A Compact Dual-Polarized 4-Port Eleven Feed with High Sensitivity for Reflectors over 0.35-1.05 GHz [PDF]
, 2015 We present significant improvements to the circular Eleven feed technology for a dual-reflector system operating over 0.35-1.05 GHz as a backup for the square kilometer array (SKA) project Band 1.
Billade, Bhushan +6 more
core +1 more source
Earth, Planets and SpaceIrregularities in the Earth’s rotation speed are quantified by the difference between Universal Time (UT1) and Coordinated Universal Time (UTC).
Arnab Laha +6 more
doaj +1 more source
On the Integration of VLBI Observations to GENESIS into Global VGOS Operations
Remote SensingThe upcoming European Space Agency (ESA) satellite mission GENESIS is an Earth-orbiting satellite carrying instruments of all four space geodetic techniques.
David Schunck +2 more
doaj +1 more source
Perspectives for Thermochemical Conversions of Lignocellulosic Biomass
Small, Volume 20, Issue 39, September 26, 2024.The status of the thermochemical conversion processes of lignocellulosic biomass within the areas of research and development is presented and discussed. A lot of insight and understanding related to the thermochemical conversion of lignocellulosic biomass is already gained, however, there are still a number of challenges and obstacles to be overcome ...
Michael Stöcker
wiley +1 more source
Prototype System for Unmanned Reference Point Determination at the Sub‐Millimeter Level
Earth and Space ScienceThe determination of reference points for telescopes is crucial for obtaining the local‐tie vector for a multi‐technology co‐located station. Traditional methods suffer from labor‐intensive fieldwork, long execution cycles, and systematic errors due to ...
Zhibin Zhang +7 more
doaj +1 more source
International VLBI Service for Geodesy and Astrometry 2014 Annual Report [PDF]
IVS is an international collaboration of organizations which operate or support Very Long Baseline Interferometry (VLBI) components. The goals are: 1.
Armstrong, Kyla L. +2 more
core +1 more source
Mechanistic Insight into Heteroatom Removal from Vacuum Gas Oil Blended with PMMA or PET Waste
ChemSusChem, Volume 17, Issue 15, August 12, 2024.Examining Vacuum Gas Oil (VGO) and hydrocracking products blended with polymethylmethacrylate (PMMA) or polyethylene terephthalate (PET) reveals intricate oxygen, nitrogen, and sulfur removal pathways. Using advanced analytical methods, we elucidate the impact of the addition of oxygenated plastics on heteroatom‐removal reactions, establishing new ...
Naydu Zambrano +6 more
wiley +1 more source
RFI Mitigation and Testing Employed at GGAO for NASA's Space Geodesy Project (SGP) [PDF]
Radio Frequency Interference (RFI) Mitigation at Goddard Geophysical and Astronomical Observatory (GGAO) has been addressed in three different ways by NASA's Space Geodesy Project (SGP); masks, blockers, and filters.
Bulcha, Berhanu +4 more
core +2 more sources
Revealing two radio active galactic nuclei extremely near PSR J0437$-$4715
, 2018 Newton's gravitational constant $G$ may vary with time at an extremely low level. The time variability of $G$ will affect the orbital motion of a millisecond pulsar in a binary system and cause a tiny difference between the orbital period-dependent ...
An, Tao +11 more
core +1 more source
Assessment of Parameters Describing the Signal Delay in the Neutral Atmosphere Derived from VGOS Observations [PDF]
, 2023 We use the VGOS session VR2101 to assess\ua0parameters describing the signal delay in the neutral\ua0atmosphere. VGOS results are compared to corresponding\ua0results derived from co-located GNSS stations\ua0for all sites, and additionally to results ...
Diamantidis, Periklis +4 more
core