Upgrading a synthetic seismicity model for more realistic fault ruptures

Upgrading the frequency resolution of spectrum analyzers for radio-astronomy due to exploiting a multi-phonon light scattering in TeO2 crystalline modulators

Upper Limits of Stratospheric IO And OIO Inferred From Center to Limb Darkening Corrected Balloon-Borne Solar Occultation Visible Spectra; Implications For Total Gaseous Iodine And Stratospheric Ozone

Upper limits on gamma-ray burst repetition

Upper limits on spacecraft-induced ultraviolet emissions from the Space Shuttle (STS-61C)

Upper Limits on the Mass of Supermassive Black Holes from Archival Data of the Space Telescope Imaging Spectrograph

Upper mantle structure beneath continents: New constraints from multi-mode Rayleigh wave data in western North America and southern Africa

Upper stage options for reusable launch vehicle ``pop-up'' missions

Upper-air balloon-borne observations in Portugal

Upper-atmosphere studies by ranging to satellites

Upscale effects in simulations of tropical convection on an equatorial beta-plane

Upscaling water cycle parameters using geomorphometric terrain parameters and topographic indices derived from interferometric DEM

Upstream conditions at Mercury during the first MESSENGER flyby: Results from two independent solar wind models

Upstream Cyclotron Waves from Venus Express Observations

Upward electron beams measured by DE-1 - A primary source of dayside region-1 Birkeland currents

Urban Climatological Parameters Derived from ERS-1 &LANDSAT-TM Multisensor Data

Urban green spaces: Modern heritage

Urban texture analysis

Urey onboard Exomars: Searching for life on Mars

Urinalysis by surface-enhanced Raman spectroscopy