Jump to content

NASA Tech Breathes Life Into Potentially Game-Changing Antenna Design


NASA

Recommended Posts

  • Publishers

4 min read

NASA Tech Breathes Life Into Potentially Game-Changing Antenna Design

Freefall in space above the Earth.

Some 30 years ago, a young engineer named Christopher Walker was home in the evening making chocolate pudding when he got what turned out to be a very serendipitous call from his mother.

Taking the call, he shut off the stove and stretched plastic wrap over the pot to keep the pudding fresh. By the time he returned, the cooling air in the pot had drawn the wrap into a concave shape, and in that warped plastic, he saw something – the magnified reflection of an overhead lightbulb – that gave him an idea that could revolutionize space-based sensing and communications.

That idea became the Large Balloon Reflector (LBR), an inflatable device that creates wide collection apertures that weigh a fraction of today’s deployable antennas. Now, with an assist from NASA’s Innovative Advanced Concepts (NIAC) program, funded by the agency’s Space Technology Mission Directorate, which supports visionary innovations from diverse sources, Walker’s decades-old vision is coming to fruition.

The concept turns part of the inside surface of an inflated sphere into a parabolic antenna. A section comprising about a third of the balloon’s interior surface is aluminized, giving it reflective properties.

With NIAC funding, and a grant from the U.S. Naval Research Laboratory, Walker was able to develop and demonstrate technologies for a 33-foot-diameter (10 meters) LBR that was carried to the stratosphere by a giant balloon. For comparison, the aperture of NASA’s massive James Webb Space Telescope is over 21 feet (6.5 meters) in diameter.

“There was no place other than NIAC within NASA to get this off the ground,” says Walker, now a astronomy and optical engineering professor at the University of Arizona in Tucson. “At first, I was afraid to share the idea with colleagues because it sounded so crazy. You need a program within NASA that will actually look at the radical ideas, and NIAC is it.”

Parabolic dish antennas use their concave shape to capture and concentrate electromagnetic radiation. The larger the antenna’s diameter, or aperture, the more effective it is for capturing light or radio waves and transmitting radio signals over great distances.

In astronomy, there is a tremendous advantage to placing telescopes above the Earth’s atmosphere, which tends to distort or degrade signals coming from space. The challenge is that traditional large reflector antennas are heavy, unwieldy, and difficult to stow, leading to launch constraints and risky in-space deployment schemes.

The LBR design solves both problems. Made of a thin film structure, it inflates like a beachball, providing a stable parabolic-dish shape without the need for bulky and complex deployable hardware, and can fold into a tiny volume.  

In 2018, Freefall Aerospace, a company co-founded by Walker to develop and market the technology, demonstrated the LBR’s potential aboard NASA’s stadium-sized stratospheric balloon, which carried a 3.28-foot scale model to an altitude of 159,000 feet.

Next up for the technology is a high-speed communications demonstration in low Earth orbit aboard a 6-unit CubeSat, about the size of a shoebox, called CatSat. It was selected for flight in 2019 as part of NASA’s CubeSat Launch Initiative. It is a joint effort involving NASA, Freefall Aerospace, the University of Arizona, and Rincon Research Corporation in Tucson, Arizona.

After reaching low-Earth orbit, CatSat’s inflatable antenna deployment system will deploy from its container, inflate to a diameter of about one-and-a-half feet, and begin transmitting back high-definition Earth photos. The mission is slated for launch with several other CubeSats on Firefly Aerospace’s Alpha rocket as part of the Educational Launch of Nanosatellites (ELaNa) 43 mission.

A more ambitious lunar mission concept is also being explored. NASA’s Goddard Space Flight Center in Greenbelt, Maryland, would use the inflatable antenna in tandem with a new instrument called Terahertz Spectrometer for In-Situ Resource Utilization, a miniature, high-power laser precisely calibrated to detect water, a critical exploration resource.

“The technology demonstrated by CatSat opens the door to the possibility of future lunar, planetary and deep-space missions using CubeSats,” said Walker.

It might be difficult to believe this all started because a young engineer’s idea of dinner one evening was what most would consider dessert. Then again, one could say the proof was in the pudding.

