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By European Space Agency
The second of the Meteosat Third Generation (MTG) satellites and the first instrument for the Copernicus Sentinel-4 mission lifted off at 23:04 CEST on Tuesday, 1 July. The satellite is now on its way to monitor Earth’s atmosphere from an altitude of 36 000 km. From this geostationary orbit, the missions can provide game-changing data for forecasting severe storms and air pollution over Europe.
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
NASA employee Naomi Torres sits inside the air taxi passenger ride quality simulator at NASA’s Armstrong Flight Research Center in Edwards, California, as the simulator moves during a study on Oct. 23, 2024. Research continues to better understand how humans may interact with these new types of aircraft.NASA/Steve Freeman NASA’s Advanced Air Mobility vision involves the skies above the U.S. filled with new types of aircraft, including air taxis. But making that vision a reality involves ensuring that people will actually want to ride these aircraft – which is why NASA has been working to evaluate comfort, to see what passengers will and won’t tolerate.
NASA is conducting a series of studies to understand how air taxi motion, vibration, and other factors affect ride comfort. The agency will provide the data it gathers to industry and others to guide the design and operational practices for future air taxis.
“The results of this study can guide air taxi companies to design aircraft that take off, land, and respond to winds and gusts in a way that is comfortable for the passengers,” said Curt Hanson, senior flight controls researcher for this project based at NASA’s Armstrong Flight Research Center in Edwards, California. “Passengers who enjoy their experience in an air taxi are more likely to become repeat riders, which will help the industry grow.”
The air taxi comfort research team uses NASA Armstrong’s Ride Quality Laboratory as well as the Human Vibration Lab and Vertical Motion Simulator at NASA’s Ames Research Center in California’s Silicon Valley to study passenger response to ride quality, as well as how easily and precisely a pilot can control and maneuver aircraft.
After pilots checked out the simulator setup, the research team conducted a study in October where NASA employees volunteered to participate as passengers to experience the virtual air taxi flights and then describe their comfort level to the researchers.
Curt Hanson, senior flight controls researcher for the Revolutionary Vertical Lift Technology project based at NASA’s Armstrong Flight Research Center in Edwards, California, explains the study about to begin to NASA employee and test subject Naomi Torres on Oct. 23, 2024. Behind them is the air taxi passenger ride quality simulator in NASA Armstrong’s Ride Quality Laboratory. Studies continue to better understand passenger comfort for future air taxi rides.NASA/Steve Freeman Using this testing, the team produced an initial study that found a relationship between levels of sudden vertical motion and passenger discomfort. More data collection is needed to understand the combined effect of motion, vibration, and other factors on passenger comfort.
“In the Vertical Motion Simulator, we can investigate how technology and aircraft design choices affect the handling qualities of the aircraft, generate data as pilots maneuver the air taxi models under realistic conditions, and then use this to further investigate passenger comfort in the Ride Quality and Human Vibration Labs,” said Carlos Malpica, senior rotorcraft flight dynamics researcher for this effort based at NASA Ames.
This work is managed by the Revolutionary Vertical Lift Technology project under NASA’s Advanced Air Vehicles Program in support of NASA’s Advanced Air Mobility mission, which seeks to deliver data to guide the industry’s development of electric air taxis and drones.
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Last Updated Jun 20, 2025 EditorDede DiniusContactTeresa Whitingteresa.whiting@nasa.govLocationArmstrong Flight Research Center Related Terms
Armstrong Flight Research Center Advanced Air Mobility Advanced Air Vehicles Program Aeronautics Ames Research Center Drones & You Revolutionary Vertical Lift Technology Explore More
2 min read NASA Aircraft to Make Low-Altitude Flights in Mid-Atlantic, California
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By NASA
For the first time, scientists can observe temperature changes in the Sun’s outer atmosphere thanks to new technology introduced by NASA’s CODEX instrument. This animated, color-coded heat map shows temperature changes over the course of a couple days, where red indicates hotter regions and purple indicates cooler ones. NASA/KASI/INAF/CODEX Key Points:
NASA’s CODEX investigation captured images of the Sun’s outer atmosphere, the corona, showcasing new aspects of its gusty, uneven flow. The CODEX instrument, located on the International Space Station, is a coronagraph — a scientific tool that creates an artificial eclipse with physical disks — that measures the speed and temperature of solar wind using special filters. These first-of-their-kind measurements will help scientists improve models of space weather and better understand the Sun’s impact on Earth. Scientists analyzing data from NASA’s CODEX (Coronal Diagnostic Experiment) investigation have successfully evaluated the instrument’s first images, revealing the speed and temperature of material flowing out from the Sun. These images, shared at a press event Tuesday at the American Astronomical Society meeting in Anchorage, Alaska, illustrate the Sun’s outer atmosphere, or corona, is not a homogenous, steady flow of material, but an area with sputtering gusts of hot plasma. These images will help scientists improve their understanding of how the Sun impacts Earth and our technology in space.
