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The global thermospheric and ionospheric response to the 2008 minor sudden stratospheric warming event.
Published in:
Journal of Geophysical Research. Space Physics, 2012, v. 117, n. A10, p. n/a, doi. 10.1029/2012JA018018
By:
- Korenkov, Y. N.;
- Klimenko, V. V.;
- Klimenko, M. V.;
- Bessarab, F. S.;
- Korenkova, N. A.;
- Ratovsky, K. G.;
- Chernigovskaya, M. A.;
- Shcherbakov, A. A.;
- Sahai, Y.;
- Fagundes, P. R.;
- Jesus, R.;
- Abreu, A. J.;
- Condor, P.
Publication type:
Article
Atypical nighttime spread- F structure observed near the southern crest of the ionospheric equatorial ionization anomaly.
Published in:
Journal of Geophysical Research. Space Physics, 2012, v. 117, n. A4, p. n/a, doi. 10.1029/2011JA017118
By:
- Fagundes, P. R.;
- Bittencourt, J. A.;
- Abreu, A. J.;
- Moor, L. P.;
- Muella, M. T. A. H.;
- Sahai, Y.;
- Abalde, J. R.;
- Pezzopane, M.;
- Sobral, J. H. A.;
- Abdu, M. A.;
- Pimenta, A. A.;
- Amorim, D. C. M.
Publication type:
Article
Equatorial ozone characteristics as measured at Natal (5.9°S, 35.2°W).
Published in:
Journal of Geophysical Research. Oceans, 1983, v. 88, n. C11, p. 6812, doi. 10.1029/JC088iC11p06812
By:
- Kirchhoff, V. W. J. H.;
- Hilsenrath, E.;
- Motta, A. G.;
- Sahai, Y.;
- Medrano-B, R. A.
Publication type:
Article
Ionospheric plasma blobs observed by OI 630 nm all-sky imaging in the Brazilian tropical sector during the major geomagnetic storm of April 6-7, 2000.
Published in:
Geophysical Research Letters, 2007, v. 34, n. 2, p. n/a, doi. 10.1029/2006GL028529
By:
- Pimenta, A. A.;
- Sahai, Y.;
- Bittencourt, J. A.;
- Rich, F. J.
Publication type:
Article
First observations of detached equatorial ionospheric plasma depletions using OI 630.0 nm and OI 777.4 nm emissions nightglow imaging.
Published in:
Geophysical Research Letters, 2006, v. 33, n. 11, p. 1, doi. 10.1029/2005GL025262
By:
- Sahai, Y.;
- Abalde, J. R.;
- Fagundes, P. R.;
- Pillat, V. G.;
- Bittencourt, J. A.
Publication type:
Article
Plasma blobs observed by ground-based optical and radio techniques in the Brazilian tropical sector.
Published in:
Geophysical Research Letters, 2004, v. 31, n. 12, p. n/a, doi. 10.1029/2004GL020233
By:
- Pimenta, A. A.;
- Sahai, Y.;
- Bittencourt, J. A.;
- Abdu, M. A.;
- Takahashi, H.;
- Taylor, M. J.
Publication type:
Article
Zonal velocity of the equatorial plasma bubbles over Kolhapur, India.
Published in:
Annales Geophysicae (ANGEO) (09927689), 2013, v. 31, n. 11, p. 2077, doi. 10.5194/angeo-31-2077-2013
By:
- Nade, D. P.;
- Sharma, A. K.;
- Nikte, S. S.;
- Patil, P. T.;
- Ghodpage, R. N.;
- Rokade, M. V.;
- Gurubaran, S.;
- Taori, A.;
- Sahai, Y.
Publication type:
Article
Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21-22 January 2005.
Published in:
Annales Geophysicae (ANGEO) (09927689), 2011, v. 29, n. 5, p. 919, doi. 10.5194/angeo-29-919-2011
By:
- Sahai, Y.;
- Fagundes, P. R.;
- de Jesus, R.;
- Abreu, A. J. de;
- Crowley, G.;
- Kikuchi, T.;
- Huang, C.-S.;
- Pillat, V. G.;
- Guarnieri, F. L.;
- Abalde, J. R.;
- Bittencourt, J. A.
