Posts Tagged: Geophysical Research Letters

GOLD reveals unexpected changes in Earth’s nighttime ionosphere

NASA’s Global-scale Observations of the Limb and Disk (GOLD) mission has observed dramatic and unexplained shifts in the location of features in the Earth’s ionosphere surrounding the equator. Unanticipated changes in the nighttime ionosphere can lead to disruptions in communication and navigation that depend on satellites, such as GPS.

GOLD is an ultraviolet imaging spectrograph that was designed and built at LASP and is hosted on the SES-14 communications satellite. The latest discoveries from the mission are challenging mission scientists and were published last week in Geophysical Research Letters.

Since reaching orbit in October 2018, GOLD has been making observations of the Equatorial Ionization Anomaly (EIA), regions of the ionosphere with enhanced electron density north and south of the magnetic equator. One of the primary goals of the mission is to better understand the behavior of the EIA and the instabilities within it. GOLD presents a new ability to image the variability of ionospheric plasma and, ultimately, to understand its causes.

LASP research points to electrostatic dust transport in reshaping airless planetary bodies

A team of LASP scientists, led by University of Colorado physics professor Mihály Horányi, has conducted laboratory experiments that may bring closure to a long-standing issue of electrostatic dust transport, explaining a variety of unusual phenomena on the surfaces of airless planetary bodies, including observations from the Apollo era and the recent Rosetta mission to Comet 67P.

PRESS RELEASE: Shrinking atmospheric layer linked to low levels of solar radiation

LASP scientist and CU professor Tom Woods contributed to a study indicating that large changes in the sun’s energy output may drive unexpectedly dramatic fluctuations in Earth’s outer atmosphere. The study, published today in Geophysical Research Letters, links a recent, temporary shrinking of a high atmospheric layer with a sharp drop in the sun’s ultraviolet… Read more »