Results 51 to 60 of about 1,671 (165)

A new five-wavelength photometer operated in Tromsø (69.6°N, 19.2°E)

Earth, Planets and Space, 2018
A new five-wavelength photometer was developed and installed at the EISCAT Tromsø site (69.6°N, 19.2°E) in January 2017. The photometer consists of two units: an optical unit and a control unit together with a PC.
Satonori Nozawa, Tetsuya Kawabata, Keisuke Hosokawa, Yasunobu Ogawa, Takuo Tsuda, Akira Mizuno, Ryoichi Fujii, Chris Hall   +7 more
doaj   +1 more source

Uncertainty of SYNOP Cloud Classifications by Human Observers

Meteorological Applications, Volume 33, Issue 5, September/October 2026.
Operational cloud classification is subjective to some extent and should not be used without quality control for example, to train automatized methods. Inter‐observer agreement depends on the sky conditions, the nature of the observation (image‐based or on‐site), the framework under which it is conducted (sky snippets for gold standard atlases vs ...
Markus Rosenberger, Manfred Dorninger, Martin Weissmann   +2 more
wiley   +1 more source

HF Heating Effects as Seen From Below and Above: First Results of Joint SURA–Ionosfera‐M Experiment

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract This paper presents the first results of a coordinated experiment on the ionospheric plasma response to high‐frequency (HF) overdense heating, conducted using the SURA heating facility and the Ionosfera‐M satellite. The experiment combined ground‐based observations with in situ satellite measurements, enabling a comprehensive study of ...
A. A. Chernyshov, A. M. Padokhin, S. M. Grach, D. A. Kogogin, A. V. Shindin, S. A. Pulinets, I. A. Nasyrov, A. B. Beletsky, I. D. Tkachev, J. K. Legostaeva, D. V. Chugunin, M. A. Evdokimova, G. A. Kurbatov, K. G. Tsybulya, A. E. Solin, A. V. Shchennikov, E. V. Tareeva, V. V. Emelyanov, M. M. Mogilevsky   +18 more
wiley   +1 more source

A GEO‐LEO Imager Data Set for Characterizing Rapid Changes of Global Aerosol Properties

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 15, 16 August 2026.
Abstract Aerosols, the ubiquitous small particulates in our atmosphere, have climate, air quality, and/or other impacts far from their original sources. The Dark Target Algorithm (DTA), originally developed for retrieving aerosol properties from satellite imagers in Low‐Earth Orbit (LEO), has been ported to imagers in Geostationary (GEO) orbit. Using a
R. C. Levy, P. Gupta, Y. R. Shi, L. A. Remer, M. Kim, M. M. Oo, J. Wei, V. R. Sawyer, V. P. Kiliyanpilakkil, R. E. Holz, B. Ramachandran, R. B. Pierce, S. Mattoo   +12 more
wiley   +1 more source

Visible and Near Infrared (VNIR) Spectroscopy to Decipher Glass and Crystal Content of Lab‐Made Martian Volcanic Analogs

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Understanding how the glass/crystal ratio influences the spectral response of volcanic rocks is crucial for interpreting planetary remote sensing data. Here, four mafic rocks simulating a possible Martian composition were synthesized with identical bulk chemistry but different mineralogical assemblages, from fully amorphous to ∼70 wt.% crystal
Alessandro Pisello, Maximiliano Fastelli, Marco Baroni, Alessandro Musu, Bernard Schmitt, Olivier Poch, Pierre Beck, Maurizio Petrelli, Massimiliano Porreca, Azzurra Zucchini, Paola Comodi, Diego Perugini   +11 more
wiley   +1 more source

Oblique field spectral measurements for enhanced vegetation cover mapping and sand vegetation discrimination in semi-arid gobi landscapes

Nature-Based Solutions
The Gobi Desert, although often appearing barren in nadir satellite imagery, contains ecologically significant grasslands with sparse yet vital vegetation.
Begzsuren Tumendemberel, Namuun Gantulga, Yukihiro Takahashi, Baljmaa Byambakhand, Margad-Erdene Jargalsaikhan, Erdenebaatar Dashdondog, Turtogtokh Tumenjargal, Tergel Shijirtuya, Bayarsaikhan Uudus   +8 more
doaj   +1 more source

Auroral Amplitude Scintillations Revealed With High‐Rate Scintillation Indices From a GNSS Array

Space Weather, Volume 24, Issue 8, August 2026.
Abstract As Global Navigation Satellite Signals pass through the ionosphere, particularly at high latitudes, they can refract and diffract, resulting in a phenomenon known as scintillation. Irregularities of all scale sizes can cause scintillation to occur.
G. Blinstrubas, S. Datta‐Barua
wiley   +1 more source

Theoretical description of functionality, applications, and limitations of SO₂ cameras for the remote sensing of volcanic plumes [PDF]

Atmospheric Measurement Techniques, 2010
The SO2 camera is a novel device for the remote sensing of volcanic emissions using solar radiation scattered in the atmosphere as a light source for the measurements.
U. Platt, M. Wöhrbach, L. Vogel, P. Lübcke, F. Kick, C. Kern   +5 more
doaj   +1 more source

Auroral Effect on Mid‐Latitude Ionospheric Disturbances Over Europe During the Extreme Geomagnetic Storm of 10 May 2024

Space Weather, Volume 24, Issue 8, August 2026.
Abstract Large ionospheric disturbances were observed over Europe during the extreme geomagnetic storm on 10 May 2024. This study analyzes GNSS‐derived total electron content (TEC) and all‐sky imager data to investigate these disturbances. Pronounced TEC enhancements, irregularities, and strong gradients were confined to the auroral region above the ...
Grzegorz Nykiel, Joanna Kanska, Hiroatsu Sato, Shin‐ichiro Oyama, Kazuo Shiokawa, David R. Themens   +5 more
wiley   +1 more source

Measurements of Night Sky Brightness in the Veneto Region of Italy: Sky Quality Meter Network Results and Differential Photometry by Digital Single Lens Reflex

Journal of Imaging, 2019
In this paper, we present the implementation of a monitoring network for artificial light at night (ALAN), based on Sky Quality Meter devices (SQM) installed in seven locations of the Veneto region. The system is coordinated by the Regional Environmental
Andrea Bertolo, Renata Binotto, Sergio Ortolani, Simone Sapienza   +3 more
doaj   +1 more source