Results 51 to 60 of about 348,356 (178)
Analytical method to find the optimal parameters for gas detectors based on correlation spectroscopy using a Fabry-Perot interferometer [PDF]
, 2007 Several designs of infrared sensors use a Fabry-Perot Interferometer (FPI) to modulate the incident light. In this work we analyse the particular case where the FPI fringes are matched with very well defined ro-vibrational absorption lines of a target ...
Rutt, Harvey N. +1 more
core +1 more source
PhotonicsThe detection and characterization of exoplanets are central topics in astronomy, and high-contrast imaging techniques such nulling interferometry, coronagraphs, and extreme adaptive optics (ExAO) are key tools for the direct detection of exoplanets ...
Ziming Guo +5 more
doaj +1 more source
Radio Science, Volume 61, Issue 9, September 2026.Abstract Trans‐ionospheric high frequency (HF: 3–30 MHz) response to atmospheric gravity waves (GWs) is studied in the middle‐latitude ionosphere in relation to thunderstorm activity. SuperDARN HF radar observations are compared against the model simulations to quantify the impact of GW‐generated medium‐scale traveling ionospheric disturbances (MSTID ...
S. Chakraborty +5 more
wiley +1 more source
Radio Science, Volume 61, Issue 9, September 2026.Abstract With the ongoing transition for geodetic Very Long Baseline Interferometry (VLBI) from the use of legacy S/X telescopes to the VLBI Global Observing System (VGOS), it is necessary to connect the new VGOS network to the existing legacy S/X telescopes.
Rebekka Handirk +10 more
wiley +1 more source
Quasi 6‐Day Wave Variability in the Thermosphere and Ionosphere: Observations and Modeling
Earth and Space Science, Volume 13, Issue 9, September 2026.Abstract Satellite observations of the upper mesosphere and lower thermosphere from TIMED‐SABER and ICON‐MIGHTI reveal a clear Quasi 6‐Day Wave (Q6DW) event in the winds and temperatures in this region. This Q6DW event persists across multiple data sets throughout the middle‐to‐upper thermosphere and the F‐region ionosphere, including GOLD disk ...
Oluwafisayo P. Owolabi +2 more
wiley +1 more source
European Physical Journal C: Particles and FieldsThe study of black hole shadows provides a powerful tool for testing the predictions of general relativity and exploring deviations from the standard Kerr metric in the strong gravitational field regime.
Temurbek Mirzaev +2 more
doaj +1 more source
Applied Optics, 2005 11 pages, submitted to Applied Optics 17 August 2004, accepted 2 June ...
openaire +3 more sources
Journal of Geophysical Research: Space Physics, Volume 131, Issue 9, September 2026.Abstract The neutral wind dynamo generates ionospheric currents that can significantly affect high‐latitude electrodynamics during geomagnetic storms, yet its role in global magnetosphere‐ionosphere coupling is often underrepresented. We quantify the impact of wind‐driven currents on geomagnetic disturbances (GMDs) and magnetospheric dynamics during ...
Yu Hong +4 more
wiley +1 more source
The use of liquid crystal adaptive optics devices in astronomy [PDF]
, 1991 Images obtained from large astronomical telescopes are distorted and blurred by the effects of the atmosphere. In order to compensate for this, an adaptive optics system can be incorporated downstream from the telescope focus.
Love, G.D, Love, Gordon D.
core
Geophysical Research Letters, Volume 53, Issue 15, 16 August 2026.Abstract The complex refractive index (CRI) of ice is one of the main parameters driving the optical properties of ice clouds and frozen surfaces, hence their climate impact. While already characterized at short wavelengths, ice CRI has never been measured across the infrared range at temperatures relevant to Earth.
Cecilia Taverna +6 more
wiley +1 more source