Search

Your search keyword '"Eparvier F"' showing total 20 results
Start Over Author "Eparvier F" Journal journal of geophysical research: space physics
20 results on '"Eparvier F"'

3. One-Hertz Waves at Mars: MAVEN Observations

Author

Ruhunusiri, Suranga, Halekas, J. S, Espley, J. R, Eparvier, F, Brain, D, Mazelle, C, Harada, Y, DiBraccio, G. A, Thiemann, E. M. B, Larson, D. E, Mitchell, D. L, Jakosky, B. M, and Sulaiman, A. H

Subjects
Lunar And Planetary Science And Exploration
Abstract

We perform a survey of 1-Hz waves at Mars utilizing Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft observations for a Martian year. We find that the 1-Hz wave occurrence rate shows an apparent variation caused by masking of the waves by background turbulence during the times when the background turbulence levels are high. To correct for this turbulence masking, we select waves that occur in time intervals where the background turbulence levels are low. We find that the extreme ultraviolet flux does not affect the wave occurrence rate significantly, suggesting that the newly born pickup ions originating in the Mars's exosphere contribute minimally to the 1-Hz wave generation. We find that the wave occurrence rates are higher for low Mach numbers and low beta values than for high Mach numbers and high beta values. Further, we find that a high percentage of 1-Hz waves satisfy the group-standing condition, which suggests that a high percentage of the waves seen as monochromatic waves in the spacecraft frame can be broadband waves in the solar wind frame that have group velocities nearly equal and opposite to the solar wind velocity. We infer that the wave occurrence rate trends with the Mach number and proton beta are a consequence of how the Mach numbers and beta values influence the wave generation and damping or how those parameters affect the group-standing condition. Finally, we find that the 1-Hz waves are equally likely to be found in both the quasi-parallel and the quasi-perpendicular foreshock regions.

Published
2018
Full Text
View/download PDF

5. Influence of the Solar Wind Dynamic Pressure on the Ion Precipitation: MAVEN Observations and Simulation Results

Author

Martinez, A., primary, Modolo, R., additional, Leblanc, F., additional, Chaufray, J. Y., additional, Witasse, O., additional, Romanelli, N., additional, Dong, Y., additional, Hara, T., additional, Halekas, J., additional, Lillis, R., additional, McFadden, J., additional, Eparvier, F., additional, Leclercq, L., additional, Luhmann, J., additional, Curry, S., additional, and Jakosky, B., additional

Published
2020
Full Text
View/download PDF

6. Initial Observations by the GOLD Mission

Author

Eastes, R. W., primary, McClintock, W. E., additional, Burns, A. G., additional, Anderson, D. N., additional, Andersson, L., additional, Aryal, S., additional, Budzien, S. A., additional, Cai, X., additional, Codrescu, M. V., additional, Correira, J. T., additional, Daniell, R. E., additional, Dymond, K. F., additional, England, S. L., additional, Eparvier, F. G., additional, Evans, J. S., additional, Foroosh, H., additional, Gan, Q., additional, Greer, K. R., additional, Karan, D. K., additional, Krywonos, A., additional, Laskar, F. I., additional, Lumpe, J. D., additional, Martinis, C. R., additional, McPhate, J. B., additional, Oberheide, J., additional, Siegmund, O. H., additional, Solomon, S. C., additional, Veibel, V., additional, and Woods, T. N., additional

Published
2020
Full Text
View/download PDF

7. Expansion and Shrinking of the Martian Topside Ionosphere

Author

Dubinin, E., primary, Fraenz, M., additional, Pätzold, M., additional, Woch, J., additional, McFadden, J., additional, Halekas, J. S., additional, Connerney, J. E. P., additional, Jakosky, B. M., additional, Eparvier, F., additional, Vaisberg, O., additional, and Zelenyi, L., additional

Published
2019
Full Text
View/download PDF

8. Variability of Precipitating Ion Fluxes During the September 2017 Event at Mars

Author

Martinez, A., primary, Leblanc, F., additional, Chaufray, J. Y., additional, Modolo, R., additional, Romanelli, N., additional, Curry, S., additional, Luhmann, J., additional, Lillis, R., additional, Hara, T., additional, McFadden, J., additional, Halekas, J., additional, Eparvier, F., additional, Larson, D., additional, Connerney, J., additional, Ma, Y. J., additional, Holmström, M., additional, Witasse, O., additional, and Jakosky, B., additional

Published
2019
Full Text
View/download PDF

13. MAVEN measured oxygen and hydrogen pickup ions: Probing the Martian exosphere and neutral escape

Author

Rahmati, A., primary, Larson, D. E., additional, Cravens, T. E., additional, Lillis, R. J., additional, Halekas, J. S., additional, McFadden, J. P., additional, Dunn, P. A., additional, Mitchell, D. L., additional, Thiemann, E. M. B., additional, Eparvier, F. G., additional, DiBraccio, G. A., additional, Espley, J. R., additional, Mazelle, C., additional, and Jakosky, B. M., additional

Published
2017
Full Text
View/download PDF

14. MAVEN observations of the solar cycle 24 space weather conditions at Mars

Author

Lee, C. O., primary, Hara, T., additional, Halekas, J. S., additional, Thiemann, E., additional, Chamberlin, P., additional, Eparvier, F., additional, Lillis, R. J., additional, Larson, D. E., additional, Dunn, P. A., additional, Espley, J. R., additional, Gruesbeck, J., additional, Curry, S. M., additional, Luhmann, J. G., additional, and Jakosky, B. M., additional

Published
2017
Full Text
View/download PDF

15. Structure, dynamics, and seasonal variability of the Mars‐solar wind interaction: MAVEN Solar Wind Ion Analyzer in‐flight performance and science results

Author

Halekas, J. S., primary, Ruhunusiri, S., additional, Harada, Y., additional, Collinson, G., additional, Mitchell, D. L., additional, Mazelle, C., additional, McFadden, J. P., additional, Connerney, J. E. P., additional, Espley, J. R., additional, Eparvier, F., additional, Luhmann, J. G., additional, and Jakosky, B. M., additional

Published
2017
Full Text
View/download PDF

16. Proton cyclotron waves occurrence rate upstream from Mars observed by MAVEN: Associated variability of the Martian upper atmosphere

Author

Romanelli, N., primary, Mazelle, C., additional, Chaufray, J. Y., additional, Meziane, K., additional, Shan, L., additional, Ruhunusiri, S., additional, Connerney, J. E. P., additional, Espley, J. R., additional, Eparvier, F., additional, Thiemann, E., additional, Halekas, J. S., additional, Mitchell, D. L., additional, McFadden, J. P., additional, Brain, D., additional, and Jakosky, B. M., additional

Published
2016
Full Text
View/download PDF

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

Author

Strickland, D. J., primary, Lean, J. L., additional, Daniell, R. E., additional, Knight, H. K., additional, Woo, W. K., additional, Meier, R. R., additional, Straus, P. R., additional, Woods, T. N., additional, Eparvier, F. G., additional, McMullin, D. R., additional, Christensen, A. B., additional, Morrison, D., additional, and Paxton, L. J., additional

Published
2007
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results