Bibliography

Canary: Ion spectroscopy for ionospheric sensing

Feldmesser, HS; Darrin, MAG; Osiander, R; Paxton, LJ; Rogers, AQ; Marks, JA; McHarg, MG; Balthazor, RL; Krause, LH; FitzGerald, JG;

Published by:       Published on:

YEAR: 2010     DOI:

Unique Science Needs: CAWSES-II and Virtual Observatories

Kozyra, JU; Fox, PA; Avery, SK; Rodger, AS; Melkers, JE; Paxton, LJ; Barnes, RJ;

Published by:       Published on:

YEAR: 2009     DOI:

Gyroless-extending the TIMED mission

The TIMED spacecraft is now it its eighth year of a two-year mission, amassing an unprecedented, uninterrupted collection of upper atmospheric data. Over the course of this time, degradation of the gyros has forced the need to allow operation without them. As a result, the attitude estimation algorithms have been enhanced to allow continued operation under gyroless conditions. This paper describes the algorithms implemented to perform attitude estimation with a tracker-only solution, as well as operational issues encountered with a gyroless spacecraft. On-orbit performance is presented, demonstrating the ability to maintain pointing performance requirements with these new algorithms.

Dellinger, Wayne;

Published by:       Published on:

YEAR: 2009     DOI: 10.2514/6.2009-5948

Effects observed in the Latin American sector ionospheric F region during the intense geomagnetic disturbances in the early part of November 2004

Sahai, Y; Becker-Guedes, F; Fagundes, PR; De Jesus, R; De Abreu, AJ; Paxton, LJ; Goncharenko, LP; Brunini, C; Gende, M; Ferreira, AS; , others;

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

YEAR: 2009     DOI:

Assessment of ionospheric measurement techniques in support of space weather requirements

Erlandson, RE; Paxton, LJ; Kelly, MA; Rogers, AQ; Zanetti, LJ;

Published by:       Published on:

YEAR: 2009     DOI:

MRO/CRISM observations of Phobos and Deimos

Murchie, SL; Choo, T; Humm, D; Rivkin, AS; Bibring, J-P; Langevin, Y; Gondet, B; Roush, TL; Duxbury, T; team, CRISM; , others;

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YEAR: 2008     DOI:

The PECOS mission of small space weather satellites in the post DMSP era

de La Beaujardiere, O; Hanscom, AFB; Rich, FJ; Cooke, DA; Mozer, J; Ober, D; Huang, C; Gentile, LC;

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YEAR: 2008     DOI:

Astronomical sky spectra from the 29–31 October 2003 geomagnetic superstorms: Observations of O+(2Do–4So) and other emissions

High-resolution spectra of the night sky at near-equatorial latitudes have been obtained with the Ultraviolet and Visual Echelle Spectrograph on the 8.2 m Kueyen telescope, European Southern Observatory, Cerro Paranal, Chile, during the 29–31 October 2003 geomagnetic superstorms. These spectra show indications of both thermospheric and ionospheric disturbance. Numerous emission features observed in these spectra have behaviors that correlate with the negative magnitude of the disturbance storm time index (Dst), a measure of the ring current influence on equatorial magnetic field strength. Specifically, the intensity of the optically forbidden and rarely observed O+(2Do–4So) doublet lines at 372.6 and 372.9 nm increases with decreasing Dst and have profiles that often possess unusual morphology. Also observed on nights with strong geomagnetic activity is sustained emission after twilight from both the N2+ first negative system 0-0 band at 391.4 nm and the He(3p3Po–2s3S) 388.9 nm line. The intensities of permitted neutral oxygen lines nominally arising from electron radiative recombination are suppressed during active periods relative to levels measured during quiescent periods. The pattern of emission in these spectra may reflect the manifestation of a variety of storm time phenomena, including negative ionospheric storms, energetic neutral auroras, and stable auroral red arcs, and indicates substantial energy deposition at high altitudes.

