Results 1 to 10 of about 485,496 (123)

Testing and calibration of geodetic instruments [PDF]

Acta Montanistica Slovaca, 2007
The problem of testing, verification and calibration of length-scales (electronic rangefinders) and angle-scales (geodetic instruments). The calibration of coded levelling rods and the systemic calibration of digital levelling instruments.
Marek Bajtala, Štefan Sokol, Ján Ježko   +2 more
doaj   +2 more sources

Enhanced calibration method for wall-mounted RGSC cameras: Mitigating baseline drift caused by CT couch sagging. [PDF]

PLoS ONE
PurposeThe drift signal due to CT couch sagging introduces intrinsic noise into respiratory signals, impairing the accuracy of tumor motion management.
Jiangtao Wang, Jinyou Hu, Xiangxiang Liu, Dashuang Luo, Yisong He, Lian Zou   +5 more
doaj   +2 more sources

Calibration of cause-specific absolute risk for external validation using each cause-specific hazards model in the presence of competing events [PDF]

Diagnostic and Prognostic Research
Background When developing/validating prognostic models, it is typical to assess calibration between predicted and observed risks — either in the development dataset or in an external sample.
Sarwar I. Mozumder, Sarah Booth, Richard D. Riley, Mark J. Rutherford, Paul C. Lambert   +4 more
doaj   +2 more sources

Baseline Calibration of L-Band Spaceborne Bistatic SAR TwinSAR-L for DEM Generation

Remote Sensing, 2023
The Terrain Wide-swath Interferometric L-band Synthetic Aperture Radar (TwinSAR-L) mission is a spaceborne bistatic synthetic aperture radar (SAR) mission to derive a high-quality global digital elevation model (DEM).
Jingwen Mou, Yu Wang, Jun Hong, Yachao Wang, Aichun Wang   +4 more
doaj   +1 more source

Additional Reference Height Error Analysis for Baseline Calibration Based on a Distributed Target DEM in TwinSAR-L

Remote Sensing, 2021
In this paper, additional reference height errors, caused by the penetration depth and Signal to Noise Ratio (SNR) decorrelation in desert regions in L-band spaceborne bistatic interferemetric SAR, will introduce significant errors in nowadays baseline ...
Yang Qi, Yu Wang, Jun Hong, Shaoyan Du
doaj   +1 more source

A High-Precision Baseline Calibration Method Based on Estimation of Azimuth Fringe Frequency with THz Interferometry SAR

Remote Sensing, 2023
In this study, repeat-pass synthetic aperture radar interferometry (repeat-pass THz InSAR) is first extended to the terahertz band, and it has tremendous potential in the application of high-resolution three-dimensional (3D) imaging due to its shorter ...
Zeyu Wang, Chao Li, Guohua Zhang, Shen Zheng, Xiaojun Liu, Guangyou Fang   +5 more
doaj   +1 more source

Fast Calibration of Superdirective Ultra-Short Baseline Array

Journal of Marine Science and Engineering, 2023
Array calibration can effectively ensure the positioning accuracy of the ultra-short baseline (USBL) system. Traditional USBL array calibration methods focus on measuring the geometric position of the array elements.
Ruoyu Hu, Yingqiang Wang, Wencheng Yang, Ying Chen, S. H. Huang   +4 more
doaj   +1 more source

Equal Baseline Camera Array—Calibration, Testbed and Applications

Applied Sciences, 2021
This paper presents research on 3D scanning by taking advantage of a camera array consisting of up to five adjacent cameras. Such an array makes it possible to make a disparity map with a higher precision than a stereo camera, however it preserves the ...
Adam L. Kaczmarek, Bernhard Blaschitz
doaj   +1 more source

Spectral observations at the Canary Island Long-Baseline Observatory (CILBO): calibration and datasets [PDF]

Geoscientific Instrumentation, Methods and Data Systems, 2023
The Canary Island Long-Baseline Observatory (CILBO) is a double-station meteor camera setup located on the Canary Islands operated by ESA's Meteor Research Group since 2010.
J. Zender, D. Koschny, D. Koschny, R. Rudawska, S. Vicinanza, S. Loehle, M. Eberhart, A. Meindl, H. Smit, L. Marraffa, R. Landman, D. Stam   +11 more
doaj   +1 more source

Preparation of an Indoor Air Quality Baseline Model for School Retrofitting Using Automated and Semi-Automated Calibrations: The Case Study in South Korea

Buildings, 2022
School retrofitting should aim to not only improve its energy performance, but also maintain a good IAQ. An optimal combination of retrofitting measures must be selected by considering the transient state changes of the outdoor and built environments ...
Ho Jin Sung, Sean Hay Kim, Seung Yeoun Choi   +2 more
doaj   +1 more source