Bibliography
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Found 80 entries in the Bibliography.
Showing entries from 1 through 50
| 2017 |
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The Global-Scale Observations of the Limb and Disk (GOLD) Mission The Earth\textquoterights thermosphere and ionosphere constitute a dynamic system that varies daily in response to energy inputs from above and from below. This system can exhibit a significant response within an hour to changes in those inputs, as plasma and fluid processes compete to control its temperature, composition, and structure. Within this system, short wavelength solar radiation and charged particles from the magnetosphere deposit energy, and waves propagating from the lower atmosphere dissipate. Understanding the global-scale response of the thermosphere-ionosphere (T-I) system to these drivers is essential to advancing our physical understanding of coupling between the space environment and the Earth\textquoterights atmosphere. Previous missions have successfully determined how the \textquotedblleftclimate\textquotedblright of the T-I system responds. The Global-scale Observations of the Limb and Disk (GOLD) mission will determine how the \textquotedblleftweather\textquotedblright of the T-I responds, taking the next step in understanding the coupling between the space environment and the Earth\textquoterights atmosphere. Operating in geostationary orbit, the GOLD imaging spectrograph will measure the Earth\textquoterights emissions from 132 to 162 nm. These measurements will be used image two critical variables\textemdashthermospheric temperature and composition, near 160 km\textemdashon the dayside disk at half-hour time scales. At night they will be used to image the evolution of the low latitude ionosphere in the same regions that were observed earlier during the day. Due to the geostationary orbit being used the mission observes the same hemisphere repeatedly, allowing the unambiguous separation of spatial and temporal variability over the Americas. Eastes, R.; McClintock, W.; Burns, A.; Anderson, D.; Andersson, L.; Codrescu, M.; Correira, J.; Daniell, R.; England, S.; Evans, J.; Harvey, J.; Krywonos, A.; Lumpe, J.; Richmond, A.; Rusch, D.; Siegmund, O.; Solomon, S.; Strickland, D.; Woods, T.; Aksnes, A.; Budzien, S.; Dymond, K.; Eparvier, F.; Martinis, C.; Oberheide, J.; Published by: Space Science Reviews Published on: 10/2017 YEAR: 2017 DOI: 10.1007/s11214-017-0392-2 |
| 2015 |
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Remote sensing of Earth's 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; remote sensing; thermosphere: composition and chemistry; thermosphere: energy deposition |
| 2013 |
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The GOLD Science Data Center-Algorithm Heritage, Data Product Descriptions and User Services Lumpe, JD; Foroosh, H; Eastes, R; Krywonos, A; Evans, JS; Burns, AG; Strickland, DJ; Daniell, RE; England, S; Solomon, SC; , others; Published by: Published on: |
| 2012 |
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Strickland, D.; Evans, J.; Correira, J.; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2011JA017350 |
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Hecht, J.; Mulligan, T.; Correira, J.; Clemmons, J.; Strickland, D.; Walterscheid, R.; Conde, M.; Published by: Journal of Geophysical Research Published on: Jan-01-2012 YEAR: 2012 DOI: 10.1029/2011JA017146 |
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Strickland, DJ; Evans, JS; Correira, J; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Knight, HK; Strickland, DJ; Correira, J; Hecht, JH; Straus, PR; Published by: Journal of Geophysical Research: Space Physics Published on: |
| 2011 |
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Ajello, Joseph; Mangina, Rao; Strickland, Douglas; Dziczek, Dariusz; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2010JA016103 |
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Solar extreme ultraviolet irradiance: Present, past, and future Lean, J.; Woods, T.; Eparvier, F.; Meier, R.; Strickland, D.; Correira, J.; Evans, J.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2010JA015901 |
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Ajello, Joseph; Mangina, Rao; Strickland, Douglas; Dziczek, Dariusz; Published by: Journal of Geophysical Research: Space Physics Published on: |
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A downward revision of a recently reported proton auroral LBH emission efficiency Correira, J; Strickland, DJ; Evans, JS; Knight, HK; Hecht, JH; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Comparison of solar energy flux Q EUV (< 45 nm) from SSUSI, GUVI, EVE, SEE, and SEM Correira, J; Evans, JS; Strickland, DJ; Published by: Published on: |
| 2010 |
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Hecht, JH; Mulligan, T; Clemmons, JH; Strickland, DJ; Correira, J; Conde, MG; Published by: Published on: |
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A new proton auroral extrapolation method applied in the estimation of FUV emission yields Knight, HK; Strickland, DJ; Correira, J; Evans, JS; Hecht, JH; Published by: Published on: |