Publication type:
Article
Performance Study of Direct Borohydride Fuel Cells Employing Polyvinyl Alcohol Hydrogel Membrane and Nickel-Based Anode.
Published in:
Fuel Cells, 2011, v. 11, n. 5, p. 603, doi. 10.1002/fuce.201000125
By:
- Ma, J.;
- Choudhury, N. A.;
- Sahai, Y.;
- Buchheit, R. G.
Publication type:
Article
Maximum entropy spectral analysis of total ozone: Errata.
Published in:
1985
By:
- Kane, R.;
- Sahai, Y.;
- Teixeira, N.
Publication type:
Correction Notice
Maximum entropy spectral analysis of total ozone.
Published in:
Pure & Applied Geophysics, 1984, v. 122, n. 5, p. 747, doi. 10.1007/BF01101879
By:
- Kane, R.;
- Sahai, Y.;
- Teixeira, N.
Publication type:
Article
Low-latitude total ozone measurements in the Brazilian sector.
Published in:
Pure & Applied Geophysics, 1982, v. 120, n. 4, p. 615, doi. 10.1007/BF00876647
By:
- Sahai, Y.;
- Kane, R.;
- Teixeira, N.
Publication type:
Article
Effect of transverse distribution of secondary cooling water on corner cracks in wide thick slab continuous casting process.
Published in:
Ironmaking & Steelmaking, 2014, v. 41, n. 5, p. 360, doi. 10.1179/1743281213Y.0000000161
By:
- Ji, C.;
- Cai, Z. Z.;
- Wang, W. L.;
- Zhu, M. Y.;
- Sahai, Y.
Publication type:
Article
Thermospheric Meridional Wind Control on Equatorial Scintillations and the Role of the Evening F-Region Height Rise, E × B Drift Velocities and F2-Peak Density Gradients.
Published in:
Surveys in Geophysics, 2010, v. 31, n. 5, p. 509, doi. 10.1007/s10712-010-9101-3
By:
- Muella, M. T. A. H.;
- de Paula, E. R.;
- Fagundes, P. R.;
- Bittencourt, J. A.;
- Sahai, Y.
Publication type:
Article
Total ozone trends in the tropics.
Published in:
Journal of Geophysical Research. Atmospheres, 2000, v. 105, n. D15, p. 19823, doi. 10.1029/2000JD900001
By:
- Sahai, Y.;
- Kirchhoff, V. W. J. H.;
- Lerne, N. M. Paes;
- Casiccia, C.
Publication type:
Article
Latitude dependence of the quasi-biennial oscillation and quasi-triennial oscillation characteristics of total ozone measured by TOMS.
Published in:
Journal of Geophysical Research. Atmospheres, 1998, v. 103, n. D7, p. 8477, doi. 10.1029/97JD03651
By:
- Kane, R. P.;
- Sahai, Y.;
- Casiccia, C.
Publication type:
Article
Observations of the 1995 ozone hole over Punta Arenas, Chile.
Published in:
Journal of Geophysical Research. Atmospheres, 1997, v. 102, n. D13, p. 16109, doi. 10.1029/97JD00276
By:
- Kirchhoff, V. W. J. H.;
- Sahai, Y.;
- Casiccia, C. A. R. S.;
- Zamorano, B. F.;
- Valderrama, V. V.
Publication type:
Article
Observations of optical emissions from precipitation of energetic neutral atoms and ions from the ring current.
Published in:
Journal of Geophysical Research. Space Physics, 1983, v. 88, n. A8, p. 6317, doi. 10.1029/JA088iA08p06317
By:
- Rohrbaugh, R. P.;
- Tinsley, B. A.;
- Rassoul, H.;
- Sahai, Y.;
- Teixeira, N. R.;
- Tull, R. G.;
- Doss, D. R.;
- Cochran, A. L.;
- Cochran, W. D.;
- Barker, E. S.
