| Positive and negative GPS‐TEC ionospheric storm effects during the extreme space weather event of March 2015 over the Brazilian sector PR Fagundes, FA Cardoso, BG Fejer, K Venkatesh, BAG Ribeiro, ... Journal of Geophysical Research: Space Physics 121 (6), 5613-5625, 2016 | 126 | 2016 |
| Effects of the major geomagnetic storms of October 2003 on the equatorial and low‐latitude F region in two longitudinal sectors Y Sahai, PR Fagundes, F Becker‐Guedes, MJA Bolzan, JR Abalde, ... Journal of Geophysical Research: Space Physics 110 (A12), 2005 | 77 | 2005 |
| Observations of F layer electron density profiles modulated by planetary wave type oscillations in the equatorial ionospheric anomaly region PR Fagundes, VG Pillat, MJA Bolzan, Y Sahai, F Becker‐Guedes, ... Journal of Geophysical Research: Space Physics 110 (A12), 2005 | 71 | 2005 |
| Formation of ionospheric irregularities over Southeast Asia during the 2015 St. Patrick's Day storm L Spogli, C Cesaroni, D Di Mauro, M Pezzopane, L Alfonsi, E Musicò, ... Journal of Geophysical Research: Space Physics 121 (12), 12,211-12,233, 2016 | 70 | 2016 |
| IRI-2001 model predictions compared with ionospheric data observed at Brazilian low latitude stations F Bertoni, Y Sahai, WLC Lima, PR Fagundes, VG Pillat, F Becker-Guedes, ... Annales Geophysicae 24 (8), 2191-2200, 2006 | 63 | 2006 |
| Geomagnetic storm and equatorial spread-F F Becker-Guedes, Y Sahai, PR Fagundes, WLC Lima, VG Pillat, ... Annales Geophysicae 22 (9), 3231-3239, 2004 | 56 | 2004 |
| Ionospheric response to the 2009 sudden stratospheric warming over the equatorial, low, and middle latitudes in the South American sector PR Fagundes, LP Goncharenko, AJ De Abreu, K Venkatesh, ... Journal of Geophysical Research: Space Physics 120 (9), 7889-7902, 2015 | 53 | 2015 |
| Observations of daytime F2‐layer stratification under the southern crest of the equatorial ionization anomaly region PR Fagundes, V Klausner, Y Sahai, VG Pillat, F Becker‐Guedes, ... Journal of Geophysical Research: Space Physics 112 (A4), 2007 | 53 | 2007 |
| Observations of GW/TID oscillations in the F2 layer at low latitude during high and low solar activity, geomagnetic quiet and disturbed periods V Klausner, PR Fagundes, Y Sahai, CM Wrasse, VG Pillat, ... Journal of Geophysical Research: Space Physics 114 (A2), 2009 | 52 | 2009 |
| On the performance of the IRI‐2012 and NeQuick2 models during the increasing phase of the unusual 24th solar cycle in the Brazilian equatorial and low‐latitude sectors K Venkatesh, PR Fagundes, GK Seemala, R de Jesus, AJ de Abreu, ... Journal of Geophysical Research: Space Physics 119 (6), 5087-5105, 2014 | 50 | 2014 |
| Hemispheric asymmetries in the ionospheric response observed in the American sector during an intense geomagnetic storm AJ De Abreu, PR Fagundes, Y Sahai, R de Jesus, JA Bittencourt, ... Journal of Geophysical Research: Space Physics 115 (A12), 2010 | 45 | 2010 |
| Response of the ionospheric F-region in the Brazilian sector during the super geomagnetic storm in April 2000 observed by GPS AJ de Abreu, Y Sahai, PR Fagundes, F Becker-Guedes, R de Jesus, ... Advances in space research 45 (11), 1322-1329, 2010 | 42 | 2010 |
| F layer postsunset height rise due to electric field prereversal enhancement: 2. Traveling planetary wave ionospheric disturbances and their role on the generation of … PR Fagundes, JR Abalde, JA Bittencourt, Y Sahai, RG Francisco, ... Journal of Geophysical Research: Space Physics 114 (A12), 2009 | 40 | 2009 |
| Effects observed in the Latin American sector ionospheric F region during the intense geomagnetic disturbances in the early part of November 2004 Y Sahai, F Becker‐Guedes, PR Fagundes, R De Jesus, AJ De Abreu, ... Journal of Geophysical Research: Space Physics 114 (A3), 2009 | 40 | 2009 |
| The ionospheric response in the Brazilian sector during the super geomagnetic storm on 20 November 2003 F Becker-Guedes, Y Sahai, PR Fagundes, ES Espinoza, VG Pillat, ... Annales Geophysicae 25 (4), 863-873, 2007 | 37 | 2007 |
| Effects observed in the ionospheric F-region in the South American sector during the intense geomagnetic storm of 14 December 2006 R De Jesus, Y Sahai, FL Guarnieri, PR Fagundes, AJ de Abreu, ... Advances in space research 46 (7), 909-920, 2010 | 36 | 2010 |
| Studies of ionospheric F-region response in the Latin American sector during the geomagnetic storm of 21–22 January 2005 Y Sahai, PR Fagundes, R De Jesus, AJ De Abreu, G Crowley, T Kikuchi, ... Annales Geophysicae 29 (5), 919-929, 2011 | 35 | 2011 |
| A computational tool for ionosonde CADI's ionogram analysis VG Pillat, LNF Guimarães, PR Fagundes, JDS da Silva Computers & geosciences 52, 372-378, 2013 | 33 | 2013 |
| Effects observed in the ionospheric F region in the east Asian sector during the intense geomagnetic disturbances in the early part of November 2004 Y Sahai, F Becker‐Guedes, PR Fagundes, R de Jesus, AJ de Abreu, ... Journal of Geophysical Research: Space Physics 114 (A3), 2009 | 32 | 2009 |
| Height‐resolved ionospheric drifts at low latitudes from simultaneous OI 777.4 nm and OI 630.0 nm imaging observations JR Abalde, PR Fagundes, Y Sahai, VG Pillat, AA Pimenta, JA Bittencourt Journal of Geophysical Research: Space Physics 109 (A11), 2004 | 32 | 2004 |
