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NASA’s Educational CubeSats: Small Satellites, Big Impact


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daili-deployment-1.jpg?w=893
The CubeSats from NASA’s ELaNa 38 mission were deployed from the International Space Station on Jan. 26, 2022. Seen here is the deployment of The Aerospace Corporation’s Daily Atmospheric and Ionospheric Limb Imager (DAILI).
NASA

Despite their small size, the satellites launching through NASA’s CubeSat Launch Initiative (CSLI) missions have a big impact, creating access to space for many who might not otherwise have the opportunity. One recent mission tells the story of four teams of researchers and engineers who conceived, built, launched, and collected data from these shoebox-sized satellites, helping them answer a host of questions about our planet and the universe.

The teams’ CubeSats launched as part of the ELaNa 38 (Educational Launch of Nanosatellites) mission, selected by CSLI and assigned to the mission by NASA’s Launch Services Program. A little more than a month after launching aboard SpaceX’s 24th commercial resupply services mission from NASA’s Kennedy Space Center in Florida, the CubeSats were deployed from the International Space Station on Jan. 26, 2022.

Being selected by CSLI was an inspirational once-in-a-lifetime opportunity for more than 100 undergraduate students who worked on ELaNA 38’s Get Away Special Passive Attitude Control Satellite (GASPACS) CubeSat.

“None of us had ever worked on a project like this, much less built a satellite on our own,” said Jack Danos, team coordinator of Utah State University’s Get Away Special, or GAS Team. “When we first heard the audio beacon from our satellite in orbit, we all cheered.”

It took the GAS Team nearly a decade to develop and build GASPACS – the team’s first CubeSat – with many team members graduating in the process. But the team’s focus remained the same – to deploy and photograph a meter-long inflatable boom, known as the AeroBoom, from its CubeSat in Low Earth orbit.

gaspacs-hq1.jpeg?w=2048
A photograph taken by the GASPACS CubeSat shows the AeroBoom fully deployed.
Utah State University

“When we saw that first photo come through, we were blown away, speechless,” Danos said. “This had been a decade of work and learning everything required for a real satellite mission – a lot of us got skills that we never could have gotten in a normal school environment.”

The team of college students who built Georgia Tech’s Tethering and Ranging mission (TARGIT) developed it to test an imaging LiDAR system capable of detailed topographic mapping from orbit. TARGIT’s students machined the CubeSat components themselves and integrated several new technologies into the final flight system.

“CSLI was a great window into how NASA works and the formal processes to ensure the hardware that gets launched meets requirements,” said Dr. Brian Gunter, principal investigator on the Georgia Institute of Technology TARGIT CubeSat. “Our spacecraft would not have made it to orbit without this program.”

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Georgia Tech’s Tethering and Ranging CubeSat engaged over 100 students at the university and overcame obstacles presented by the global pandemic to get to launch.
Georgia Institute of Technology

Prior to launch, the Georgia Tech team worked closely with NASA’s CSLI team, gained considerable industry experience, and delivered a flight-ready spacecraft, even after COVID forced a full shutdown of activity for an extended period, during which many key team members graduated.

“Just getting the spacecraft ready and delivered was the greatest achievement for the group and was a nice example of teamwork and resiliency from the students,” Gunter said.

Not all ELaNa 38’s CubeSats were student-built. With the goal of studying processes affecting Earth’s upper atmosphere and ionosphere, The Aerospace Corporation’s Daily Atmospheric and Ionospheric Limb Imager (DAILI) CubeSat employed an ambitious forward sunshade that was key to DAILI’s ability to examine atmospheric variations during daytime. As perhaps the most sophisticated sunshade ever flown on a CubeSat, it reduced intense scattered light from the Sun, the Earth’s surface, and low-altitude clouds by a factor of almost a trillion.