“We really never had the ability to do this kind of science before,” said Jeffrey Newmark, a heliophysicist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland, and the principal investigator for CODEX. “The right kind of filters, the right size instrumentation — all the right things fell into place. These are brand new observations that have never been seen before, and we think there’s a lot of really interesting science to be done with it.”
The Sun continuously radiates material in the form of the solar wind. The Sun’s magnetic field shapes this material, sometimes creating flowing, ray-like formations called coronal streamers. In this view from NASA’s CODEX instrument, large dark spots block much of the bright light from the Sun. Blocking this light allows the instrument’s sensitive equipment to capture the faint light of the Sun’s outer atmosphere. NASA/KASI/INAF/CODEX NASA’s CODEX is a solar coronagraph, an instrument often employed to study the Sun’s faint corona, or outer atmosphere, by blocking the bright face of the Sun. The instrument, which is installed on the International Space Station, creates artificial eclipses using a series of circular pieces of material called occulting disks at the end of a long telescope-like tube. The occulting disks are about the size of a tennis ball and are held in place by three metal arms.
Scientists often use coronagraphs to study visible light from the corona, revealing dynamic features, such as solar storms, that shape the weather in space, potentially impacting Earth and beyond.
NASA missions use coronagraphs to study the Sun in various ways, but that doesn’t mean they all see the same thing. Coronagraphs on the joint NASA-ESA Solar and Heliospheric Observatory (SOHO) mission look at visible light from the solar corona with both a wide field of view and a smaller one. The CODEX instrument’s field of view is somewhere in the middle, but looks at blue light to understand temperature and speed variations in the background solar wind.
In this composite image of overlapping solar observations, the center and left panels show the field-of-view coverage of the different coronagraphs with overlays and are labeled with observation ranges in solar radii. The third panel shows a zoomed-in, color-coded portion of the larger CODEX image. It highlights the temperature ratios in that portion of the solar corona using CODEX 405.0 and 393.5 nm filters. NASA/ESA/SOHO/KASI/INAF/CODEX “The CODEX instrument is doing something new,” said Newmark. “Previous coronagraph experiments have measured the density of material in the corona, but CODEX is measuring the temperature and speed of material in the slowly varying solar wind flowing out from the Sun.”
These new measurements allow scientists to better characterize the energy at the source of the solar wind.
The CODEX instrument uses four narrow-band filters — two for temperature and two for speed — to capture solar wind data. “By comparing the brightness of the images in each of these filters, we can tell the temperature and speed of the coronal solar wind,” said Newmark.
Understanding the speed and temperature of the solar wind helps scientists build a more accurate picture of the Sun, which is necessary for modeling and predicting the Sun’s behaviors.
“The CODEX instrument will impact space weather modeling by providing constraints for modelers to use in the future,” said Newmark. “We’re excited for what’s to come.”
by NASA Science Editorial Team
NASA’s Goddard Space Flight Center, Greenbelt, Md
CODEX is a collaboration between NASA Goddard Space Flight Center and the Korea Astronomy and Space Science Institute (KASI) with additional contribution from Italy’s National Institute for Astrophysics (INAF).