Publication type:
Article
Comment on 'Airglow observations of the OI 7774-Å multiplet at Arecibo during a magnetic storm' by Roger G. Burnside, John W. Meriwether, and James C. G. Walker.
Published in:
Journal of Geophysical Research. Space Physics, 1981, v. 86, n. A6, p. 4839, doi. 10.1029/JA086iA06p04839
By:
- Sahai, Y.;
- Bittencourt, J. A.;
- Teixeira, N. R.
Publication type:
Article
Plasma irregularities in the tropical F-region detected by OI 7774 Å and 6300 Å nightglow measurements.
Published in:
Journal of Geophysical Research. Space Physics, 1981, v. 86, n. A5, p. 3496, doi. 10.1029/JA086iA05p03496
By:
- Sahai, Y.;
- Bittencourt, J. A.;
- Teixeira, N. R.;
- Takahashi, H.
Publication type:
Article
Simultaneous observations of OI 7774-Å and [OI] 6300-Å emissions and correlative study with ionospheric parameters.
Published in:
Journal of Geophysical Research. Space Physics, 1981, v. 86, n. A5, p. 3657, doi. 10.1029/JA086iA05p03657
By:
- Sahai, Y.;
- Bittencourt, J. A.;
- Teixeira, N. R.;
- Takahashi, H.
Publication type:
Article
Low-Latitude Mesosphere, Thermosphere, and Ionosphere.
Published in:
International Journal of Geophysics, 2012, p. 1, doi. 10.1155/2012/671240
By:
- Sahai, Y.;
- Dabas, R. S.;
- Otsuka, Y.;
- Klimenko, M.
Publication type:
Article
Energetic oxygen precipitation as a source of vibrationally excited N<sub>2</sub><sup>+</sup> in emissions observed at low latitudes.
Published in:
Geophysical Research Letters, 1982, v. 9, n. 5, p. 543, doi. 10.1029/GL009i005p00543
By:
- Tinsley, B. A.;
- Rohrbaugh, R. P.;
- Sahai, Y.;
- Teixeira, N. R.
Publication type:
Article
First ozone profiles measured with ECC sondes at Natal (5.9°S, 35.2°W).
Published in:
Geophysical Research Letters, 1981, v. 8, n. 11, p. 1171, doi. 10.1029/GL008i011p01171
By:
- Kirchhoff, V. W. J. H.;
- Sahai, Y.;
- Motta, A. G.
Publication type:
Article
F layer postsunset height rise due to electric field prereversal enhancement: 1. Traveling planetary wave ionospheric disturbance effects.
Published in:
Journal of Geophysical Research. Space Physics, 2009, v. 114, n. A12, p. n/a, doi. 10.1029/2009JA014390
By:
- Fagundes, P. R.;
- Bittencourt, J. A.;
- Abalde, J. R.;
- Sahai, Y.;
- Bolzan, M. J. A.;
- Pillat, V. G.;
- Lima, W. L. C.
Publication type:
Article
F layer postsunset height rise due to electric field prereversal enhancement: 2. Traveling planetary wave ionospheric disturbances and their role on the generation of equatorial spread F.
Published in:
Journal of Geophysical Research. Space Physics, 2009, v. 114, n. A12, p. n/a, doi. 10.1029/2009JA014482
By:
- Fagundes, P. R.;
- Abalde, J. R.;
- Bittencourt, J. A.;
- Sahai, Y.;
- Francisco, R. G.;
- Pillat, V. G.;
- Lima, W. L. C.
Publication type:
Article
Effects observed in the Latin American sector ionospheric F region during the intense geomagnetic disturbances in the early part of November 2004.
