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‘Standing on a comet’: Rosetta mission will contribute to space weather research

By Guest PostJanuary 16, 2014Scienceandre bieler, archeological artifacts, carbon dioxide, churyumov gerasimenko, comet 67p, comet bound spacecraft, electric grid, electrified particles, european space agency, evolution, ionosphere, kenneth hansen, michael combi, model, on a comet, orbit of neptune, origin, planets, rosetta, rosetta mission, rosetta mission lander, rosetta orbiter, satellites, solar system, space weather research, standing, sun, tamas gombosi, the philae lander, university of michigan, valeriy tenishev

ANN ARBOR — A comet-bound spacecraft that’s been in sleep mode for more than two years is scheduled to wake up on the morning of Jan. 20—beginning the home stretch of its decade-long journey to a mile-wide ball of rock, dust and ice.

If all goes as planned, Rosetta—a European Space Agency-led mission that involves University of Michigan engineers and scientists—will be the first craft to actually land on a comet as well as track it for an extended period of time. (more…)

Seeing Stars, Finding Nukes: Radio Telescopes Can Spot Clandestine Nuclear Tests

By Guest PostDecember 11, 2012Environment, Scienceagu, american geophysical union, amplitudes, astronomical radio telescopes, atmosphere, China, distant galaxy, dorota grejner brzezinska, earth, global community, gnss, gps stations, gps systems, hunters trophy, ionosphere, Japan, jihye park, joseph helmboldt, kilotons, nevada, nevada test site, new mexico, north korea, north korean bomb, north korean explosion, north korean test, nuclear test, ohio state university, radio astronomer, radio telescopes, ralph von frese, rogue nukes, russia, socorro, south Korean, telltale atmospheric disturbances, thomas wilson, underground nuclear explosions, university of nottingham, very large array, vla, yu jade morton

SAN FRANCISCO — In the search for rogue nukes, researchers have discovered an unlikely tool: astronomical radio telescopes.

Ohio State University researchers previously demonstrated another unlikely tool, when they showed that South Korean GPS stations detected telltale atmospheric disturbances from North Korea’s 2009 nuclear test.

Both techniques were born out of the discovery that underground nuclear explosions leave their mark—on the outer reaches of Earth’s atmosphere. (more…)

GPS Stations Can Detect Clandestine Nuclear Tests

By Guest PostJune 15, 2011Environment, Scienceair molecules, airborne radioactive gas, bubble of disturbed particles, chemical sensors, comprehensive nuclear-test-ban treaty organization, computer algorithms, ctbto, dorota grejner brzezinska, earth, eastern asia, evidence of a nuclear explosion, fluctuation in atmospheric electron density, gangwon province, geodetic science, global positioning system, gps, hamyong province, igs, illegal nuclear explosions, inje county, international gnss service, ionosphere, ionospheric electron density, jihye park, luis gaya pique, north korea, north korean nuclear test in 2009, ohio state university, punggye, ralph von frese, seismic detectors, shockwave, south korea, south korean gps network, underground nuclear tests, upper atmosphere, yu morton

VIENNNA, Austria – At the Comprehensive Nuclear-Test-Ban Treaty Organization (CTBTO) meeting, American researchers are unveiling a new tool for detecting illegal nuclear explosions: the Earth’s global positioning system (GPS).

Even underground nuclear tests leave their mark on the part of the upper atmosphere known as the ionosphere, the researchers discovered, when they examined GPS data recorded the same day as a North Korean nuclear test in 2009. Within minutes on that day, GPS stations in nearby countries registered a change in ionospheric electron density, as a bubble of disturbed particles spread out from the test site and across the planet. (more…)

Tag Archives: ionosphere

‘Standing on a comet’: Rosetta mission will contribute to space weather research

Seeing Stars, Finding Nukes: Radio Telescopes Can Spot Clandestine Nuclear Tests

GPS Stations Can Detect Clandestine Nuclear Tests