Results 41 to 50 of about 27,573 (245)
Polarization calibration techniques for the new-generation VLBI [PDF]
Astronomy & Astrophysics, 2020 The calibration and analysis of polarization observations in very long baseline interferometry (VLBI) requires the use of specific algorithms that suffer from several limitations, closely related to assumptions in the data properties that may not hold in
I. Martí-Vidal +4 more
semanticscholar +1 more source
Ray tracing-based delay model for compensating gravitational deformations of VLBI radio telescopes
Journal of Geodetic Science, 2022 The precision and the reliability of very long baseline interferometry (VLBI) depend on several factors. Apart from fabrication discrepancies or meteorological effects, gravity-induced deformations of the receiving unit of VLBI radio telescopes are ...
Lösler Michael +6 more
doaj +1 more source
, 2023 Over the past years VLBI data processing in CASA has become a reality. It is now a supported alternative to AIPS for EVN continuum observations and has established itself as one of the two official calibration pipelines for the EHT.
Kettenis, Mark
core +1 more source
No need for special VLBI hardware?
, 2023 Apart from the VLBA, all other VLBI networks around the world utilise radio telescopes (single dishes or arrays) built and operated as single instruments.
Tzioumis, Anastasios
core +1 more source
, 2015 Ray-traced delays offer the opportunity to correct the influences of the troposphere on observations of space geodetic applications such as Very Long Baseline Interferometry (VLBI).
Hofmeister, Armin +2 more
core +4 more sources
Comparison of VLBI and GNSS common view for time transfer
International Journal of Metrology and Quality Engineering, 2019 With the rapid development of optical clock, the stability and system uncertainty of optical clocks has reached a 1.0e–18 level. Optical clocks will likely constitute the next generation of time-frequency standards for redefining the SI second.
Wang Pingli +4 more
doaj +1 more source
Rotation of Earth and determination of Earth orientation parameters [PDF]
Geodetski Glasnik, 2015 Earth's rotation and elements of the Earth's orientation, with emphasis on the determination of the parameters of the Earth's orientation were described.
Mirko Borisov +2 more
doaj +1 more source
GPU-Based Parallel Implementation of VLBI Correlator for Deep Space Exploration System
Remote Sensing, 2021 Very Long Baseline Interferometry (VLBI) solution can yield accurate information of angular position, and has been successfully used in the field of deep space exploration, such as astrophysics, imaging, detector positioning, and so on.
Fan Zhang +4 more
doaj +1 more source
Publications of the Astronomical Society of the Pacific, 2020 Extensive least-squares wavelet and cross-wavelet analyses are performed on the Very Long Baseline Interferometry (VLBI) baseline length and temperature time series for a network of four VLBI antennas located in different continents.
Ebrahim Ghaderpour
semanticscholar +1 more source
rPICARD: A CASA-based calibration pipeline for VLBI data [PDF]
Astronomy & Astrophysics, 2019 Context. The Common Astronomy Software Application (CASA) software suite, which is a state-of-the-art package for radio astronomy, can now reduce very long baseline interferometry (VLBI) data with the recent addition of a fringe fitter. Aims.
M. Janssen +10 more
semanticscholar +1 more source