Sharpee, B.; Neill, E.; Slanger, T.;

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

YEAR: 2008     DOI: https://doi.org/10.1029/2007JA013010

spectra; geomagnetic; storm

First terrestrial soft X-ray auroral observation by the Chandra X-ray Observatory

Bhardwaj, Anil; Gladstone, Randall; Elsner, Ronald; Ostgaard, Nikolai; Waite, Hunter; Cravens, Thomas; Chang, Shen-Wu; Majeed, Tariq; Metzger, Albert;

Published by: Journal of Atmospheric and Solar-Terrestrial Physics      Published on: Jan-02-2007

YEAR: 2007     DOI: 10.1016/j.jastp.2006.07.011

Using Satellite Measurements to Evaluate Clouds And Their Seasonal Variations in 10 Atmospheric General Circulation Models

Zhang, M; Lin, W; Klein, S; Backmeister, J; Bony, S; Cederwall, R; Del Genio, A; Hack, J; Loeb, N; Lohmann, U; , others;

Published by:       Published on:

YEAR: 2007     DOI:

Correction of SOHO CELIAS/SEM EUV measurements saturated by extreme solar flare events

Didkovsky, LV; Judge, DL; Jones, AR; Wieman, S; Tsurutani, BT; McMullin, D;

Published by: Astronomische Nachrichten: Astronomical Notes      Published on:

YEAR: 2007     DOI:

Vertical variations in the N2 mass mixing ratio during a thermospheric storm that have been simulated using a coupled magnetosphere-ionosphere-thermosphere model

Burns, AG; Wang, W; Killeen, TL; Solomon, SC; Wiltberger, M;

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

YEAR: 2006     DOI:

Global patterns of Joule heating in the high-latitude ionosphere

A compiled empirical global Joule heating (CEJH) model is described in this study. This model can be used to study Joule heating patterns, Joule heating power, potential drop, and polar potential size in the high-latitude ionosphere and thermosphere, and their variations with solar wind conditions, geomagnetic activities, the solar EUV radiation, and the neutral wind. It is shown that the interplanetary magnetic field (IMF) orientation and its magnitude, the solar wind speed, AL index, geomagnetic K_p index, and solar radio flux F_10.7 index are important parameters that control Joule heating patterns, Joule heating power, potential drop, and polar potential size. Other parameters, such as the solar wind number density (N_sw) and Earth\textquoterights dipole tilt, do not significantly affect these quantities. It is also shown that the neutral wind can increase or reduce the Joule heating production, and its effectiveness mainly depends on the IMF orientation and its magnitude, the solar wind speed, AL index, K_p index, and F_10.7 index. Our results indicate that for less disturbed solar wind conditions, the increase or reduction of the neutral wind contribution to the Joule heating is not significant compared to the convection Joule heating, whereas under extreme solar wind conditions, the neutral wind can significantly contribute to the Joule heating. Application of the CEJH model to the 16 July 2000 storm implies that the model outputs are basically consistent with the results from the AMIE mapping procedure. The CEJH model can be used to examine large-scale energy deposition during disturbed solar wind conditions and to study the dependence of the hemispheric Joule heating on the level of geomagnetic activities and the intensity of solar EUV radiation. This investigation enables us to predict global Joule heating patterns for other models in the high-latitude ionosphere and thermosphere in the sense of space weather forecasting.

Zhang, X.; Wang, C.; Chen, T.; Wang, Y.; Tan, A.; Wu, T.; Germany, G.; Wang, W.;

Published by: Journal of Geophysical Research      Published on: 12*2005

YEAR: 2005     DOI: 10.1029/2005JA011222

electric fields; magnetosphere/ionosphere interaction; Modeling and forecasting; particle precipitation; polar cap ionosphere; solar radiation and cosmic ray effects

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

Thermospheric density structures over the polar regions observed with CHAMP

Schlegel, Kristian; Lühr, Hermann; St-Maurice, J-P; Crowley, Geoff; Hackert, Chris;

Published by:       Published on:

YEAR: 2005     DOI:

Spacecraft Attitude Determination

By spacecraft attitude, we mean how a spacecraft is oriented in space. Every spacecraft carries a complement of instruments, usually called a payload, that must be directed in some way

