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SPORT and petitSat cubesats to shed light on space weather disturbances
by Matina Douzenis for GSFC News
Greenbelt MD (SPX) Jan 01, 2023

File image of SPORT under development.

Two CubeSats, or small satellites, are on a quest to provide insight on space weather disturbances and the subsequent impact on communication signals. The dynamic duo, the Plasma Enhancements in the Ionosphere-Thermosphere Satellite (petitSat) and Scintillation Prediction Observations Research Task (SPORT), arrived at the International Space Station on Nov. 27, 2022, as part of SpaceX's 26th commercial resupply mission for NASA. Both CubeSats deployed from the space station on Dec. 29, 2022, at 8:55 a.m. EST.

Scientists on both missions are most interested in studying a layer in Earth's upper atmosphere known as the ionosphere. The ionosphere is where the impacts of space weather on our technology are felt most strongly. It's home to many satellites, including the International Space Station. Radio waves and GPS signals travel through the ionosphere, and variations there can interfere with, or even disrupt, our communication signals. Space weather can also create electric currents that can induce electrical charge in orbiting satellites, and, in extreme cases, cause power outages on the ground.

Day in and day out, the ionosphere is cooked by the Sun's radiation into a soup of positively charged ions and negatively charged electrons, called plasma. Fluctuations in the ionosphere cause low-density and high-density regions - bubbles and blobs - to form in the plasma. These bubbles and blobs can scatter radio signals, sometimes sending them crashing into each other in a phenomenon called scintillation. The result is noisy radio signals, which can reduce the reliability of communication and navigation systems, or even disrupt signals completely.

"If you put a pencil into a glass of water that's half full, the pencil appears broken," said Linda Habash Krause, the project scientist for SPORT at NASA's Marshall Space Flight Center in Huntsville, Alabama. "What happens when you have bubbles? Similar to the pencil in the water, the signals go through ample bends."

Unfortunately, scientists do not understand exactly how the plasma bubbles and blobs arise. Once petitSat and SPORT are launched from the space station, the two CubeSats will use complementary scientific instruments to investigate the conditions that cause these disruptive features to form.

"The idea is that the science teams will work together and cross compare," said Jeff Klenzing, the principal investigator of petitSat at NASA's Goddard Space Flight Center in Greenbelt, Maryland.

SPORT is equipped with six instruments to make measurements throughout the ionosphere. It will help determine the conditions that exist just before plasma bubbles form and, ultimately, how their evolution impacts ground-based communications signals. SPORT will transmit data back to the Brazilian National Institute for Space Research (INPE), where the data will be distributed to researchers at INPE, NASA, and other U.S. partners.

In a complementary fashion, petitSat will work to determine what triggers plasma blobs, when they appear, or even how large a region they occupy. Both petitSat and SPORT will provide improved observations and insights into space weather phenomena which impact communications. These missions will collectively enhance our understanding of our ever-changing space environment and amplify current capabilities of small satellites to directly benefit our society.

The more we learn about space weather - and how to predict it - the better we can protect our astronauts, spacecraft, and technology.


Related Links
SPORT at NASA
petitSat Misson
Solar Science News at SpaceDaily


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The world's largest turbulence simulation unmasks the flow of energy in astrophysical plasmas
Plainsboro NJ (SPX) Dec 27, 2022
Researchers have uncovered a previously hidden heating process that helps explain how the atmosphere that surrounds the Sun called the "solar corona" can be vastly hotter than the solar surface that emits it. The discovery at the U.S. Department of Energy's (DOE) Princeton Plasma Physics Laboratory (PPPL) could improve tackling a range of astrophysical puzzles such as star formation, the origin of large-scale magnetic fields in the universe, and the ability to predict eruptive space weather events ... read more

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