Results 1 to 10 of about 29,148 (239)

3-D Imaging Systems for Agricultural Applications—A Review

Sensors, 2016
Efficiency increase of resources through automation of agriculture requires more information about the production process, as well as process and machinery status. Sensors are necessary for monitoring the status and condition of production by recognizing
Manuel Vázquez-Arellano, Hans W. Griepentrog, David Reiser, Dimitris S. Paraforos   +3 more
doaj   +1 more source

Interference Measurements Across Vacuum and Atmospheric Environments for Characterization of Space-Borne Telescope

Photonics
A space-borne telescope is used for Earth observation at about 500 km above sea level in the thermosphere where the air density is very low and the temperature increases significantly during daytime. If the telescopes are aligned and characterized on the
Yi-Kai Huang, Cheng-Huan Chen
doaj   +1 more source

SURE-Fuse WFF: A Multi-Resolution Windowed Fourier Analysis for Interferometric Phase Denoising

IEEE Access, 2019
Interferometric phase (InPhase) images, acquired by phase imaging systems, often suffer from two major degradations: 1) phase wrapping, caused by the sinusoidal 2π-periodic sensing mechanism, and 2) noise, introduced by the acquisition process or ...
Joshin P. Krishnan, Mario A. T. Figueiredo, Jose M. Bioucas-Dias   +2 more
doaj   +1 more source

Interferometry of ionospheric E-region irregularities based on Kunming VHF radars

Frontiers in Astronomy and Space Sciences
There is a long history of using VHF radar systems to detect ionospheric irregularities based on the theory of coherent scattering. According to previous work, there is a high occurrence of field-aligned irregularities (FAIs) in the ionospheric E-region ...
Bo Chen, Yihao Xu, Chen Zhou, Yuqiang Zhang, Yi Liu, Tong Xu, Bin Xu, Jian Feng, Ting Lan, Haiyin Qing, Zhongxin Deng, Xiang Wang, Xiang Wang, Xinmiao Zhang   +13 more
doaj   +1 more source

Measuring Coseismic Deformation With Spaceborne Synthetic Aperture Radar: A Review

Frontiers in Earth Science, 2019
In the past 25 years, space-borne Synthetic Aperture Radar imagery has become an increasingly available data source for the study of crustal deformation associated with moderate to large earthquakes (M > 4.0).
John Peter Merryman Boncori
doaj   +1 more source

Comparison of Molecular Iodine Spectral Properties at 514.7 and 532 nm Wavelengths

Measurement Science Review, 2014
We present results of investigation and comparison of spectral properties of molecular iodine transitions in the spectral region of 514.7 nm that are suitable for laser frequency stabilization and metrology of length.
Hrabina J., Acef O., Burck F. du, Chiodo N., Candela Y., Sarbort M., Hola M., Lazar J.   +7 more
doaj   +1 more source

Real-Time Detection of Human Growth Hormone Based on Nanoporous Anodic Alumina Interferometric Biosensor

Sensors
Human growth hormone (hGH) is a polypeptide hormone that is synthesized and secreted by the anterior pituitary gland, whose excess is linked to acromegaly-causing pituitary adenomas while deficiencies are linked to disorders including short stature and ...
Josep Maria Cantons, Laura K. Acosta, Pilar Formentin, Josep Ferré-Borrull, Akash Bachhuka, Lluis F. Marsal   +5 more
doaj   +1 more source

Calibration and sensitivity enhancement of AI rate integrator through EKF and impact on raman spectroscopy optimal wavelengths. [PDF]

PLoS One
Keighobadi J, Imani F.
europepmc   +1 more source

Per-Span Microwave-Frequency Fiber Interferometry for Amplified Transmission Links Employing High-Loss Loopbacks. [PDF]

Sensors (Basel)
Karydis GA, Skontranis M, Simos C, Simos I, Nikas T, Mesaritakis C, Bogris A.   +6 more
europepmc   +1 more source

A Compact Dual-Oblique-Fiber Heterodyne Phase-Shifting Point Diffraction Interferometer. [PDF]

Sensors (Basel)
Wang Y, Zhu C, Zhang W.
europepmc   +1 more source