A 60-year-old mystery regarding the source of some energetic and potentially damaging particles in Earth’s radiation belts is now solved using data from a shoebox-sized satellite built and operated by University of Colorado Boulder students at LASP.
The results from the new study indicate energetic electrons in Earth’s inner radiation belt—primarily near its inner edge—are created by cosmic rays born from explosions of supernovas, said the study’s lead author, LASP scientist Xinlin Li. Earth’s radiation belts, known as the Van Allen belts, are layers of energetic particles held in place by Earth’s magnetic field.
Humans have long been shaping Earth’s landscape, but now scientists know we can shape our near-space environment as well. A certain type of communications—very low frequency, or VLF, radio communications—have been found to interact with particles in space, affecting how and where they move. At times, these interactions can create a barrier around Earth against natural high energy particle radiation in space. These results, part of a comprehensive paper on human-induced space weather, were recently published in Space Science Reviews.
“Our recent work with the LASP Van Allen Probes instruments has shown compelling evidence that the radiation belts are quite subject to human-made waves emanating from ground-based radio transmitters. Thus, humans have not only been affecting the oceans and atmosphere of Earth, but have also been affecting near-Earth space,” said Dan Baker, LASP director and co-author of the paper.
A multimillion dollar CU-Boulder/LASP instrument package expected to help scientists better understand potentially damaging space weather is now slated to launch aboard a National Oceanic and Atmospheric Administration satellite on Saturday, Nov. 19.
Designed and built at LASP, the instrument suite known as the Extreme Ultraviolet and X-ray Irradiance Sensors (EXIS) is the first of four identical packages that will fly on four NOAA weather satellites in the coming decade. EXIS will measure energy output from the sun that can affect satellite operations, telecommunications, GPS navigation and power grids on Earth as part of NOAA’s next-generation Geostationary Operational Environmental Satellites-R Series (GOES-R).
LASP Director, Dan Baker, has been elected Fellow of the American Institute of Aeronautics and Astronautics (AIAA) for its class of 2016. AIAA Fellows are elected based on their notable and valuable contributions to the arts, sciences or technology of aeronautics and astronautics.
In addition to his role as LASP director, Baker is a faculty member in the departments of Physics and Astrophysical and Planetary Sciences at the University of Colorado Boulder. Baker, who chaired the National Research Council’s 2012 Decadal Survey for Solar and Space Physics, is currently involved in a number of NASA missions, including the MAVEN mission to Mars, the Van Allen Probes mission, and the Magnetospheric Multiscale mission.
AIAA is the largest aerospace professional society in the world, serving a diverse range of more than 30,000 individual members from 88 countries, and 95 corporate members. The induction ceremony for the new Fellows will take place at the AIAA Aerospace Spotlight Awards Gala on June 15, 2016 at the Ronald Reagan Building and International Trade Center in Washington, D.C.
LASP Director and University of Colorado Boulder Distinguished Professor, Daniel Baker, was awarded the Vikram A. Sarabhai Professorship and Prize for 2015, which honors internationally distinguished scholars and is named for the founder of India’s space program.
As part of the award, Baker traveled to the Physical Research Laboratory (PRL) in Ahmedabad, Gujarat, India, in February to work with scientists and students and give seminars and lectures. His primary research interests include the study of physical and energetic particle phenomena in the plasma of planetary magnetospheres.
LASP director and research scientist Dan Baker is co-author of new research that indicates that a massive particle accelerator exists in the Van Allen radiation belts, a harsh band of super-energetic, charged particles surrounding our planet. The results were published in Science magazine today.