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Last Updated Jun 10, 2025 Related Terms
Heliophysics Coronagraph Coronal Diagnostic Experiment (CODEX) Goddard Space Flight Center Heliophysics Division Space Weather The Sun The Sun & Solar Physics View the full article
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By NASA
3 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Artist concept highlighting the novel approach proposed by the 2025 NIAC awarded selection of MaRS ICICLE concept.NASA/Aaswath Pattabhi Raman Aaswath Pattabhi Raman
University of California, Los Angeles
Exploration of Mars has captivated the public in recent decades with high-profile robotic missions and the images they have acquired seeding our collective imagination. NASA is actively planning for human exploration of Mars and laid out some of the key capabilities that must be developed to execute successful, cost-effective programs that would put human beings on the surface of another planet and bring them home safely. Efficient, flexible and productive round-trip missions will be key to further human exploration of Mars. New round-trip mission concepts however need substantially improved long-duration storage of cryogenic propellants in various space environments; relevant propellants include liquid Hydrogen (LH2) for high specific impulse Nuclear Thermal Propulsion (NTP) which can be deployed in strategic locations in advance of a mission. If enabled, such LH2 storage tanks could be used to refill a crewed Mars Transfer Vehicle (MTV) to send and bring astronauts home quickly, safely, and cost-effectively. A well-designed cryogenic propellant storage tank can reflect the vast majority of photons incident on the spacecraft, but not all. In thermal environments like Low Earth Orbit (LEO), there is residual heating due to light directly from the Sun, sunlight reflected off Earth, and blackbody thermal radiation from Earth. Over time, this leads to some of the propellant molecules absorbing the requisite latent heat of vaporization, entering the gas phase, and ultimately being released into space to prevent an unsustainable build-up of pressure in the tank. This slow “boil-off” process leads to significant losses of the cryogenic liquid into space, potentially leaving it with insufficient mass and greatly limiting Mars missions. We propose a breakthrough mission concept: an ultra-efficient round-trip Mars mission with zero boil off of propellants. This will be enabled by low-cost, efficient cryogenic liquid storage capable of storing LH2 and LOx with ZBO even in the severe and fluctuating thermal environment of LEO. To enable this capability, the propellant tanks in our mission will employs thin, lightweight, all-solid-state panels attached to the tank’s deep-space-facing surfaces that utilize a long-understood but as-yet-unrealized cooling technology known as Electro-Luminescent Cooling (ELC) to reject heat from cold solid surfaces as non-equilibrium thermal radiation with significantly more power density than Planck’s Law permits for equilibrium thermal radiation. Such a propellant tank would drastically lower the cost and complexity of propulsion systems for crewed Mars missions and other deep space exploration by allowing spacecraft to refill propellant tanks after reaching orbit rather than launching on the much larger rocket required to lift the spacecraft in a single-use stage. To achieve ZBO, a storage spacecraft must keep the storage tank’s temperature below the boiling point of the cryogen (e.g., < 90 K for LOx and < 20 K for liquid H2). Achieving this in LEO-like thermal environments requires both excellent reflectivity toward sunlight and thermal radiation from the Earth, Mars and other nearby bodies as well as a power-efficient cooling mechanism to remove what little heat inevitably does leak in, a pair of conditions ideally suited to the ELC cooling systems that will makes our full return-trip mission to Mars a success.
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Last Updated May 27, 2025 EditorLoura Hall Related Terms
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By NASA
Image data: NASA/JPL-Caltech/SwRI/MSSS; Image processing: Jackie Branc (CC BY) JunoCam, the visible light imager aboard NASA’s Juno spacecraft, captured this view of Jupiter’s northern high latitudes during the spacecraft’s 69th flyby of the giant planet on Jan. 28, 2025. Jupiter’s belts and zones stand out in this enhanced color rendition, along with the turbulence along their edges caused by winds going in different directions.
The original JunoCam data used to produce this view was taken from an altitude of about 36,000 miles (58,000 kilometers) above Jupiter’s cloud tops. JunoCam’s raw images are available for the public to peruse and process into image products. Citizen scientist Jackie Branc processed the image.
Since Juno arrived at Jupiter in 2016, it has been probing beneath the dense, forbidding clouds encircling the giant planet – the first orbiter to peer so closely. It seeks answers to questions about the origin and evolution of Jupiter, our solar system, and giant planets across the cosmos.
Learn more about NASA citizen science.
Image credit: Image data: NASA/JPL-Caltech/SwRI/MSSS; Image processing: Jackie Branc (CC BY)
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