Share

Details

Last Updated
Oct 26, 2023
Editor
Loura Hall
Contact

View the full article

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Similar Topics

    • By NASA
      El viceministro de Políticas para la Defensa del Ministerio de Defensa de Perú, César Medardo Torres Vega, el administrador de la NASA, Bill Nelson, y el director de la Comisión Nacional de Investigación y Desarrollo Aeroespacial del Perú (CONIDA), mayor general Roberto Melgar Sheen, se reúnen en Lima, Perú, el 14 de noviembre de 2024, donde EE. UU. y Perú firmaron un memorando de entendimiento acordando estudiar una potencial campaña de cohetes sonda.Crédito: Embajada de EE. UU. en Perú Read this release in English here.
      La NASA y la Comisión Nacional de Investigación y Desarrollo Aeroespacial del Perú (CONIDA) sentaron las bases para una posible campaña de varios años de duración para el lanzamiento de pequeños cohetes científicos desde Perú, conjuntamente con Estados Unidos.
      Ambos países firmaron el jueves un memorando de entendimiento no vinculante que incluye capacitación en seguridad, un estudio de factibilidad conjunto para la posible campaña, y asistencia técnica para CONIDA en lanzamientos de cohetes sonda. Los cohetes sonda son pequeños cohetes de bajo costo que proporcionan acceso suborbital al espacio.
      “Estamos entusiasmados de analizar la posibilidad de lanzar nuevamente cohetes sonda desde Perú”, dijo el administrador de la NASA, Bill Nelson, quien firmó en nombre de Estados Unidos. “Este acuerdo profundiza nuestra colaboración internacional con Perú y la investigación científica que llevamos a cabo debido a la ubicación del país en el ecuador magnético. Juntos iremos más lejos”.
      El mayor general Roberto Melgar Sheen, jefe institucional de CONIDA, firmó en nombre de Perú. Brian Nichols, subsecretario de Asuntos del Hemisferio Occidental del Departamento de Estado de EE. UU., y Stephanie Syptak-Ramnath, embajadora de EE. UU. en Perú, también participaron, entre otros funcionarios peruanos. El evento tuvo lugar durante la semana del Foro de Cooperación Económica Asia-Pacífico que comenzó el 9 de noviembre en Lima.
      Durante su visita a Perú, Nelson también discutió la importancia de las asociaciones y la colaboración internacionales en el espacio y celebró la firma de los Acuerdos Artemis por parte de Perú a principios de este año.
      Estados Unidos y Perú tienen una larga historia de cooperación espacial. La NASA llevó a cabo campañas de cohetes sonda en la base de lanzamiento Punta Lobos de CONIDA en 1975 y 1983.
      La NASA utiliza cohetes sonda para transportar instrumentos científicos al espacio en vuelos suborbitales para recopilar importantes datos científicos y poner a prueba prototipos de instrumentos. Con ellos se obtienen datos de incalculable valor que mejoran nuestra comprensión de la atmósfera y el clima de la Tierra, nuestro sistema solar y el universo, y se ponen a prueba equipamientos para viajes espaciales más profundos.
      Comprender la atmósfera de la Tierra y cómo es influenciada por el Sol es crucial para proteger los recursos terrestres y espaciales de los que dependemos todos los días, desde la red eléctrica hasta los datos meteorológicos e incluso la navegación.
      Para obtener más información sobre las asociaciones internacionales de la NASA (en inglés), visita:
      https://www.nasa.gov/oiir
      -fin-
      Meira Bernstein / Elizabeth Shaw
      Headquarters, Washington
      202-358-1600
      meira.b.bernstein@nasa.gov / elizabeth.a.shaw@nasa.gov
      Share
      Details
      Last Updated Nov 14, 2024 EditorJessica TaveauLocationNASA Headquarters Related Terms
      Office of International and Interagency Relations (OIIR) Artemis Accords Sounding Rockets View the full article
    • By NASA
      Credit: NASA NASA, on behalf of the National Oceanic and Atmospheric Administration (NOAA), has selected Southwest Research Institute of San Antonio to build three coronagraphs for the Lagrange 1 Series project, part of NOAA’s Space Weather Next program.
      Once operational, the coronagraphs will provide critical data to NOAA’s Space Weather Prediction Center, which issues forecasts, warnings, and alerts that help mitigate space weather impacts, including electric power outages and interruption to communications and navigation systems.
      This cost-plus-fixed-fee contract is valued at approximately $60 million, and the anticipated period of performance is from this November through January 2034, concluding after launch of the second coronagraph aboard a NOAA spacecraft. The third coronagraph will be delivered as a flight spare.
      This contract award marks a transfer of coronagraph development from the government to the U.S. commercial sector. The contract scope includes design, analysis, development, fabrication, integration, test, verification, and evaluation of the      coronagraphs; launch support; supply and maintenance of ground support equipment; and support of post-launch instrument operations at the NOAA Satellite Operations Facility. The work will take place at Southwest Research Institute’s facility in San Antonio.