Published in:
Journal of Geophysical Research. Space Physics, 2009, v. 114, n. A3, p. n/a, doi. 10.1029/2007JA013007
By:
- Sahai, Y.;
- Becker-Guedes, F.;
- Fagundes, P. R.;
- de Jesus, R.;
- de Abreu, A. J.;
- Paxton, L. J.;
- Goncharenko, L. P.;
- Brunini, C.;
- Gende, M.;
- Ferreira, A. S.;
- Lima, N. S.;
- Guarnieri, F. L.;
- Pillat, V. G.;
- Bittencourt, J. A.;
- Candido, C. M. N.
Publication type:
Article
Effects observed in the ionospheric F region in the east Asian sector during the intense geomagnetic disturbances in the early part of November 2004.
Published in:
Journal of Geophysical Research. Space Physics, 2009, v. 114, n. A3, p. n/a, doi. 10.1029/2008JA013053
By:
- Sahai, Y.;
- Becker-Guedes, F.;
- Fagundes, P. R.;
- de Jesus, R.;
- de Abreu, A. J.;
- Otsuka, Y.;
- Shiokawa, K.;
- Igarashi, K.;
- Yumoto, K.;
- Huang, C.-S.;
- Lan, H. T.;
- Saito, A.;
- Guarnieri, F. L.;
- Pillat, V. G.;
- Bittencourt, J. A.
Publication type:
Article
Observations of GW/TID oscillations in the F2 layer at low latitude during high and low solar activity, geomagnetic quiet and disturbed periods.
Published in:
Journal of Geophysical Research. Space Physics, 2009, v. 114, n. A2, p. n/a, doi. 10.1029/2008JA013448
By:
- Klausner, V.;
- Fagundes, P. R.;
- Sahai, Y.;
- Wrasse, C. M.;
- Pillat, V. G.;
- Becker-Guedes, F.
Publication type:
Article
Thermospheric dark band structures observed in all-sky OI 630 nm emission images over the Brazilian low-latitude sector.
Published in:
Journal of Geophysical Research. Space Physics, 2008, v. 113, n. A1, p. n/a, doi. 10.1029/2007JA012444
By:
- Pimenta, A. A.;
- Kelley, M. C.;
- Sahai, Y.;
- Bittencourt, J. A.;
- Fagundes, P. R.
Publication type:
Article
Response of the equatorial ionosphere at dusk to penetration electric fields during intense magnetic storms.
Published in:
Journal of Geophysical Research. Space Physics, 2007, v. 112, n. A8, p. n/a, doi. 10.1029/2006JA012192
By:
- Basu, S.;
- Basu, Su.;
- Rich, F. J.;
- Groves, K. M.;
- MacKenzie, E.;
- Coker, C.;
- Sahai, Y.;
- Fagundes, P. R.;
- Becker-Guedes, F.
Publication type:
Article
Observations of F layer electron density profiles modulated by planetary wave type oscillations in the equatorial ionospheric anomaly region.
Published in:
Journal of Geophysical Research. Space Physics, 2005, v. 110, n. A12, p. n/a, doi. 10.1029/2005JA011115
By:
- Fagundes, P. R.;
- Pillat, V. G.;
- Bolzan, M. J. A.;
- Sahai, Y.;
- Becker-Guedes, F.;
- Abalde, J. R.;
- Aranha, S. L.;
- Bittencourt, J. A.
Publication type:
Article
Effects of the major geomagnetic storms of October 2003 on the equatorial and low-latitude F region in two longitudinal sectors.
Published in:
Journal of Geophysical Research. Space Physics, 2005, v. 110, n. A12, p. n/a, doi. 10.1029/2004JA010999
By:
- Sahai, Y.;
- Fagundes, P. R.;
- Becker-Guedes, F.;
- Bolzan, M. J. A.;
- Abalde, J. R.;
- Pillat, V. G.;
- de Jesus, R.;
- Lima, W. L. C.;
- Crowley, G.;
- Shiokawa, K.;
- MacDougall, J. W.;
- Lan, H. T.;
- Igarashi, K.;
- Bittencourt, J. A.
Publication type:
Article
Height-resolved ionospheric drifts at low latitudes from simultaneous OI 777.4 nm and OI 630.0 nm imaging observations.
