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Found 24 entries in the Bibliography.
Showing entries from 1 through 24
| 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 ... 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 |
| 2014 |
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Attribution of interminima changes in the global thermosphere and ionosphere We present a statistical attribution analysis of the changes in global annual average thermospheric mass density and ionospheric total electron content (TEC) between the cycle 22/23 solar minimum (which occurred at epoch 1996.4) and the prolonged cycle 23/24 minimum (2008.8). The mass density data are derived from orbital drag, and the TEC data are derived from ground-based GPS receivers. The interminima change in mass density was -36\% relative to the 1996.4 yearly average. Considering each multiplicative forcing indepen ... Emmert, J.; McDonald, S.; Drob, D.; Meier, R.; Lean, J.; Picone, J.; Published by: Journal of Geophysical Research: Space Physics Published on: 08/2014 YEAR: 2014 DOI: 10.1002/2013JA019484 ionosphere total electron content; solar minimum; thermosphere mass density |
| 2012 |
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The highly variable solar extreme ultraviolet (EUV) radiation is the major energy input to the Earth\textquoterights upper atmosphere, strongly impacting the geospace environment, affecting satellite operations, communications, and navigation. The Extreme ultraviolet Variability Experiment (EVE) onboard the NASA Solar Dynamics Observatory (S ... Woods, T.; Eparvier, F.; Hock, R.; Jones, A.; Woodraska, D.; Judge, D.; Didkovsky, L.; Lean, J.; Mariska, J.; Warren, H.; McMullin, D.; Chamberlin, P.; Berthiaume, G.; Bailey, S.; Fuller-Rowell, T.; Sojka, J.; Tobiska, W.; Viereck, R.; Published by: Solar Physics Published on: 01/2012 YEAR: 2012 DOI: 10.1007/s11207-009-9487-6 |
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SAMI3 Simulations of Ionospheric Variability from 1996 to 2011
McDonald, SE; Lean, J; Huba, JD; Emmert, JT; Drob, DP; Siefring, CL; Meier, RR; Picone, J; Published by: Published on: |
| 2011 |
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Global and regional trends in ionospheric total electron content
Lean, J.; Emmert, J.; Picone, J.; Meier, R.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2010JA016378 |
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Ionospheric total electron content: Global and hemispheric climatology
Lean, J.; Meier, R.; Picone, J.; Emmert, J.; Published by: Journal of Geophysical Research Published on: Jan-01-2011 YEAR: 2011 DOI: 10.1029/2011JA016567 |
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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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Simulating Ionospheric Variability in the Descending Phase of Solar Cycle-23 using SAMI3
McDonald, SE; Lean, J; Huba, JD; Joyce, GR; Emmert, JT; Drob, DP; Stephan, AW; Siefring, CL; Meier, RR; Picone, J; Published by: Published on: |
| 2010 |
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Record-low thermospheric density during the 2008 solar minimum
Emmert, J.; Lean, J.; Picone, J.; Published by: Geophysical Research Letters Published on: Jan-06-2010 YEAR: 2010 DOI: 10.1029/2010GL043671 |
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Integrating the Sun-Earth System for the Operational Environment (ISES-OE)
Lean, J.; Huba, J.; McDonald, S.; Slinker, S.; Drob, D.; Emmert, J.; Meier, R.; Picone, J.; Joyce, G.; Krall, J.; Stephan, A.; Roach, K.; Knight, H.; Plunkett, S.; Wu, C.-C.; Wood, B.; Wang, Y.-M.; Howard, R.; Chen, J.; Bernhardt, P.; Fedder, J.; Published by: 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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Thermospheric densities derived from spacecraft orbits: Application to the Starshine satellites
Lean, J.; Picone, J.; Emmert, J.; Moore, G.; Published by: Journal of Geophysical Research Published on: Jan-01-2006 YEAR: 2006 DOI: 10.1029/2005JA011399 |
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Emmert, JT; Meier, RR; Picone, JM; Lean, JL; Christensen, AB; Published by: Journal of Geophysical Research Published on: YEAR: 2006 DOI: 10.1029/2005JA011495 |