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Ionospheric E-Region Chemistry and Energetics Mertens, Christopher; Mlynczak, Martin; Gronoff, Guillaume; Yee, Jeng-Hwa; Swenson, Charles; Fish, Chad; Wellard, Stan; Lumpe, Jerry; Strickland, Doug; Evans, Scott; Published by: To propose an Earth-observing, multi-satellite science mission to explore the last remaining frontier in upper atmospheric research—the ionospheric E-region Published on: |
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Correira, J; Strickland, DJ; Evans, JS; Knight, HK; Published by: Published on: |
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In-Situ O/N2 Ratios from the AFRL Mass Spectrometer on the TacSat-2 Satellite Wise, John; Ballenthin, John; Marcos, Frank; Thorn, Willard; Sutton, E; Stastny, N; Chavez, F; Strickland, D; Published by: Published on: |
| 2008 |
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XUV Photometer System (XPS): Improved Solar Irradiance Algorithm Using CHIANTI Spectral Models Woods, Thomas; Chamberlin, Phillip; Peterson, W.; Meier, R.; Richards, Phil; Strickland, Douglas; Lu, Gang; Qian, Liying; Solomon, Stanley; Iijima, B.; Mannucci, A.; Tsurutani, B.; Published by: Solar Physics Published on: Jan-08-2008 YEAR: 2008 DOI: 10.1007/s11207-008-9196-6 |
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Periodic modulations in thermospheric composition by solar wind high speed streams Crowley, G.; Reynolds, A.; Thayer, J.; Lei, J.; Paxton, L.; Christensen, A.; Zhang, Y.; Meier, R.; Strickland, D.; Published by: Geophysical Research Letters Published on: Jan-01-2008 YEAR: 2008 DOI: 10.1029/2008GL035745 |
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Thermospheric density in the Earth s magnetic cusp as observed by the Streak mission Clemmons, JH; Hecht, JH; Salem, DR; Strickland, DJ; Published by: Geophysical Research Letters Published on: |
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Hecht, JH; Mulligan, T; Strickland, DJ; Kochenash, AJ; Murayama, Y; Tanaka, Y-M; Evans, DS; Conde, MG; Donovan, EF; Rich, FJ; , others; Published by: Journal of Geophysical Research: Space Physics Published on: |
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Knight, HK; Strickland, DJ; Hecht, JH; Straus, PR; Morrison, D; Paxton, LJ; Evans, DS; Published by: Journal of Geophysical Research: Space Physics Published on: |
| 2007 |
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Strickland, D.; Lean, J.; Daniell, R.; Knight, H.; Woo, W.; Meier, R.; Straus, P.; Woods, T.; Eparvier, F.; McMullin, D.; Christensen, A.; Morrison, D.; Paxton, L.; Published by: Journal of Geophysical Research Published on: Jan-01-2007 YEAR: 2007 DOI: 10.1029/2006JA012074 |
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Strickland, DJ; Lean, JL; , Daniell; Knight, HK; Woo, WK; Meier, RR; Straus, PR; Woods, TN; Eparvier, FG; McMullin, DR; , others; Published by: Journal of Geophysical Research: Space Physics Published on: |
| 2006 |
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Hecht, J.H.; Strickland, D.J.; Conde, M.G.; Published by: Journal of Atmospheric and Solar-Terrestrial Physics Published on: Jan-09-2006 YEAR: 2006 DOI: 10.1016/j.jastp.2005.06.022 |
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Application of thermospheric general circulation models for space weather operations Fuller-Rowell, T.J.; Codrescu, M.V.; Minter, C.F.; Strickland, D.; Published by: Advances in Space Research Published on: Jan-01-2006 YEAR: 2006 DOI: 10.1016/j.asr.2005.12.020 |
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Global thermosphere-ionosphere response to onset of 20 November 2003 magnetic storm Crowley, G.; Hackert, C.; Meier, R.; Strickland, D.; Paxton, L.; Pi, X.; Mannucci, A.; Christensen, A.; Morrison, D.; Bust, G.; Roble, R.; Curtis, N.; Wene, G.; Published by: Journal of Geophysical Research Published on: Jan-01-2006 YEAR: 2006 DOI: 10.1029/2005JA011518 |
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Craven, JD; Christensen, AB; Paxton, LJ; Strickland, DJ; Published by: Published on: |
| 2005 |
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The NASA TIMED/GUVI experiment obtained unprecedented far ultraviolet images of thermospheric composition and temperature during the intense geomagnetic storm on 20\textendash21 November 2003. Geographic maps of the atomic oxygen to molecular nitrogen column density ratio show severe depletions that extend to the equator near the peak of the storm. This ratio is a key indicator of how the thermospheric composition is disrupted at high latitudes and how the perturbed air moves globally as a result of dynamical forcing. For example, migrating regions of low oxygen-to-nitrogen air are invariably found to correlate with high thermospheric temperatures. As well, GUVI obtained altitudinal-latitudinal (limb) images of temperature and composition, which show how the disturbances vary at different heights. The ASPEN thermospheric global circulation model was used to test