      The coronagraphs will observe the density structure of the Sun’s faint outermost atmosphere — the corona — and will detect Earth-directed coronal mass ejections shortly after they erupt, providing the longest possible lead time for geomagnetic storm watches. With this forewarning, public and private organizations affected by space weather can take actions to protect their assets. The coronagraphs will also provide data continuity from the Space Weather follow-on Lagrange 1 mission.
      NASA and NOAA oversee the development, launch, testing and operation of all the satellites in the project. NOAA is the program owner providing the requirements and funding along with managing the program, operations, data products, and dissemination to users. NASA and its commercial partners develop and build the instruments, spacecraft, and provide launch services on behalf of NOAA.
      For information about NASA and agency programs, visit:
      https://www.nasa.gov
      -end-
      Abbey Donaldson
      Headquarters, Washington
      202-358-1600
      Abbey.a.donaldson@nasa.gov
      Jeremy Eggers
      Goddard Space Flight Center, Greenbelt, Md.
      757-824-2958
      jeremy.l.eggers@nasa.gov
      View the full article
    • By NASA
      Peru’s Vice Minister of Defense Policies for Ministry of Defense César Medardo Torres Vega, NASA Administrator Bill Nelson, and Director of Peru’s National Commission for Aerospace Research and Development (CONIDA) Maj. Gen. Roberto Melgar Sheen meet in Lima, Peru, Nov. 14, 2024, where the U.S. and Peru signed a memorandum of understanding agreeing to study a potential sounding rocket campaign.Credit: U.S. Embassy Peru NASA and Peru’s National Commission for Aerospace Research and Development (CONIDA) laid the groundwork for a potential multi-year scientific rocket launch campaign in the South American country.
      Both countries signed a non-binding memorandum of understanding Thursday that includes safety training, a joint feasibility study for the potential campaign, and technical assistance for CONIDA on sounding rocket launches. Sounding rockets are small, low-cost rockets that provide suborbital access to space.
      “We are excited to look at the possibility of once again launching sounding rockets from Peru,” said NASA Administrator Bill Nelson, who signed on behalf of the United States. “This agreement deepens our international partnership with Peru and the scientific research we conduct because of the country’s location along the magnetic equator. Together we will go farther.” 
      Maj. Gen. Roberto Melgar Sheen, head of CONIDA, signed on behalf of Peru. Brian Nichols, assistant secretary for Western Hemisphere Affairs for the U.S. State Department, and Stephanie Syptak-Ramnath, U.S. ambassador to Peru, also participated, among other Peruvian officials. The event took place during the week of the Asia-Pacific Economic Cooperation forum beginning Nov. 9 in Lima.
      During his visit to Peru, Nelson also discussed the importance of international partnerships and collaboration in space and celebrated Peru’s signing of the Artemis Accords earlier this year.
      The United States and Peru have a long history of space cooperation. NASA conducted sounding rocket campaigns at CONIDA’s Punta Lobos launch base in 1975 and 1983.
      NASA uses sounding rockets to carry scientific instruments into space on suborbital flights to collect important science data and test prototype instruments. They yield invaluable data that enhance our understanding of Earth’s atmosphere and weather, our solar system, and the universe, and test equipment for deeper space travel.
      Understanding our Earth’s atmosphere and how it is influenced by the Sun is crucial to protecting ground and space-based assets that we rely on every day, from the power grid to weather data and even navigation. 
      For more information about NASA’s international partnerships, visit:
      https://www.nasa.gov/oiir
      -end-
      Meira Bernstein / Elizabeth Shaw
      Headquarters, Washington
      202-358-1600
      meira.b.bernstein@nasa.gov / elizabeth.a.shaw@nasa.gov
      Share
      Details
      Last Updated Nov 14, 2024 EditorJessica TaveauLocationNASA Headquarters Related Terms
      Office of International and Interagency Relations (OIIR) Sounding Rockets View the full article
    • By NASA