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Thermospheric density 2002–2004: TIMED/GUVI dayside limb observations and satellite drag We use TIMED/GUVI dayside limb observations of thermospheric far ultraviolet (FUV) dayglow to infer height profiles of total mass density during the period 2002–2004. We compare these data with total mass density derived from drag-induced changes in the orbits of satellites with perigee heights ranging from 200 to 600 km. To accommodate sampling differences, we compute the ratio of observed total mass density, filtered on a 3-day timescale, to that predicted by the NRLMSISE-00 empirical model. The GUVI densities are in goo ... Emmert, JT; Meier, RR; Picone, JM; Lean, JL; Christensen, AB; Published by: Journal of Geophysical Research: Space Physics Published on: YEAR: 2006 DOI: https://doi.org/10.1029/2005JA011495 |
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Thermospheric density 2002—2004: TIMED/GUVI dayside limb observations and satellite drag
Emmert, JT; Meier, RR; Picone, JM; Lean, JL; Christensen, AB; Published by: Journal of Geophysical Research: Space Physics Published on: |
| 2005 |
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Emmert, JT; Meier, RR; Picone, JM; Lean, JL; 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 whe ... 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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Solar EUV Experiment (SEE): Mission overview and first results [1]\ The Solar EUV Experiment (SEE) is one of four scientific instruments on the NASA Thermosphere Ionosphere Mesosphere Energetics Dynamics (TIMED) spacecraft, which has been simultaneously observing the Sun and Earth\textquoterights upper atmosphere since January 2002. The SEE instrument measures the irradiance of the highly variable, solar extreme ultraviolet (EUV) radiation, one of the major energy sources for the upper atmosphere. The primary SEE data product is the solar spectral irradiances from 0.1 to 194 nm ... Woods, Thomas; Eparvier, Francis; Bailey, Scott; Chamberlin, Phillip; Lean, Judith; Rottman, Gary; Solomon, Stanley; Tobiska, Kent; Woodraska, Donald; Published by: Journal of Geophysical Research: Space Physics (1978\textendash2012) Published on: YEAR: 2005 DOI: 10.1029/2004JA010765 thermosphere; solar activity cycle; solar irradiance; ultraviolet emissions; solar effects |
| 2004 |
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Solar EUV irradiance variability derived from terrestrial far ultraviolet dayglow observations Remotely sensed ultraviolet emissions from the Earth s upper atmosphere are shown to mirror fluctuations in solar EUV irradiance during July 2002, including the overall increase and decrease as the Sun rotated, and episodic increases associated with multiple solar flares. The TIMED/GUVI dayglow observations are used to derive a new quantity, QEUVGUVI, which is a measure of integrated solar EUV electromagnetic energy shortward of 45 nm. Both the absolute QEUVGUVI values and their modulation by solar rotation agree well with t ... Strickland, D.J.; Lean, J.L.; Meier, R.R.; Christensen, A.B.; Paxton, L.J.; Morrison, D.; Craven, J.D.; Walterscheid, R.L.; Judge, D.L.; McMullin, D.R.; Published by: Geophysical research letters Published on: YEAR: 2004 DOI: 10.1029/2003GL018415 |
| 2003 |
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Lean, JL; Strickland, DJ; Meier, RR; Christensen, AB; Woods, TN; Eparvier, FG; McMullin, D; Judge, DL; Published by: Published on: |
| 2002 |
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Ionospheric and dayglow responses to the radiative phase of the Bastille Day flare
Meier, RR; Warren, HP; Nicholas, AC; Bishop, J; Huba, JD; Drob, DP; Lean, JL; Picone, JM; Mariska, JT; Joyce, G; , others; Published by: Geophysical research letters Published on: |
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Parameterizations of solar EUV irradiance variations for use in upper atmosphere density models
Lean, JL; Picone, JM; Mariska, JT; Warren, HP; Knowles, S; Bishop, J; Meier, RR; Published by: Advances in the Astronautical Sciences Published on: |
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