Articles tagged "swarm"

new feature discovered in the night sky steve

New phenomenon discovered in the night sky

A new phenomenon seen as a giant purple streak of light in the night sky has been recently discovered and, for lack of a better word, named Steve. Steve was discovered thanks to scientists, citizen scientists, ground-based imagers and ESA's magnetic field Swarm...

April 21, 2017

seasonal asymmetry birkeland currents

Birkeland currents stronger in the northern hemisphere, vary with the season

ESA’s Swarm mission has discovered that this seasonal variation of Birkeland currents, strong electric currents in the upper atmosphere, is not the same in the north and south polar regions. Named after Kristian Birkeland, the scientist a century ago who first...

March 23, 2017

Atmospheric supersonic plasma jets discovered

Supersonic plasma jets discovered

Scientists analyzing data obtained by Swarm trio of satellites have discovered supersonic plasma jets high up in our atmosphere that can push temperatures up to almost 10 000 °C (18 000 °F). The discovery was presented at this week’s Swarm Science...

March 23, 2017

highest resolution map of earth s lithospheric magnetic field

Highest resolution map of Earth’s lithospheric magnetic field

After three years of collecting data, Swarm mission scientists have produced the highest resolution map of Earth’s lithospheric magnetic field from space to date. The dataset combines measurements from ESA’s Swarm satellites with historical data from the...

March 21, 2017

swarm b on collision course with space debris

Swarm-B on possible collision course with space debris

US armed forces’ Joint Space Operations Center (JSpOC) has identified a close approach for ESA's Swarm-B satellite forecast to occur at 23:10 UTC on January 25, 2017. The forecast miss distance is just 361 m (1 184 feet), and this triggers a risk above the...

January 24, 2017

scientists discover accelerating jet stream in earth core

Accelerating high-latitude jet stream discovered in Earth’s core

Scientists using data obtained by ESA's Swarm constellation of satellites have discovered a jet stream in the liquid iron part of Earth’s core 3 000 km (1 864 miles) beneath the surface. In addition, Swarm satellite data show that this jet stream is...

December 20, 2016

swarm experiencing blackout over equator

Scientists discover why satellites black out over equator

ESA's Swarm satellite trio has discovered why GPS navigation systems on low-orbiting satellites sometimes black out when they fly over the equator between Africa and South America. Swarm itself has experienced this anomaly numerous times before its scientists...

November 01, 2016

magnetic_field_feat

Earth's magnetic field changes mapped in detail

A group of experts utilized the data collected by the ESA's SWARM satellites to show how the magnetic field is pulsating, where it's weakening and strengthening, and how fast these changes occur. For the first time, experts have mapped both the changes...

May 11, 2016

current_magnetic_complexity_esa_f

Earth's magnetic complexity begins to untangle - Swarm mission

After a year in orbit, the three Swarm satellites have provided a first glimpse inside Earth and started to shed new light on the dynamics of the upper atmosphere – all the way from the ionosphere about 100 km above, through to the outer reaches of our protective

June 22, 2015

earths_magnetic_field_cn

Earth’s magnetic field can flip in less than 100 years, new study

It is known that Earth’s magnetic field has flipped many times throughout the planet’s history. Its dipole magnetic field remains about the same intensity for thousands to millions of years, but for incompletely known reasons it occasionally weakens (such is

October 15, 2014

Earth_s_protective_shield_node_full_image_2

Earth's magnetic field showing signs of significant weakening

The first set of high-resolution results from ESA’s three-satellite Swarm constellation reveals the most recent changes in the magnetic field that protects us from cosmic radiation and charged particles that bombard Earth. Magnetic field is in a permanen

June 19, 2014

swarm_esa_f

Three-satellite Swarm constellation launched to study Earth's magnetic field

ESA’s three-satellite "Swarm" constellation was launched into a near-polar orbit by a Russian Rockot launcher on November 22, 2013. In next four years, Swarm satellites will monitor Earth’s magnetic field, from the depth of our

November 22, 2013

berkeley laser magnetometer lg

Ground-Based Lasers Vie With Satellites To Map Earth's Magnetic Field

Mapping the Earth's magnetic field - to find oil, track storms or probe the planet's interior - typically requires expensive satellites. University of California, Berkeley, physicists have now come up with a much cheaper way to measure the Earth's magnetic field

February 22, 2011