10.5880/GFZ.1.1.2018.001 eng dataset GFZ German Research Centre for Geosciences datapub@gfz-potsdam.de http://www.gfz-potsdam.de Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences Helmholtz-Centre Potsdam - GFZ German Research Centre for Geosciences pointOfContact 2025-02-26 urn:ogc:def:crs:EPSG:4326 Closure Plots for "Source Structure and Measurement Noise Are as Important as All Other Residual Sources in Geodetic VLBI Combined" 2025-02-26 revision 2018-06-13 creation doi:10.5880/GFZ.1.1.2018.001 Anderson, James M. GFZ German Research Centre for Geosciences, Potsdam, Germany author Xu, Ming H. Shanghai Astronomical Observatory, Shanghai Shi, China author GFZ Data Services publisher Plots of closure delay, closure phase, and closure amplitude are provided for the geodetic very long baseline interferometry (VLBI) observations of the Continuous VLBI Campaign 2014 (CONT14) experiment of the International VLBI Service for Geodesy and Astrometry (IVS, https://ivscc.gsfc.nasa.gov/ , see https://ivscc.gsfc.nasa.gov/program/cont14/ for a description of CONT14, and see https://ivscc.gsfc.nasa.gov/about/org/components/dc-list.html for a list of IVS data centers from which the CONT14 data can be downloaded) as calculated by Anderson and Xu for their article titled _Source Structure and Measurement Noise Are as Important as All Other Residual Sources in Geodetic VLBI Combined_, submitted to the Journal of Geophysical Research - Solid Earth in 2018. Closure quantities are insensitive to station-based calibration terms, such as station clock errors, atmospheric delay errors, phase offsets, station position errors, amplitude calibration errors, and so on, and as a result are sensitive only to source structure (the two-dimensional brightness distribution of source emission on the sky, which is typically time and frequency dependent), measurement noise, and closure errors such as bandpass mismatch and polarization leakage. We used closure quantities derived from the CONT14 data to investigate the amount of source structure present in the celestial sources observed in the CONT14 experiment. Details: Three data files are included: (1) closure_delay_Anderson_Xu_JGR_2018.tar.gz (2) closure_phase_Anderson_Xu_JGR_2018.tar.gz (3) closure_amplitude_Anderson_Xu_JGR_2018.tar.gz The file with the name starting with "closure_delay" contains closure delay plots, the file with the name starting with "closure_phase" contains closure phase plots, and so on. These three files are collections of files made by the UNIX tar program that have been compressed with the gzip program. Complete Anderson, James M. GFZ German Research Centre for Geosciences, Potsdam, Germany anderson@gfz-potsdam.de pointOfContact Xu, Ming H. Shanghai Astronomical Observatory, Shanghai Shi, China mhxu@shao.ac.cn pointOfContact very long baseline interferometry VLBI International VLBI Service for Geodesy and Astrometry IVS closure delay closure phase closure amplitude source structure Continuous VLBI Campaign 2014 CONT14 measurement noise statistical analysis residual errors EARTH SCIENCE > SOLID EARTH > GEODETICS SPACE SCIENCE > ASTROPHYSICS > EXTRAGALACTIC ASTRONOMY NASA/GCMD Earth Science Keywords publication Solar/Space Observing Instruments > Radio Wave Detectors > VLBI GCMD Instruments publication CC BY 4.0 CC BY 4.0 10.5880/GFZ.1.1.2015.002 DOI IsDerivedFrom https://ivscc.gsfc.nasa.gov/program/cont14 URL References https://ivscc.gsfc.nasa.gov/about/org/components/dc-list.html URL References 10.1029/2018JB015550 DOI IsSupplementTo eng geoscientificInformation All sky coverage --- not related to ground goverage -180 180 -90 90 2014-05-06 2014-05-21 http://doi.org/10.5880/GFZ.1.1.2018.001 WWW:LINK-1.0-http--link Data Access - DOI Data Access - DOI information