SSUSI Bibliography

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Found 15 entries in the Bibliography.

Showing entries from 1 through 15

2015

Remote Sensing of Earth\textquoterights Limb by TIMED/GUVI: Retrieval of thermospheric composition and temperature

The Global Ultraviolet Imager (GUVI) onboard the Thermosphere-Ionosphere-Mesosphere Energetics and Dynamics (TIMED) satellite senses far ultraviolet emissions from O and N₂ in the thermosphere. Transformation of far ultraviolet radiances measured on the Earth limb into O, N₂, and O₂ number densities and temperature quantifies these responses and demonstrates the value of simultaneous altitude and geographic information. Composition and temperature variations are available from 2002 to 2007. This paper documents the extraction of these data products from the limb emission rates. We present the characteristics of the GUVI limb observations, retrievals of thermospheric neutral composition and temperature from the forward model, and the dramatic changes of the thermosphere with the solar cycle and geomagnetic activity. We examine the solar extreme ultraviolet (EUV) irradiance magnitude and trends through comparison with simultaneous Solar Extreme EUV (SEE) measurements on TIMED and find the EUV irradiance inferred from GUVI averaged (2002\textendash2007) 30\% lower magnitude than SEE version 11 and varied less with solar activity. The smaller GUVI variability is not consistent with the view that lower solar EUV radiation during the past solar minimum is the cause of historically low thermospheric mass densities. Thermospheric O and N₂ densities are lower than the NRLMSISE-00 model, but O₂ is consistent. We list some lessons learned from the GUVI program along with several unresolved issues.

Meier, R.; Picone, J.; Drob, D.; Bishop, J.; Emmert, J.; Lean, J.; Stephan, A.; Strickland, D.; Christensen, A.; Paxton, L.; Morrison, D.; Kil, H.; Wolven, B.; Woods, Thomas; Crowley, G.; Gibson, S.;

Published by: Earth and Space Science Published on: 01/2015

YEAR: 2015 DOI: 10.1002/2014EA000035

airglow and aurora; thermosphere: composition and chemistry; thermosphere: energy deposition; remote sensing

2013

Multi-Instrument Observations at High Latitudes

Miller, E; Paxton, L; Schaefer, RK; Weiss, M; Wolven, BC; Zhang, Y;

Published by: Published on:

YEAR: 2013 DOI:

Observing the Edge of the Inner Radiation Belt: the South Atlantic Anomaly Seen with Photometers in Low Earth Orbit

Schaefer, RK; Wolven, BC; Paxton, L; Romeo, G; Selby, C; Hsieh, SW;

Published by: Published on:

YEAR: 2013 DOI:

SSUSI: A Newly Available Resource for the Upper Atmosphere Community to Study the Global Response of the Coupled Ionosphere Thermosphere System

The Global Ultraviolet Imager (GUVI) on TIMED was actually the 7th wide field of regard instrument built by APL. Five SSUSI instruments were built by APL and delivered, calibrated and ready for flight between 1994 and 1996. Another instrument, the Near Infrared Spectrograph was flown on the NASA NEAR mission using the SSUSI optical design. The first SSUSI flight was in 2003 on the DMSP F16 spacecraft. Two others have flown since then on DMSP F17 and F18. Two more await flight with the next slated for a Spring 2014 launch on DMSP F19. Recently, the SSUSI data have been made publicly releasable so they are, in principle, available to the research community. However, there are no funds to actually provide access to these products. We are working with various partners to provide a venue to access to the many products we routinely produce. SSUSI provides data products that both monitor the state of the auroral regions and yields a detailed picture of the ionosphere. SSUSI gives us the ability to observe the dynamics of these systems during storm and quiet periods throughout an entire solar cycle. The near polar orbit of the DMSP satellite provided excellent coverage of the auroral oval during solar minimum. During storm times, the high inclination orbit allows us to track the progress of the storm with 30 minute revisit time. In this presentation, we will also discuss the ability of SSUSI to image ionospheric dynamics and provide 3D images of the ionosphere. These data, when combined with assimilative data techniques provides a powerful new capability for examining the small and large scale structure of the ionosphere in a way that is not accessible to either GOLD or ICON.

Paxton, L.; Schaefer, R.~K.; Weiss, M.; Wolven, B.~C.; Zhang, Y.; Miller, E.; Bust, G.~S.; Romeo, G.;

Published by: AGU Fall Meeting Abstracts Published on:

YEAR: 2013 DOI:

0355 ATMOSPHERIC COMPOSITION AND STRUCTURE Thermosphere: composition and chemistry; 2407 IONOSPHERE Auroral ionosphere; 2415 IONOSPHERE Equatorial ionosphere; 7954 SPACE WEATHER Magnetic storms

UV Remote Sensing Data Products-Turning Data Into Knowledge

Weiss, M; Paxton, L; Schaefer, RK; Comberiate, J; Hsieh, SW; Romeo, G; Wolven, BC; Zhang, Y;

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YEAR: 2013 DOI:

2009

Visualization and Analysis of Spectrograph-mode Data Products from Far Ultraviolet Scanning Imaging Sensors

Wolven, BC; Schaefer, RK; Hsieh, SW; Paxton, LJ;

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