      In the unforgiving lunar environment, the possibility of an astronaut crewmember becoming incapacitated due to unforeseen circumstances (injury, medical emergency, or a mission-related accident) is a critical concern, starting with the upcoming Artemis III mission, where two astronaut crewmembers will explore the Lunar South Pole. The Moon’s surface is littered with rocks ranging from 0.15 to 20 meters in diameter and craters spanning 1 to 30 meters wide, making navigation challenging even under optimal conditions. The low gravity, unique lighting conditions, extreme temperatures, and availability of only one person to perform the rescue, further complicate any rescue efforts. Among the critical concerns is the safety of astronauts during Extravehicular Activities (EVAs). If an astronaut crewmember becomes incapacitated during a mission, the ability to return them safely and promptly to the human landing system is essential. A single crew member should be able to transport an incapacitated crew member distances up to 2 km and a slope of up to 20 degrees on the lunar terrain without the assistance of a lunar rover. This pressing issue opens the door for innovative solutions. We are looking for a cutting-edge design that is low in mass and easy to deploy, enabling one astronaut crewmember to safely transport their suited (343 kg (~755lb)) and fully incapacitated partner back to the human landing system. The solution must perform effectively in the Moon’s extreme South Pole environment and operate independently of a lunar rover. Your creativity and expertise could bridge this critical gap, enhancing the safety measures for future lunar explorers. By addressing this challenge, you have the opportunity to contribute to the next “giant leap” in human space exploration.
      Award: $45,000 in total prizes
      Open Date: November 14, 2024
      Close Date: January 23, 2025
      For more information, visit: https://www.herox.com/NASASouthPoleSafety
      View the full article
    • By NASA
      5 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      NASA’s EMIT collected this hyperspectral image of the Amazon River in northern Brazil on June 30 as part of an effort to map global ecosystem biodiversity. The instrument was originally tasked with mapping minerals over deserts; its data is now being used in research on a diverse range of topics. NASA/JPL-Caltech The imaging spectrometer measures the colors of light reflected from Earth’s surface to study fields such as agriculture, hydrology, and climate science.
      Observing our planet from the International Space Station since July 2022, NASA’s EMIT (Earth Surface Mineral Dust Source Investigation) mission is beginning its next act.
      At first the imaging spectrometer was solely aimed at mapping minerals over Earth’s desert regions to help determine the cooling and heating effects that dust can have on regional and global climate. The instrument soon added another skill: pinpointing greenhouse gas emission sources, including landfills and fossil fuel infrastructure.
      Following a mission extension this year, EMIT is now collecting data from regions beyond deserts, addressing topics as varied as agriculture, hydrology, and climate science.
      Imaging spectrometers like EMIT detect the light reflected from Earth, and they separate visible and infrared light into hundreds of wavelength bands — colors, essentially. Scientists use patterns of reflection and absorption at different wavelengths to determine the composition of what the instrument is observing. The approach echoes Isaac Newton’s prism experiments in 1672, in which the physicist discovered that visible light is composed of a rainbow of colors.
      Perched on the International Space Station, NASA’s EMIT can differentiate between types of vegetation to help researchers understand the distribution and traits of plant communities. The instrument collected this data over the mid-Atlantic U.S. on April 23.NASA/JPL-Caltech “Breakthroughs in optics, physics, and chemistry led to where we are today with this incredible instrument, providing data to help address pressing questions on our planet,” said Dana Chadwick, EMIT’s applications lead at NASA’s Jet Propulsion Laboratory in Southern California. 
      New Science Projects
      In its extended mission, EMIT’s data will be the focus of 16 new projects under NASA’s Research Opportunities in Space and Earth Science (ROSES) program, which funds science investigations at universities, research institutions, and NASA.
      For example, the U.S. Geological Survey (USGS) and the U.S. Department of Agriculture’s (USDA) Agricultural Research Service are exploring how EMIT can assess climate-smart agricultural practices. Those practices — winter cover crops and conservation tillage — involve protecting cropland during non-growing seasons with either living plants or dead plant matter to prevent erosion and manage nitrogen.
      Imaging spectrometers are capable of gathering data on the distribution and characteristics of plants and plant matter, based on the patterns of light they reflect. The information can help agricultural agencies incentivize farmers to use sustainable practices and potentially help farmers manage their fields. 
