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Latest Ionosphere Stories

NASA Selects NRL's MIGHTI For Potential Space Flight
2011-11-11 04:01:38

A Naval Research Laboratory instrument designed to study the Earth's thermosphere is part of a future science mission that has been selected by NASA for evaluation for flight. The NRL-developed Michelson Interferometer for Global High-resolution Thermospheric Imaging (MIGHTI) satellite instrument is part of the Ionospheric Connection Explorer (ICON) mission, led by Thomas Immel at the University of California, Berkeley. The ICON mission will fly instruments designed to understand the...

Swarm Satellites Get Their Bearings
2011-10-28 04:44:31

ESA´s Swarm satellites, which will unravel the complexities of Earth´s magnetic shield, are being put through their paces to ensure that they will withstand the rigors of space. Marking an important milestone, the first satellite has undergone magnetic testing. Comprising three identical satellites, Swarm is ESA´s first constellation of Earth observation satellites. They are due to liftoff together on a Rockot launcher from Plesetsk in northern Russia next year. As the...

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2011-07-15 12:53:34

By Kim Gudeman, University of Illinois Researchers at the University of Illinois have become the first to record an airglow signature in the upper atmosphere produced by a tsunami using a camera system based in Maui, Hawaii. The signature, caused by the March 11 earthquake that devastated Japan, was observed in an airglow layer 250 kilometers above the earth's surface. It preceded the tsunami by one hour, suggesting that the technology could be used as an early-warning system in the future....

2011-07-14 15:00:40

Radio broadcasters compete for airwave space in the saturated FM range, in detriment to AM wavebands with a poorer sound quality. Nevertheless, frequencies at wavebands less than 30 MHz (AM ones) could well have a new opportunity, with terrestrial digital radio broadcasting. The Digital Radio Mondiale (DRM) international consortium is working on the development of a universal system that will provide clarity which is close to that of FM, besides other advantages such as the multilingual...

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2011-07-06 10:52:24

Some 50 miles up in the sky begins a dynamic region of the atmosphere known as the ionosphere. The region is filled with charged particles created by extreme ultraviolet radiation from the sun. At the base of the ionosphere, charged particle motions create a global current called the "atmospheric dynamo." Generally moving in loops from the equator to the poles, the dynamo changes daily based on solar heating and magnetic activity "“ but what keeps it moving isn't well understood. This...

2011-04-20 10:16:51

The Van Allen radiation belts are a hazardous environment, full of 'killer' electrons that can be lethal to orbiting satellites. And when those electrons sometimes hit the atmosphere, they alter its chemistry with implications for climate variation. Now students at a school in Yorkshire are set to help scientists better understand the belts. Dr Andrew Kavanagh will present this innovative project between Lancaster University and Headlands School and Community Science College on Wednesday 20...

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2011-03-17 09:07:07

Scientists use innovative Radio Aurora Explorer satellite to discover conditions that cause disruptions in space-based communication and navigation signals Space weather-based disturbances in the Earth's upper atmosphere cause disruptions that affect space-based communication and navigation signals, such as GPS and radio signals. Radio Aurora Explorer (RAX) is a space weather research satellite that is designed to investigate the causes of these weather disturbances. RAX is the first...

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2011-02-25 09:33:58

Massive waves in giant magnetic holes on the surface of the Sun have been discovered for the first time by solar scientists from the University of Sheffield and Queen´s University Belfast, something that will bring experts a step closer to unlocking the secrets of the Sun. The Sun is interwoven by a complex network of magnetic field lines that are responsible for a large variety of fascinating features that can be seen in the solar atmosphere. Large, dark regions, which...

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2011-02-18 05:55:00

A surge of charged plasma particles from a massive solar eruption has brushed off the Earth's northern pole, producing auroras and disrupting some radio communications, according to NASA scientists. However, the Earth appears to have dodged a widespread geomagnetic storm, with the effects confined to the northern latitudes, possibly as far south as Canada and Norway. "There can be sporadic outages based on particular small-scale events," said Dean Persnell, project scientist at NASA's Solar...

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2011-01-18 12:39:13

The first global simulation study of equatorial spread F (ESF) bubble evolution using a comprehensive 3D ionosphere model, SAMI3, has been demonstrated. The model self-consistently solves for the neutral wind driven dynamo electric field and the gravity driven electric field associated with plasma bubbles. Developed by Dr. Joseph Huba and Dr. Glenn Joyce at the NRL Plasma Physics Division, SAMI3 is a fully three-dimensional model of the low- to mid-latitude ionosphere. SAMI3 has been modified...


Latest Ionosphere Reference Libraries

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2004-10-19 04:45:40

Arecibo Observatory -- The Arecibo Observatory is part of the National Astronomy and Ionosphere Center (NAIC), a national research center operated by Cornell University under a cooperative agreement with the National Science Foundation (NSF). The NSF is an independent federal agency whose aim is to promote scientific and engineering progress in the United States. NSF funds research and education in most fields of science and engineering. Additional support is provided by the National...

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Word of the Day
sough
  • A murmuring sound; a rushing or whistling sound, like that of the wind; a deep sigh.
  • A gentle breeze; a waft; a breath.
  • Any rumor that engages general attention.
  • A cant or whining mode of speaking, especially in preaching or praying; the chant or recitative characteristic of the old Presbyterians in Scotland.
  • To make a rushing, whistling, or sighing sound; emit a hollow murmur; murmur or sigh like the wind.
  • To breathe in or as in sleep.
  • To utter in a whining or monotonous tone.
According to the OED, from the 16th century, this word is 'almost exclusively Scots and northern dialect until adopted in general literary use in the 19th.'
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