Published in:
Journal of Geophysical Research. Space Physics, 2004, v. 109, n. A11, p. n/a, doi. 10.1029/2004JA010560
By:
- Abalde, J. R.;
- Fagundes, P. R.;
- Sahai, Y.;
- Pillat, V. G.;
- Pimenta, A. A.;
- Bittencourt, J. A.
Publication type:
Article
Observations of equatorial F region plasma bubbles using simultaneous OI 777.4 nm and OI 630.0 nm imaging: New results.
Published in:
Journal of Geophysical Research. Space Physics, 2001, v. 106, n. A12, p. 30331, doi. 10.1029/2001JA001115
By:
- Abalde, J. R.;
- Fagundes, P. R.;
- Bittencourt, J. A.;
- Sahai, Y.
Publication type:
Article
Imaging observations of midlatitude ionospheric disturbances during the geomagnetic storm of February 12, 2000.
Published in:
Journal of Geophysical Research. Space Physics, 2001, v. 106, n. A11, p. 24481, doi. 10.1029/2000JA900169
By:
- Sahai, Y.;
- Shiokawa, K.;
- Otsuka, Y.;
- Ihara, C.;
- Ogawa, T.;
- Igarashi, K.;
- Miyazaki, S.;
- Saito, A.
Publication type:
Article
Determination of the quenching rate of the O(¹D) by O(³P) from rocket-borne optical (630 nm) and electron density data.
Published in:
Journal of Geophysical Research. Space Physics, 1993, v. 98, n. A5, p. 7791, doi. 10.1029/92JA01839
By:
- Sobral, J. H. A.;
- Takahashi, H.;
- Abdu, M. A.;
- Muralikrishna, P.;
- Sahai, Y.;
- Zamlutti, C. J.;
- Paula, E. R.;
- Batista, P. P.
Publication type:
Article
Comment on 'Nighttime Na D emission observed from a polar-orbiting DMSP satellite' by A. L. Newman.
Published in:
Journal of Geophysical Research. Space Physics, 1990, v. 95, n. A5, p. 6601, doi. 10.1029/JA095iA05p06601
By:
- Clemesha, B. R.;
- Sahai, Y.;
- Simonich, D. M.;
- Takahashi, H.
Publication type:
Article
Equatorial particle precipitation during magnetic storms and relationship to equatorial thermospheric heating.
Published in:
Journal of Geophysical Research. Space Physics, 1988, v. 93, n. A1, p. 270, doi. 10.1029/JA093iA01p00270
By:
- Tinsley, B. A.;
- Sahai, Y.;
- Biondi, M. A.;
- Meriwether, J. W.
Publication type:
Article
Low-latitude aurorae and storm time current systems.
Published in:
Journal of Geophysical Research. Space Physics, 1986, v. 91, n. A10, p. 11257, doi. 10.1029/JA091iA10p11257
By:
- Tinsley, B. A.;
- Rohrbaugh, R.;
- Rassoul, H.;
- Sahai, Y.;
- Teixeira, N. R.;
- Slater, D.
Publication type:
Article
Seasonal variations of mesospheric hydrogen and ozone concentrations derived from ground-based airglow and lidar observations.
Published in:
Journal of Geophysical Research. Atmospheres, 1992, v. 97, n. D5, p. 5987, doi. 10.1029/91JD03015
By:
- Takahashi, H.;
- Clemesha, B. R.;
- Sahai, Y.;
- Batista, P. P.;
- Simonich, D. M.
Publication type:
Article
The annual variation of the height of the atmospheric sodium layer at 23°S: possible evidence for convective transport.
Published in:
Journal of Geophysical Research. Atmospheres, 1992, v. 97, n. D5, p. 5981, doi. 10.1029/91JD03146
By:
- Clemesha, B. R.;
- Simonich, D. M.;
- Takahashi, H.;
- Batista, P. P.;
- Sahai, Y.
Publication type:
Article

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