our understanding of these remarkable images. The resulting simulations of thermospheric response show good agreement with GUVI data prior to the peak of the storm on 20 November. During the peak and recovery phases, serious discrepancies between data and model are seen. Although this initial attempt to model the storm is encouraging, much more detailed analysis is required, especially of the high-latitude inputs. The GUVI images demonstrate that far ultraviolet imaging is becoming a crucial component of space weather research and development. Meier, R.; Crowley, G.; Strickland, D.; Christensen, A.; Paxton, L.; Morrison, D.; Hackert, C.; Published by: Journal of Geophysical Research Published on: 09/2005 YEAR: 2005 DOI: 10.1029/2004JA010990 dayglow; geomagnetic storm; GUVI; remote sensing; thermospheric composition; TIMED |
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Paxton, LJ; Zhang, Y; Meier, R; Strickland, D; Christensen, A; Crowley, G; Kozyra, J; Published by: Published on: |
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Craven, JD; Christensen, AB; Meier, RR; Paxton, LJ; Strickland, DJ; Published by: Published on: |
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Curtis, N; Crowley, G; Meier, R; Strickland, DJ; Paxton, LJ; Christensen, A; Morrison, D; Published by: Published on: |
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Auroral-E electron density profiles to be derived from SESS particle data Evans, JS; Daniell, RE; Knight, H; Strickland, DJ; Rodriguez, JV; Published by: Published on: |
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Implications of Auroral Electron Precipitation During the JOULE Experiment Slocum, PL; Clemmons, JH; Hecht, JH; Larsen, MF; Pfaff, RF; Steigies, CT; Stenbaek-Nielsen, HC; Strickland, DJ; Published by: Published on: |
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Hecht, JH; Strickland, DJ; Knight, HK; Kochenash, AJ; Zhang, Y; Morrison, MD; Paxton, LJ; Mende, SB; Frey, HU; Burke, WJ; , others; Published by: Published on: |
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Vertical Structure of the Thermosphere and Ionosphere During Geomagnetic Storms in May 2002 Daniell, RE; Burns, AG; Strickland, DJ; Meier, RR; Paxton, LJ; Published by: Published on: |
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Meier, RR; Crowley, G; Strickland, DJ; Christensen, AB; Paxton, LJ; Morrison, D; Hackert, CL; Published by: Journal of Geophysical Research-Part A-Space Physics Published on: |
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Global Thermosphere-Ionosphere Response To Storms Crowley, G; Hackert, C; Meier, R; Paxton, L; Strickland, DJ; Zhang, Y; Pi, X; Manucci, A; Christensen, A; Morrison, D; Published by: Published on: |
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Knight, HK; Strickland, DJ; Kochenash, AJ; Hecht, JH; Morrison, D; Zhang, Y; Paxton, LJ; Burke, WJ; Rich, FJ; Published by: Published on: |
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E-Layer Variations During an X-Class Flare Inferred from Far Ultraviolet Dayglow Observations Strickland, D.; Daniell, R.; Meier, R.; Lean, J.; Published by: Published on: |
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E-Layer Variations During X-Class Flares Inferred from Far Ultraviolet Dayglow Observations A study is reported that addresses dayglow and ionospheric response to X-class flares that occurred on Oct 28 and Nov 4 2003. Data of interest are 1) the dayglow observations by GUVI and solar EUV/X-ray observations by SEE (both on NASA\textquoterights TIMED satellite), 2) E-region measurements made by the EISCAT radar (on Oct 28) located at Troms\o, Norway, and 3) E-region/F-region IOX GPS occultation measurements (on Nov 4). The timing of the flares was fortunate in that TIMED was on the dayside portion of its orbit when activity peaked for both flares. During the Oct 28 flare, the EISCAT measurements were made near local noon under low geomagnetic activity conditions. Key results are the modeled and measured preflare and flare E-region electron densities. The basis of the modeled densities is QEUV, an integrated measure of solar EUV/XUV energy flux from 0 to 45 nm (that portion of the irradiance spectrum responsible for far ultraviolet dayglow). Use is made of spectra from SEE and the NRLEUV model along with GUVI nadir dayglow observations within its 135.6 and LBHS spectral channels to derive preflare and flare QEUV. The GUVI data are used to derive QEUV with the use of lookup tables, each distinguished by solar EUV/X-ray spectral shape, not by magnitude. Lookup tables have been produced using SEE and NRLEUV flare and preflare spectral shapes. The AURIC model is used to calculate the E-layer with the key input being a solar spectrum with a given shape (those discussed above) and magnitude (set by QEUV). The two sets of ionospheric measurements on their respective flare days show increases in NmE (E-layer peak density) by approximately a factor of three. The QEUV-based NmE agrees well with the measurements before and during these flares. NmE based on SEE spectra, on the other hand, exceeds the observed values, especially during the flares. The favorable agreement supports the derived GUVI QEUV values and argues for a significant reduction in SEE energy fluxes during periods of eruptive solar activity. Strickland, D.~J.; Daniell, R.~E.; Meier, R.~R.; Lean, J.~L.; Straus, P.~R.; Morrison, M.~D.; Paxton, L.; Published by: AGU Fall Meeting Abstracts Published on: 2479 Solar radiation and cosmic ray effects; 7519 Flares; 7549 Ultraviolet emissions; 7974 Solar effects |
