Bibliography

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Found 28 entries in the Bibliography.

Showing entries from 1 through 28

2012

An empirical determination of proton auroral far ultraviolet emission efficiencies using a new nonclimatological proton flux extrapolation method

Knight, HK; Strickland, DJ; Correira, J; Hecht, JH; Straus, PR;

Published by: Journal of Geophysical Research: Space Physics Published on:

YEAR: 2012 DOI:

2009

The Remote Atmospheric and Ionospheric Detection System on the ISS: Sensor performance and space weather applications from the extreme to the near ultraviolet

Stephan, Andrew; Budzien, Scott; Bishop, Rebecca; Straus, Paul; Christensen, Andrew; Hecht, James; Van Epps, Zachary;

Published by: Published on:

YEAR: 2009 DOI:

Near Infrared Spectroscopy and Photometry of the Thermosphere from the RAIDS Experiment on the International Space Station

Christensen, AB; Bishop, RL; Budzien, SA; Hecht, JH; Stephan, AW; Straus, PR; van Epps, Z;

Published by: Published on:

YEAR: 2009 DOI:

2008

Evidence for significantly greater N2 Lyman-Birge-Hopfield emission efficiencies in proton versus electron aurora based on analysis of coincident DMSP SSUSI and SSJ/5 data

Knight, HK; Strickland, DJ; Hecht, JH; Straus, PR; Morrison, D; Paxton, LJ; Evans, DS;

Published by: Journal of Geophysical Research: Space Physics Published on:

YEAR: 2008 DOI:

2007

Constraining and validating the Oct/Nov 2003 X-class EUV flare enhancements with observations of FUV dayglow and E -region electron densities

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

GPS Occultation Measurements of Post-Sunset E-Region Conductivity

Straus, PR; Bishop, R; Crowley, G;

Published by: Published on:

YEAR: 2007 DOI:

Constraining and validating the Oct/Nov 2003 X-class EUV flare enhancements with observations of FUV dayglow and E-region electron densities

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:

YEAR: 2007 DOI:

2006

Measurements of the E-and F-Region Post-Sunset Ionosphere

Straus, PR; Bishop, R; Crowley, G;

Published by: Published on:

YEAR: 2006 DOI:

Variations in the midlatitude and equatorial ionosphere during the October 2003 magnetic storm

two chains of ground GPS receivers, data from the ROCSAT satellite, and Thermosphere, Ionosphere, Mesosphere Energetics and Dynamics (TIMED) Global Ultraviolet Imager (GUVI)

Garner, TW; Bust, GS; , Gaussiran; Straus, PR;

Published by: Radio science Published on:

YEAR: 2006 DOI:

2005

The October 28, 2003 extreme EUV solar flare and resultant extreme ionospheric effects: Comparison to other Halloween events and the Bastille Day event

Some of the most intense solar flares measured in 0.1 to 0.8 nm x-rays in recent history occurred near the end of 2003. The Nov 4 event is the largest in the NOAA records (X28) and the Oct 28 flare was the fourth most intense (X17). The Oct 29 flare was class X7. These flares are compared and contrasted to the July 14, 2000 Bastille Day (X10) event using the SOHO SEM 26.0 to 34.0 nm EUV and TIMED SEE 0.1\textendash194 nm data. High time resolution, \~30s ground-base GPS data and the GUVI FUV dayglow data are used to examine the flare-ionosphere relationship. In the 26.0 to 34.0 nm wavelength range, the Oct 28 flare is found to have a peak intensity greater than twice that of the Nov 4 flare, indicating strong spectral variability from flare-to-flare. Solar absorption of the EUV portion of the Nov 4 limb event is a possible cause. The dayside ionosphere responds dramatically (\~2.5 min 1/e rise time) to the x-ray and EUV input by an abrupt increase in total electron content (TEC). The Oct 28 TEC ionospheric peak enhancement at the subsolar point is \~25 TECU (25 \texttimes 10¹² electrons/cm²) or 30\% above background. In comparison, the Nov 4, Oct 29 and the Bastille Day events have \~5\textendash7 TECU peak enhancements above background. The Oct 28 TEC enhancement lasts \~3 hrs, far longer than the flare duration. This latter ionospheric feature is consistent with increased electron production in the middle altitude ionosphere, where recombination rates are low. It is the EUV portion of the flare spectrum that is responsible for photoionization of this region. Further modeling will be necessary to fully understand the detailed physics and chemistry of flare-ionosphere coupling.

