TIEGCM Model for 2020, 2021 now available

Model runs informed by HME product

Dr. Thomas Immel 0 78

TIEGCM model runs that incorporate the MIGHTI measurements of winds and temperatures are now available on the ICON FTP site. These are run using lower-boundary forcing from the ICON Hough Mode Extension 4.1 product. They are available from Jan 2020 to August 2021, with more to come following the continued production of the 4.1 product.

The zipped NetCDFs are available here.

The Documentation for the TIEGCM 2.0 model is available from the NCAR/HAO site.

Strong Winds Power Electric Fields in the Upper Atmosphere, NASA’s ICON Finds

Karin Hauck 0 93

[NASA Feature by Lina Tran on Nov 29 2021]

What happens on Earth doesn’t stay on Earth.

Using observations from NASA’s ICON mission, scientists presented the first direct measurements of Earth’s long-theorized dynamo on the edge of space: a wind-driven electrical generator that spans the globe 60-plus miles above our heads. The dynamo churns in the ionosphere, the electrically charged boundary between Earth and space. It’s powered by tidal winds in the upper atmosphere that are faster than most hurricanes and rise from the lower atmosphere, creating an electrical environment that can affect satellites and technology on Earth.

The new work, published [Nov 29 2021] in Nature Geoscience, improves our understanding of the ionosphere, which helps scientists better predict space weather and protect our technology from its effects.

 

NASA Rocket, Satellite Tag-Team to View the Giant Electric Current in the Sky

Mission launch timed as ICON passes nearby to compare perspectives on dynamo

Karin Hauck 0 224

by Miles Hatfield, NASA —The Dynamo-2 sounding rocket mission will launch two rockets coordinated with the passing of the ICON satellite overhead to study a churning electric current in the upper atmosphere. The mission is just the latest in a centuries-long quest to understand the atmospheric dynamo, beginning with Michael Faraday’s invention of the electric generator.

Some 50 miles up, where Earth’s atmosphere blends into space, the air itself hums with an electric current. Scientists call it the atmospheric dynamo, an Earth-sized electric generator. It’s taken hundreds of years for scientists to lay the groundwork to understand it, but the principles that keep it running are only just now being revealed in detail. 

Following up on its predecessor’s 2013 flight, the Dynamos, Winds, and Electric Fields in the Daytime Lower Ionosphere-2, or Dynamo-2, sounding rocket mission will soon pierce the atmospheric winds thought to keep the dynamo churning. With the sounding rocket’s launch timed as NASA’s ICON (Ionospheric Connection Explorer) satellite passes nearby, these two space missions will combine their perspectives to advance our understanding of the giant electric circuit in the sky.

Science Data Update: First Hough Mode retrievals coming to the data site

Dr. Thomas Immel 0 525

ICON is in process of approving the Hough Mode product, the first Level 4 product, available for most of 2020. This product comes in 2 parts; 1) a set of diurnal and semidiurnal tidal amplitudes in a sliding 30-day window for 2020 centered on the day of interest, and 2) a TIEGCM lower boundary specification for the same date.

Update: These files are now all available on the public ftp site

Documentation for each of these components (1, 2) of the product are also available on the FTP site.

First ICON Science Data Released to Public

Karin Hauck 0 1005

[by Lina Tran on the NASA blog] On June 22, NASA’s ICON team released scientific data collected during the spacecraft’s first eight months in orbit to the public.

The data release features observations from ICON’s four instruments — MIGHTI, FUV, EUV, and IVM — which have been observing the ins and outs of the ionosphere, the sea of charged particles high in the upper atmosphere. Scientists have been busy parsing the wealth of observations collected by ICON in preparation for the mission’s first science results, which will be released later this year.

“ICON was designed, built, and launched to provide data we had never seen before, and it has not disappointed us in any regard,” said Thomas Immel, ICON principal investigator at University of California, Berkeley. Immel said he was pleased to share ICON’s first data with the world. “The sensitivity and precision of our observations, and the unique orbit and mission design, give us a new and advanced tool for unlocking all the puzzling questions we have had about the connection between Earth’s atmosphere and our space environment.”

The release coincides with the virtual summer meeting of CEDAR, the Coupling, Energetics, and Dynamics of Atmospheric Regions program. The newly released data spans measurements made since the mission’s launch on Oct. 10, 2019. Data can be accessed through University of California Berkeley’s Space Sciences Lab.

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ICON skin is based on Greytness by Adammer
Background image, courtesy of NASA, is a derivitave of photograph taken by D. Pettit from the ISS, used under Creative Commons license