Shuster, Malcolm; Dellinger, Wayne;

Published by: Fundamentals of Space Systems      Published on:

YEAR: 2005     DOI:

Thermospheric Response to Solar EUV during Quiet and Flare Conditions

Solomon, SC; Qian, L; Gladstone, GR; Bailey, SM; Rodgers, EM;

Published by:       Published on:

YEAR: 2005     DOI:

Violent Sun-Earth connection events of October-November 2003: Violent Sun-Earth connection events of October-November 2003

Tsurutani, BT; Judge, DL; Meier, RR; Immel, TJ; Woods, TN;

Published by: Geophysical research letters      Published on:

YEAR: 2005     DOI:

Radar studies of the dynamics of the mesosphere and lower thermosphere

This thesis describes studies made using two modern VHF meteor radars. The first was installed at Esrange (68 N, 21 E) in Arctic Sweden in October 1999. The second was deployed

Younger, Peter;

Published by:       Published on:

YEAR: 2004     DOI:

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 the corresponding solar EUV energy estimated by the NRLEUV irradiance variability model. The QEUVGUVI values do not support recent suggestions that the solar EUV irradiances estimated by the model of Hinteregger et al. be increased by a factor of four, nor even a factor of two.

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

Oxygen atom Rydberg emission in the equatorial ionosphere from radiative recombination

Slanger, TG; Cosby, PC; Huestis, DL; Meier, RR;

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

YEAR: 2004     DOI:

Advanced technology and mission operations concepts employed on NASA s TIMED mission

Yee, Jeng-Hwa; Rodberg, Elliot; Harvey, Raymond; Kusnierkiewicz, David; Knopf, William; Grunberger, Paul; Grant, David; Cameron, Glen;

Published by:       Published on:

YEAR: 2003     DOI:

Comparisons of Solar EUV Irradiance Variations from Measurements, Models and GUVI Terrestrial Far Ultraviolet Dayglow Observations

Lean, JL; Strickland, DJ; Meier, RR; Christensen, AB; Woods, TN; Eparvier, FG; McMullin, D; Judge, DL;

Published by:       Published on:

YEAR: 2003     DOI:

A Comparison of FUV Auroral Emissions During the April 2002 Events as seen by the IMAGE/FUV and TIMED/GUVI Instruments

Gladstone, G; Retherford, K; Solomon, S; Gerard, J; Hubert, Beno\^\it; Meurant, M; Paxton, L; Wolven, B; Zhang, Yinghong; Morrison, D; , others;

Published by:       Published on:

YEAR: 2002     DOI:

TIMED Observations of the Signatures of Magnetic Activity in the MLTI Region placed into Global Context by ACE, POLAR, IMAGE, SAMPEX, FAST, NOAA/POES, and DMSP

Kozyra, JU; Liemohn, MW; Mlynczak, MG; Paxton, LJ; Skinner, WR; Baker, DN; Cattell, CA; Germany, GA; Mende, SB; Pollock, CJ;

Published by:       Published on:

YEAR: 2002     DOI:

KARAKTERISERING VAN PERIODIEK DROOGVALLENDE BEEKJES LN HET STROOMGEBIED VAN DE LUNTERSE BEEK AAN DE HAND VAN DE MAKROFAUNA; AANZET TOT BEHEER.

LANDBOUWHOGESCHOOL, WAGENINGEN; GEBRUIK, GEGEVENS; OVERLEG, OVERNAME; DE PROJECTLEIDER, MET;

Published by:       Published on:

YEAR: 1985     DOI:

KARAKTERISERING VAN PERIODIEK DROOGVALLENDE BEEKJES LN HET STROOMGEBIED VAN DE LUNTERSE BEEK AAN DE HAND VAN DE MAKROFAUNA; AANZET TOT BEHEER.

LANDBOUWHOGESCHOOL, WAGENINGEN; GEBRUIK, GEGEVENS; OVERLEG, OVERNAME; DE PROJECTLEIDER, MET;

Published by:       Published on:

YEAR: 1985     DOI: