Results 61 to 70 of about 34,499 (138)
Sputtering Holes with Ion Beamlets [PDF]
, 1974 Ion beamlets of predetermined configurations are formed by shaped apertures in the screen grid of an ion thruster having a double grid accelerator system. A plate is placed downstream from the screen grid holes and attached to the accelerator grid.
Banks, B. A., Byers, D. C.
core +1 more source
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract At the end of its mission, the MESSENGER spacecraft's orbit intersected Mercury's nightside magnetic equator at low altitudes below 420 km, enabling the first in situ observations of this region, where the magnetic field strength is typically sub‐dipolar.
A. T. Cushen +5 more
wiley +1 more source
Laser wavelength selector and output coupler [PDF]
, 1970 Optical system eliminates displacement occurring when wavelengths are selected in multiple wavelength laser utilizing intracavity wavelength selection by first-order Littrow reflection of plane grating.
Hard, T. M.
core +1 more source
Contrail Observation Limitations Using Geostationary Satellites
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract Contrails are a significant contributor to aviation's climate impact with an effective radiative forcing similar to that from aviation's CO2 ${\text{CO}}_{2}$ emissions, yet large uncertainties remain. Many observational contrail studies rely on data from a single sensor, in recent years increasingly from a geostationary imager, accepting ...
Marlene V. Euchenhofer +4 more
wiley +1 more source
Microwave power transmission system wherein level of transmitted power is controlled by reflections from receiver [PDF]
, 1974 A microwave, wireless, power transmission system is described in which the transmitted power level is adjusted to correspond with power required at a remote receiving station.
Robinson, W. J., Jr.
core +1 more source
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract Transpolar arcs (TPAs) describe a subset of auroral emissions observed poleward of the Earth's main auroral ovals when the interplanetary magnetic field (IMF) is northward. These emissions are thought to align with a “wedge” of closed magnetic field lines extending to the high‐latitude boundary of the Earth's magnetosphere, where they are ...
Nawapat Kaweeyanun +8 more
wiley +1 more source
Numerical computation of three-dimensional blunt body flow fields with an impinging shock [PDF]
A time-marching finite-difference method was used to solve the compressible Navier-Stokes equations for the three-dimensional wing-leading-edge shock impingement problem.
Holst, T. L., Tannehill, J. C.
core +1 more source
, 1976 A system for remotely measuring vertical and horizontal winds present in discrete volumes of air at selected locations above the ground is described. A laser beam is optically focused in range by a telescope, and the output beam is conically scanned at ...
Cliff, W. C. +6 more
core +1 more source
Unraveling Jupiter's Enigmatic Ionosphere: Evidence of Magnetically‐Controlled Wind‐Driven Dynamics
Geophysical Research Letters, Volume 52, Issue 24, 28 December 2025.Abstract This study investigates the non‐solar trends and variability in Jupiter's sub‐auroral ionosphere from Pioneer, Voyager, Galileo, and Juno radio occultation electron density profiles. We show that these data are correlated with magnetic field geometry via primarily westward and equatorward thermospheric neutral winds driving field‐aligned ...
O. Agiwal +11 more
wiley +1 more source
Numerical simulation of ice growth on a MS-317 swept wing geometry [PDF]
An effort to develop a 3-D ice accretion modeling method was initiated. This first step towards creation of a complete aircraft icing simulation code builds on previously developed methods for calculating 3-D flow fields and particle trajectories ...
Bidwell, C. S., Potapczuk, M. G.
core +1 more source