Results 21 to 30 of about 182,753 (279)

NORAD TLE Type Orbit Determination of LEO Satellites Using GPS Navigation Solutions [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2002
NORAD Two Line Elements (TLE) are widely used for the increasing number of small satellite mission operations and analysis. However, due to the irregular periodicity of generation of the NORAD TLE, a new TLE that is independent of NORAD is required.
Chang-Hwa Cho   +4 more
doaj   +1 more source

The colibri telescope array for KBO detection through serendipitous stellar occultations: A technical description

open access: yesFrontiers in Astronomy and Space Sciences, 2022
We present the technical design, construction and testing of the Colibri telescope array at Elginfield Observatory near London, Ontario, Canada. Three 50-cm telescopes are arranged in a triangular array and are separated by 110–160 m.
Michael J. Mazur   +8 more
doaj   +1 more source

Photometry as a proxy for stellar activity in radial velocity analyses

open access: yes, 2020
Stellar activity remains a limiting factor in measuring precise planet parameters from radial velocity spectroscopy, not least in the search for Earth mass planets orbiting in the habitable zones of Sun-like stars.
Crossfield, Ian J. M.   +1 more
core   +1 more source

The Formation and Evolution of Planetary Systems: Description of the Spitzer Legacy Science Database [PDF]

open access: yes, 2008
We present the science database produced by the Formation and Evolution of Planetary Systems (FEPS) Spitzer Legacy program. Data reduction and validation procedures for the IRAC, MIPS, and IRS instruments are described in detail.
Bouwman, Jeroen   +8 more
core   +3 more sources

Metabolic sensing in AgRP neurons integrates homeostatic state with dopamine signalling in the striatum

open access: yeseLife, 2022
Agouti-related peptide (AgRP) neurons increase motivation for food, however, whether metabolic sensing of homeostatic state in AgRP neurons potentiates motivation by interacting with dopamine reward systems is unexplored. As a model of impaired metabolic-
Alex Reichenbach   +17 more
doaj   +1 more source

Photometric Solutions of W UMa Type Stars: GSC2576-0319 and GSC2584-1731 [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2006
High-precision photometric observations were performed in BVI bandpasses using 1m robotic telescope at Mt. Lemmon Observatory for two binary stars, which are reclassified as W UMa-type systems from ROTSE(Robotic Optical Transient Search Experiment ...
Chung-Uk Lee, Jae Woo Lee, Chun-Hwey Kim
doaj   +1 more source

Search and study of the space debris and asteroids within ISON project [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2021
International Scientific Optical Network (ISON) is an open international voluntary project specializing in observations of the near-Earth space objects.
IGOR E. MOLOTOV   +23 more
doaj   +1 more source

INFLUENCE OF LASER BEAM PROFILE ON LIGHT SCATTERING BY HUMAN SKIN DURING PHOTOMETRY BY ELLIPSOIDAL REFLECTORS

open access: yesПриборы и методы измерений, 2018
The correct accounting of laser emitter parameters for improvement of diagnostic authenticity of methods of optical biomedical diagnostic is important problem for applied biophotonic tasks.
M. A. Bezuglyi   +2 more
doaj   +1 more source

Interpreting Flux from Broadband Photometry [PDF]

open access: yes, 2016
We discuss the transformation of observed photometry into flux for the creation of spectral energy distributions and the computation of bolometric luminosities.
Breeveld, Alice   +3 more
core   +4 more sources

STANDARDS OF BELARUS IN THE FIELD OF PHOTOMETRY

open access: yesПриборы и методы измерений, 2015
The article introduces a standard base of Belarus in the field of photometry. Scientific research conducted on the standards can be interest for professionals working in the areas of mechanical engineering, instrument, medicine, agriculture and other.
N. V. Bakovets   +3 more
doaj   +1 more source

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