A convenient telescope performance metric for imaging through turbulence [PDF]
, 2011 This paper provides an overview of the various image quality metrics used in astronomical imaging and explains in details a new metric, the Normalized Point Source Sensitivity.
Angeli, George Z. +3 more
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The moon phases influence on the beginning of astronomical dawn determination in Yogyakarta
International Journal of Science and Applied Science: Conference Series, 2017 In astronomy, there are three types of dawn. They are astronomical, nautical, and civil dawn. The sunlight is starting to appear on the east horizon when the Sun altitude is 18o below the horizon. Hence, there is a change on the sky brightness.
Abu Yazid Raisal +3 more
doaj +1 more source
Laboratory Characterisation of a Commercial RGB CMOS Camera for Measuring Night Sky Brightness
Remote Sensing, 2023 The use of RGB cameras in photometric applications has grown over the last few decades in many fields such as industrial applications, light engineering and the analysis of the quality of the night sky.
Pietro Fiorentin +3 more
doaj +1 more source
The sky brightness measurement during the 2016 solar eclipse in Ternate [PDF]
, 2016 Obscuration of the Sun by the Moon during total solar eclipse generates the changing of the sky brightness. Sky Quality Meter (SQM) was employed to measure the sky brightness during the 2016 total solar eclipse.
Muchlas, M, Pramudia, Yudhiakto
core +1 more source
THE DEVELOPMENT AND VALIDATION OF A TACTICAL GRADE EGI SYSTEM FOR LAND VEHICULAR NAVIGATION APPLICATIONS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023 Over recent years, the utilization of commercially available integrated navigation systems for the development of navigation algorithms has become increasingly commonplace.
Y.-E. Huang +6 more
doaj +1 more source
Scheduling and calibration strategy for continuous radio monitoring of 1700 sources every three days [PDF]
, 2014 The Owens Valley Radio Observatory 40 meter telescope is currently monitoring a sample of about 1700 blazars every three days at 15 GHz, with the main scientific goal of determining the relation between the variability of blazars at radio and gamma-rays ...
Max-Moerbeck, Walter
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Night-Time Skyglow Dynamics during the COVID-19 Epidemic in Guangbutun Region of Wuhan City
Remote Sensing, 2022 The COVID-19 epidemic lockdown has a direct influence on urban socioeconomic activity, including night-time light (NTL) changes. Night-time skyglow, a form of light pollution caused by NTL, is also affected by public emergencies. Here we investigated the
Chengen Li, Xi Li, Changjun Zhu
doaj +1 more source
The Infrared Imaging Spectrograph (IRIS) for TMT: Instrument Overview [PDF]
, 2014 We present an overview of the design of IRIS, an infrared (0.84 - 2.4 micron) integral field spectrograph and imaging camera for the Thirty Meter Telescope (TMT). With extremely low wavefront error (
Aliado, Ted +33 more
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Sky brightness measurements for different environmental conditions by the example of St. Petersburg
SHS Web of Conferences, 2018 St. Petersburg is unique place in Russia with an environmental phenomenon called “white nights” during summertime: sky brightness levels are influenced mostly by environmental conditions.
Kolgushkina Svetlana
doaj +1 more source
The Infrared Imaging Spectrograph (IRIS) for TMT: Data Reduction System [PDF]
, 2016 IRIS (InfraRed Imaging Spectrograph) is the diffraction-limited first light instrument for the Thirty Meter Telescope (TMT) that consists of a near-infrared (0.84 to 2.4 $\mu$m) imager and integral field spectrograph (IFS). The IFS makes use of a lenslet
Chapin, Edward L. +17 more
core +2 more sources