Tsurutani, B.; Judge, D.; Guarnieri, F.; Gangopadhyay, P.; Jones, A.; Nuttall, J.; Zambon, G.A.; Didkovsky, L.; Mannucci, A.J.; Iijima, B.; Meier, R.; Immel, T.J.; Woods, T.; Prasad, S.; Floyd, L.; Huba, J.; Solomon, S.; Straus, P.; Viereck, R.;

Published by: Geophysical Research Letters Published on: 02/2005

YEAR: 2005 DOI: 10.1029/2004GL021475

Calibration/Validation of the SSUSI Instrument on DMSP F16: Overview \& Nightside Analysis

Straus, PR; Paxton, LJ; DeMajistre, R; Morrison, D;

Published by: Published on:

YEAR: 2005 DOI:

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:

YEAR: 2005 DOI:

2479 Solar radiation and cosmic ray effects; 7519 Flares; 7549 Ultraviolet emissions; 7974 Solar effects

2004

GPS Occultation Sensor Contributions to Studies of the Equatorial Ionosphere

Straus, PR; Crowley, G; Anderson, PC;

Published by: Published on:

YEAR: 2004 DOI:

Observations of the Ionospheric and Thermospheric Response During the October and November 2003 Storms

Paxton, L; Crowley, G; Zhang, Y; DeMajistre, R; Kil, H; Morrison, D; Wolven, B; Straus, P; Christensen, A;

Published by: Published on:

YEAR: 2004 DOI:

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:

YEAR: 2004 DOI:

Far Ultraviolet Imaging of the low-Latitude Nightside Ionosphere with the GUVI Instrument on TIMED

Paxton, LJ; Kil, H; DeMajistre, R; Morrison, D; Straus, P; Talaat, E; Christensen, A; Wolven, B; Zhang, Y; Crowley, G; , others;

Published by: Published on:

YEAR: 2004 DOI:

2003

Automatic Detection of Equatorial Plasma Bubbles in GUVI Data

Henderson, S; Swenson, C; Straus, P; Kil, H; Christensen, A; Paxton, L; Morrison, D; Crowley, G; Meier, R; Craven, J; , others;

Published by: Published on:

YEAR: 2003 DOI:

GPS occultation sensor observations of ionospheric scintillation

We present the first globally distributed set of observations of radiowave scintillation by a GPS occultation sensor, the Ionospheric Occultation Experiment on board the PICOSat satellite.

Straus, PR; Anderson, PC; Danaher, JE;

Published by: Geophysical research letters Published on:

YEAR: 2003 DOI:

Results from CHAMP, SAC/C and IOXGPS ionospheric occultations obtained by the Abel Inversion and data assimilation

No Slide Title Page 1 Results from CHAMP, SAC/C and IOX GPS Ionospheric Occultations Obtained by the Abel Inversion and Data Assimilation Lukas Mandrake, JPL George Hajj, JPL

Mandrake, Lukas; Hajj, George; Iijima, Byron; Pi, Xiaoqing; Rosen, Gary; Straus, Paul; Wang, Chunming; Wilson, Brian;

Published by: Published on:

YEAR: 2003 DOI:

Search for thermospheric composition changes in the morning sector near local midnight in association with intense substorm activity

Craven, JD; Strickland, DJ; Meier, RR; Crowley, G; Christensen, AB; Paxton, LJ; Morrison, D; Avery, SK; Meng, C; Straus, PR; , others;