83 citations · 231 across the 10 of their papers we have counts for
10 papers
A Drone-mounted Magnetometer System for Automatic Interference Removal and Landmine Detection
Alex Paul Hoffmann, Matthew G. Finley, Eftyhia Zesta +2
Landmines have been extensively used in conflict zones as an indiscriminate weapon to control military movements, often remaining active long after hostilities have ended. Their pr…
Tracking Reentries of Starlink Satellites During the Rising Phase of Solar Cycle 25
Denny M. Oliveira, Eftyhia Zesta, Katherine Garcia-Sage
The exponential increase of low-Earth orbit (LEO) satellites in the past 5 years has brought into intense focus the need for reliable monitoring and reentry prediction to safeguard…
The 10 October 2024 geomagnetic storm may have caused the premature reentry of a Starlink satellite
Denny M. Oliveira, Eftyhia Zesta, Dibyendu Nandy
In this short communication, we qualitatively analyze possible effects of the 10 October 2024 geomagnetic storm on accelerating the reentry of a Starlink satellite from very low-Ea…
First direct observations of interplanetary shock impact angle effects on actual geomagnetically induced currents: The case of the Finnish natural gas pipeline system
Denny M. Oliveira, Eftyhia Zesta, Sergio Vidal-Luengo
The impact of interplanetary (IP) shocks on the Earth's magnetosphere can greatly disturb the geomagnetic field and electric currents in the magnetosphere-ionosphere system. At hig…
Semiclassical limit problems with concurrent use of several clocks in quantum cosmology
Bruno Alexandre, João Magueijo
We revisit a recent proposal for a definition of time in quantum cosmology, to investigate the effects of having more than one possible type of clock "at the same time". We use as…
The current state and future directions of modeling thermosphere density enhancements during extreme magnetic storms
Denny M. Oliveira, Eftyhia Zesta, Piyush M. Mehta +4
Satellites, crewed spacecraft and stations in low-Earth orbit (LEO) are very sensitive to atmospheric drag. A satellite's lifetime and orbital tracking become increasingly inaccura…
Estimating Satellite Orbital Drag During Historical Magnetic Superstorms
Denny M. Oliveira, Eftyhia Zesta, Hisashi Hayakawa +1
Understanding extreme space weather events is of paramount importance in efforts to protect technological systems in space and on the ground. Particularly in the thermosphere, the…
A possible case of sporadic aurora observed at Rio de Janeiro
Denny M. Oliveira, Hisashi Hayakawa, Ankush Bhaskar +2
Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar-terrestrial environments.…
Satellite orbital drag during magnetic storms
Denny M. Oliveira, Eftyhia Zesta
We investigate satellite orbital drag effects at low-Earth orbit (LEO) associated with thermosphere heating during magnetic storms caused by coronal mass ejections. CHAllenge Mini-…
Ionosphere-thermosphere global time response to geomagnetic storms
D. M. Oliveira, E. Zesta, P. W. Schuck +2
In this study, we investigate thermospheric neutral mass density heating associated with 168 CME-driven geomagnetic storms in the period of May 2001 to September 2011. We use neutr…