      “We’re adding more accuracy and reducing error on the measurements we are supplying to end users,” said Jyoti Jennewein, an Agricultural Research Service research physical scientist based in Fort Collins, Colorado, and a project co-lead.
      The USGS-USDA project is also informing analytical approaches for NASA’s future Surface Biology and Geology-Visible Shortwave Infrared mission. The satellite will cover Earth’s land and coasts more frequently than EMIT, with finer spatial resolution.
      Looking at Snowmelt
      Another new project will test whether EMIT data can help refine estimates of snowpack melting rates. Such an improvement could inform water management in states like California, where meltwater makes up the majority of the agricultural water supply.
      Imaging spectrometers like EMIT measure the albedo of snow — the percentage of solar radiation it’s reflecting. What isn’t reflected is absorbed, so the observations indicate how much energy snow is taking in, which in turn helps with estimates of snow melt rates. The instruments also discern what’s affecting albedo: snow-grain size, dust or soot contamination, or both.
      For this work, EMIT’s ability to measure beyond visible light is key. Ice is “pretty absorptive at near-infrared and the shortwave infrared wavelengths,” said Jeff Dozier, a University of California, Santa Barbara professor emeritus and the project’s principal investigator.
      Other ROSES-funded projects focus on wildflower blooming, phytoplankton and carbon dynamics in inland waters, ecosystem biodiversity, and functional traits of forests.
      Dust Impacts
      Researchers with EMIT will continue to study the climate effects of dust. When lofted into the air by windstorms, darker, iron-filled dust absorbs the Sun’s heat and warms the surrounding air, while lighter-colored, clay-rich particles do the opposite. Scientists have been uncertain whether airborne dust has overall cooling or warming effects on the planet. Before EMIT, they could only assume the color of particles in a region.
      The EMIT mission is “giving us lab-quality results, everywhere we need to know,” said Natalie Mahowald, the mission’s deputy principal investigator and an Earth system scientist at Cornell University in Ithaca, New York. Feeding the data into Earth system computer models, Mahowald expects to get closer to pinpointing dust’s climate impact as Earth warms.
      Greenhouse Gas Detection
      The mission will continue to identify point-source emissions of methane and carbon dioxide, the greenhouse gases most responsible for climate change, and observations are available through EMIT’s data portal and the U.S. Greenhouse Gas Center.
      The EMIT team is also refining the software that identifies and measures greenhouse-gas plumes in the data, and they’re working to streamline the process with machine-learning automation. Aligning with NASA’s open science initiative, they are sharing code with public, private, and nonprofit organizations doing similar work.
      “Making this work publicly accessible has fundamentally pushed the science of measuring point-source emissions forward and expanded the use of EMIT data,” said Andrew Thorpe, the JPL research technologist heading the EMIT greenhouse gas effort.
      More About EMIT
      The EMIT instrument was developed by NASA’s Jet Propulsion Laboratory, which is managed for the agency by Caltech in Pasadena, California. Launched to the International Space Station in July 2022, EMIT is on an extended three-year mission in which it’s supporting a range of research projects. EMIT’s data products are available at the NASA Land Processes Distributed Active Archive Center for use by other researchers and the public.
      To learn more about the mission, visit:
      https://earth.jpl.nasa.gov/emit/
      How the new NISAR satellite will track Earth’s changing surface A planet-rumbling Greenland tsunami seen from above News Media Contacts
      Andrew Wang / Jane J. Lee
      Jet Propulsion Laboratory, Pasadena, Calif.
      626-379-6874 / 818-354-0307
      andrew.wang@jpl.nasa.gov / jane.j.lee@jpl.nasa.gov
      2024-159
      Share
      Details
      Last Updated Nov 14, 2024 Related Terms
      EMIT (Earth Surface Mineral Dust Source Investigation) Earth Earth Science Earth Science Division Jet Propulsion Laboratory Explore More
      4 min read NASA and Forest Service Use Balloon to Help Firefighters Communicate
      Article 12 mins ago 9 min read The Earth Observer Editor’s Corner: Fall 2024
      On September 18, 2024, the National Oceanic and Atmospheric Administration (NOAA) shared the first images…
      Article 35 mins ago 3 min read Summary of Aura 20th Anniversary Event
      Snippets from The Earth Observer’s Editor’s Corner The last of NASA’s three EOS Flagships –…
      Article 37 mins ago Keep Exploring Discover Related Topics
      Missions
      Humans in Space
      Climate Change
      Solar System
      View the full article
  • Check out these Videos

×
×
  • Create New...