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Global Thermosphere-Ionosphere Response to Geomagnetic Storms Crowley, G.; Hackert, C.; Meier, R.; Strickland, D.; Paxton, L.; Pi, X.; Manucci, A.; Christensen, A.; Morrison, D.; Bust, G.; Roble, R.; Curtis, N.; Published by: Published on: |
| 2004 |
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Quiet-time seasonal behavior of the thermosphere seen in the far ultraviolet dayglow The TIMED/GUVI instrument is a far ultraviolet spectrograph that obtains images in five spectrally resolved wavelength channels. These images yield information on the dayside composition, temperature, solar EUV flux, large-scale wave structures, and auroral processes. In this paper we present an overview analysis of Earth-disk images for four seasons (March, July, and September 2002 and January 2003). Days were selected during geomagnetically quiet periods when the Sun was nearly in the orbital plane (noon orbits). Two of GUVI\textquoterights five channels (designated as 135.6 and LBHS and dominated by OI 135.6 nm and short wavelength N2 LBH band emission, respectively) are used when the instrument is in its imaging mode. These data are used to derive O/N2 (column density ratio referenced to an N2 column density of 1017 cm-2). The AURIC model is used to generate a lookup table that relates O/N2 to the ratio of 135.6 to LBHS for a given solar zenith angle. Global images of derived O/N2 (designated as GUVI O/N2) are presented for the 4 days. The initial validation of the retrieved composition ratio comes from comparison with the NRLMSIS model. Good overall qualitative agreement is obtained between GUVI and NRLMSIS. Both data and model exhibit similar latitudinal behaviors on the near-solstice days, namely a distinct gradient with O/N2 decreasing from the winter to the summer hemisphere. Reductions in O/N2 in the vicinity of magnetic poles are seen in both GUVI and NRLMSIS images. Globally, O/N2 is smaller at the solstices and may be explained by the \textquotedblleftthermospheric spoon\textquotedblright mechanism discussed by Fuller-Rowell [1998]. Alternatively, the greater overall values at the equinoxes may arise in part from global response to greater Joule heating at these times of the year. The sensitivity of O/N2 to scalings of the N2 LBH cross section and solar EUV below 20 nm is also addressed in response to recent papers on these topics. This initial look at the GUVI data demonstrates great promise of FUV remote sensing as a way to observe thermospheric composition changes over broad geographic scales. Strickland, D.; Meier, R.; Walterscheid, R.; Christensen, A.; Paxton, L.; Morrison, D.; Craven, J.; Crowley, G.; Published by: Journal of Geophysical Research Published on: 01/2004 YEAR: 2004 DOI: 10.1029/2003JA010220 far ultraviolet; remote sensing; seasonal behavior; thermosphere |
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IMAGE-FUV observations of the October-November 2003 flare and magnetic storm effects on Earth Immel, TT; Ostgaard, N; Strickland, DJ; Frey, HU; Mende, SB; Lu, G; Published by: Published on: |
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Lookup tables for transionospheric effects on signals Strickland, DJ; Barnes, RP; Kochenash, AJ; Jones, WA; Reilly, MH; Daniell, RE; Published by: Radio Science Published on: |
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Hecht, JH; Strickland, DJ; Conde, MG; Morrison, MD; Published by: Published on: |
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The Interaction of Auroral Electron Precipitation with the Thermosphere During the JOULE Experiment Slocum, PL; Clemmons, JH; Hecht, JH; Pfaff, RF; Steigies, CT; Larsen, MF; Strickland, DJ; Published by: Published on: |
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Effect of The October-November 2003 Super-storms On Thermospheric Density and Composition Crowley, G; Tapley, B; Bettadpur, S; Cheng, M; Paxton, LJ; Zhang, Y; Morrison, D; Christensen, A; Meier, R; Strickland, DJ; Published by: Published on: |
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Global Thermosphere-Ionosphere Response to the October-November 2003 Storms Bronn, J; Crowley, G; Hackert, C; Meier, R; Paxton, L; Strickland, D; Christensen, A; Morrison, D; Zhang, Y; Straus, P; , others; Published by: Published on: |
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Looking at the November 20, 2003 super storm with TIMED/GUVI: Comparison with the TIMEGCM Meier, RR; Crowley, G; Strickland, DJ; Christensen, A; Paxton, L; Morrison, D; Published by: Published on: |
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