Results 31 to 40 of about 485,703 (257)

The LOFAR Long-Baseline Calibrator Survey Classification

open access: yesLatvian Journal of Physics and Technical Sciences, 2020
Abstract Data manipulation of the LOFAR Long-Baseline Calibrator Survey (LBCS) and the Westerbork Northern Sky Survey (WENSS) catalogues are carried out in the present study. The aim of the study is to make calibrator classification statistics plots and estimations for further observations and upcoming stations.
A. Nikolajevs, K. Prūsis
openaire   +1 more source

Error Correction of Water Vapor Radiometers for VLBI Observations in Deep-Space Networks

open access: yesAtmosphere, 2021
In this paper, we present the design and implementation tests of a water vapor radiometer (WVR) suitable for very long baseline interferometry (VLBI) observation.
Houcai Chen   +4 more
doaj   +1 more source

Development of the TanDEM-X Calibration Concept: Analysis of Systematic Errors [PDF]

open access: yes, 2010
The TanDEM-X mission, result of the partnership between the German Aerospace Center (DLR) and Astrium GmbH, opens a new era in spaceborne radar remote sensing. The first bistatic satellite synthetic aperture radar mission is formed by flying the TanDEM-
Bachmann, Markus   +3 more
core   +1 more source

Precise Determination of Calibration Baseline Distances

open access: yesJournal of Surveying Engineering, 2019
Some errors that affect the accuracy of electronic distance measurement (EDM) instruments can be determined in a laboratory, but most are detectable and measurable only on a calibration baseline on which distances are precisely determined. In this paper, precise distance determination is presented on the calibration baseline of the Faculty of Geodesy ...
Mladen Zrinjski   +2 more
openaire   +1 more source

Calibration and Emitters Selection Method of Interferometer Based on Single or Double Emitters [PDF]

open access: yesHangkong bingqi
The traditional method of joint calibration of fixed baseline interferometer with multiple errors requires more than three calibration emitters to achieve real-time calibration of the interferometer in orbit, but the performance of the traditional method
Song Yihao, Huang Puming, Liu Bo, Feng Xuefeng, Li Shuai, Zhang Qian
doaj   +1 more source

Overlapping-calibration of wide-swath altimeter baseline errors using two satellites formation flying design

open access: yesFrontiers in Marine Science, 2022
The sea surface height (SSH) measured by future wide-swath altimetry satellites contains observation error due to baseline measurement, which is called SSH_Error_Baseline.
Chunyong Ma   +8 more
doaj   +1 more source

Calibration of laser distance meter using Opto-Electronic oscillator

open access: yesResults in Optics, 2022
Laser-based Electronic Distance Meters (EDMs) are used extensively to measure inner/outer dimensions in constructions and large volumes. Therefore, it needs to be calibrated regularly to assure its proper function.
Karim Elglmady   +3 more
doaj   +1 more source

Instantaneous baseline damage localisation using sensor mapping [PDF]

open access: yes, 2016
In this paper an instantaneously recorded baseline method is proposed using piezoelectric transducers for damage localisation under varying temperature.
Aliabadi, MH   +2 more
core   +1 more source

Calibration of the passive cavity aerosol spectrometer probe for airborne determination of the size distribution [PDF]

open access: yesAtmospheric Measurement Techniques, 2013
This work describes calibration methods for the particle sizing and particle concentration systems of the passive cavity aerosol spectrometer probe (PCASP).
Y. Cai, J. R. Snider, P. Wechsler
doaj   +1 more source

Calibration of Stereo Pairs Using Speckle Metrology

open access: yesSensors, 2022
The accuracy of 3D reconstruction for metrology applications using active stereo pairs depends on the quality of the calibration of the system. Active stereo pairs are generally composed of cameras mounted on tilt/pan mechanisms separated by a constant ...
Éric Samson   +2 more
doaj   +1 more source

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