Results 1 to 10 of about 81,094 (257)

Ultraviolet Passbands for a Space Multicolor Photometric System

open access: yesOpen Astronomy, 2003
The results of search for the optimal location of ultraviolet passbands for an extra-atmospheric photometric system are given. The addition of passbands near the well-known extinction bump at 218 nm to the photometric system makes it possible to ...
Ambartsoumian A. R.   +2 more
doaj   +1 more source

Interstellar Extinction in the Direction of The Barnard 1 Dark Cloud in Perseus

open access: yesOpen Astronomy, 2003
Spectral and luminosity classes, absolute magnitudes, color excesses, interstellar extinctions and distances are determined for 98 stars down to 18 mag in the Barnard 1 dark cloud belonging to the Per OB2 association. The classification of stars is based
Černis K., Straižys V.
doaj   +1 more source

Color Photometric Stereo Using Multi-Band Camera Constrained by Median Filter and Occluding Boundary

open access: yesJournal of Imaging, 2019
One of the main problems faced by the photometric stereo method is that several measurements are required, as this method needs illumination from light sources from different directions.
Daisuke Miyazaki   +2 more
doaj   +1 more source

Photometry of Variable Stars, and System Transformability Over Long Time Intervals

open access: yesOpen Astronomy, 2003
The fundamental problem of long-term photometric monitoring of variable stars and of multi-wavelength photometric campaigns is the problem of bringing the data to a common standard.
Sterken C.
doaj   +1 more source

Photometric Modeling and Correction of the JiLin-1 Lunar Observations Using the Hapke Model

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The PMS2 spectral imager onboard JiLin-1 (JL-1) satellite conducted extensive lunar observations, capturing images of the Moon across multiple spectral bands ranging from 415 to 1012 nm, spanning a wide range of lunar phases over an extended period ...
Tian-Yi Xu, Min Shu, Yunzhao Wu
doaj   +1 more source

Validating the ICCF-Cut Method with Simultaneous Photometric and Spectroscopic Hα Reverberation Mapping of NGC 4151 and UGC 3374

open access: yesThe Astrophysical Journal
Photometric reverberation mapping (RM) provides an efficient alternative to spectroscopic RM for probing the broad-line region (BLR) sizes in active galactic nuclei.
Chi-Zhuo Wang   +4 more
doaj   +1 more source

Photometric control system for the etching rate of thin dielectric films

open access: yesТехнологія та конструювання в електронній апаратурі, 2006
A methodology for photometric control of the etching rate of thin dielectric films is proposed, the essence of which consists in applying methods of double differentiation and time intervals to the signal of a photometric measuring device.
S. E. Semyonova, E. I. Semyonov
doaj  

Correction factor for real-time determination of wood dust mass concentration by photometric method

open access: yesDrvna Industrija, 2009
Samples of wood dust were collected in the working environment of wood machining processes for the purpose of determining correction factors for measuring mass concentration of wood dust by photometric method.
Ankica Čavlović   +4 more
doaj  

THE APPARATUS FOR ALIGNMENT OF THE PHOTOMETRIC LAMP FILAMENT

open access: yesПриборы и методы измерений, 2015
During photometric measurements involving the use of photometric lamps it is necessary that the filament of lamp takes a strictly predetermined position with respect to the photodetector and the optical axis of the photometric setup.
V. A. Dlugunovich   +4 more
doaj  
Some of the next articles are maybe not open access.

SRPS–Deep-Learning-Based Photometric Stereo Using Superresolution Images

Journal of Computational Design and Engineering, 2021
Seok Chung, Minho Chang
exaly  

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