Updated version of GAIM model goes operational

May 02, 2008

An updated version of the Global Assimilation of Ionospheric Measurements (GAIM) model went operational at the Air Force Weather Agency (AFWA) on February 22, 2008. The operational GAIM program has been under development since 1999 by the U.S. Department of Defense and is managed by the Naval Research Laboratory’s (NRL) Space Science Division. This new version of GAIM is capable of ingesting ultraviolet (UV) data sets from DMSP satellites.

GAIM uses a physics-based model as the basis for assimilating a diverse set of near real-time ionospheric measurements. The ionospheric specifications and forecasts that GAIM generates are in the form of three-dimensional electron density distributions from 90 km to geosynchronous altitudes (35,000 km). The first operational version of GAIM, which went operational at AFWA in December 2006, assimilated slant-TEC observations from GPS ground receiver sites, bottom-side electron density profiles from ionosondes, and in-situ electron density observations from the operational Defense Meteorological Satellite Program (DMSP).

The new operational version of GAIM can assimilate ultraviolet (UV) observations from DMSP sensors, including the Special Sensor Ultraviolet Limb Imager (SSULI), which has been developed by NRL’s Space Science Division. Scientists at NRLs’ Space Science Division were instrumental in adding these additional assimilative capabilities to the new operational version of GAIM.

Source: Naval Research Laboratory

Explore further: Research cruise delves into Perth Canyon's depths

add to favorites email to friend print save as pdf

Related Stories

Recommended for you

Arson to blame for Argentine forest fires

3 hours ago

Fires that have ravaged some 20,000 hectares of forest in Argentina's remote Patagonia region were deliberately set, according to Argentine officials on Monday.

Water in smog may reveal pollution sources

4 hours ago

The chemical signature of water vapor emitted by combustion sources such as vehicles and furnaces has been found in the smoggy winter inversions that often choke Salt Lake City. The discovery may give researchers ...

Research cruise delves into Perth Canyon's depths

11 hours ago

A world-first expedition backed by Google billionaire Eric Schmidt is bidding to unlock the secrets of the Perth Canyon, the vast undersea gorge carved by the prehistoric Swan River.

User comments : 0

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.