRA): Narrator/Kate Ramsayer: Writer/Jeffrey Masek (NASA/GSFC): Scientist/Music Marble Place by Matias Suescun [SACEM], published by KTSA Publishing [SACEM], available from Universal Production Music