DAILI Cubesat.
The Aerospace Corporation’s DAILI featured an ambitious sunshade that helped the CubeSat examine minute variations in the atmosphere.
The Aerospace Corporation

“Not only did we have a shade that occupied over half of the space we had on the CubeSat – we also needed room for the optics, the detector, and for the CubeSat bus,” said Dr. James Hecht, senior scientist at Ionospheric and Atmospheric Sciences at Aerospace and DAILI principal investigator. “The effectiveness of the shade depended greatly on the length of the shade to the angular field of view of DAILI. It was a challenge, but it worked.”

Rounding out the ELaNa 38 flight was the Passive Thermal Coating Observatory Operating in Low Earth Orbit (PATCOOL) satellite, sponsored by NASA’s Launch Services Program and developed by the Advanced Autonomous Multiple Spacecraft Laboratory at the University of Florida. PATCOOL tested a highly reflective surface coating called “solar white” to measure its efficiency as way to passively cool components in space.

PATCOOL CubeSat.
PATCOOL during its development at the Advanced Autonomous Multiple Spacecraft Laboratory at the University of Florida
University of Florida

Through ELaNa 38’s four small satellites, hundreds of individuals – many developing and launching spacecraft for the first time – achieved access to space. For NASA, increasing access to space and making data and innovations accessible to all also serves to reinforce the future of the country’s space industry.

“This is an opportunity that you just can’t get anywhere else – the ability to send something into space, get the ride paid for, and form relationships within the industry,” Danos said. “There are so many members of the team that went into the space industry after the mission – a mission we literally couldn’t have done without NASA’s CSLI.”

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      One of those features is a flat phased array antenna, which gives users the ability to focus HALE InSAR’s radar beam without physically moving the instrument. Using a panel about the size of a tablet computer, operators can steer the beam electronically, eliminating the need for gimbles and other heavy components, which helps enable the instrument’s reduced size and weight.
      A close up HALE InSAR fixed to a high-altitude airship. The flat planar antenna reduces the instruments mass and eliminates the need for gimbles and other heavy components. Credit: Aloft Sensing “SAR needs to look to the side. Our instrument can be mounted straight down, but look left and right on every other pulse such that we’re collecting a left-looking SAR image and a right-looking SAR image essentially simultaneously. It opens up opportunities for the most mass-constrained types of stratospheric vehicles,” said Wye.
      Using advanced positioning algorithms, HALE InSAR also has the unique ability to locate itself without GPS, relying instead on feedback from its own radar signals to determine its position even more accurately. Brian Pollard, Chief Engineer at Aloft Sensing and co-investigator for HALE InSAR, explained that precise positioning is essential for creating high-resolution data about surface deformation and topography.
      “SAR is like a long exposure camera, except with radio waves. Your exposure time could be a minute or two long, so you can imagine how much smearing goes on if you don’t know exactly where the radar is,” said Pollard.
      Navigating without GPS also makes HALE InSAR ideal for field missions in austere environments where reliable GPS signals may be unavailable, increasing the instrument’s utility for national security applications and science missions in remote locations.
      The Aloft Sensing team recently achieved several key milestones, validating their instrument aboard an airship at 65,000 feet as well as small stratospheric balloons. Next, they’ll test HALE InSAR aboard a fixed wing HALE aircraft. A future version of their instrument could even find its way into low Earth orbit on a small satellite.
      Wye credits NASA support for helping her company turn a prototype into a proven instrument.
      “This technology has been critically enabled by ESTO, and the benefit to science and civil applications is huge,” said Wye. “It also exemplifies the dual-use potential enabled by NASA-funded research. We are seeing significant military interest in this capability now that it is reaching maturity. As a small business, we need this hand-in-hand approach to be able to succeed.”
      For more information about opportunities to work with NASA to develop new Earth observation technologies, visit esto.nasa.gov.
      For additional details, see the entry for this project on NASA TechPort.
      Project Lead: Dr. Lauren Wye, CEO, Aloft Sensing
      Sponsoring Organization: NASA’s Instrument Incubation Program (IIP)
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