Results 81 to 90 of about 18,306,384 (179)

Topside Ionization and Effect on Altitudinal Evolution of Nocturnal Ionospheric Irregularities

open access: yesSpace Weather, Volume 24, Issue 1, January 2026.
Abstract Topside ionospheric electron density (Ne) and its control on the variabilities in nocturnal ionospheric irregularities is examined globally using electron density measurements from COSMIC‐2 and Swarm satellite, along with the Swarm satellite‐based Ionospheric Plasma Irregularity (IPIR) index for low and high solar activity (LSA and HSA ...
T. V. Sruthi, G. Manju
wiley   +1 more source

Analysis of Damage Probability for Collision Between Space Debris and a Satellite in Low-Earth Orbit [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2007
Space environment becomes more hazardous for satellite because of increasing number of space debris. This research is to analyze collision hazards between KOMPSAT 3 in low-earth orbit and space debris generated by the explosion of FengYun satellite on ...
Jae-Eun Lee   +5 more
doaj   +1 more source

Trees Outside Forests (TOFs): A Global Review of Methodological Advances, Limitations, and Framework Innovations

open access: yesInternational Journal of Forestry Research, Volume 2026, Issue 1, 2026.
Trees outside forests (TOFs) represent an important natural and anthropogenic resource that contributes significantly to biodiversity conservation, climate resilience, and the protection of forest genetic resources (FGRs). Despite their ecological and socioeconomic importance, TOFs are increasingly declining due to land‐use changes, urbanization ...
Aman Dabral   +9 more
wiley   +1 more source

MTF DETERMINATION OF SENTINEL-4 DETECTOR ARRAYS [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017
The Institute for Optical Sensor Systems was involved in many international space projects in recent years. These include, for example, the fokal plane array (FPA) of the hyperspectral sensors ENMAP or Sentinel-4, but also the FPA for the high ...
R. Reulke   +3 more
doaj   +1 more source

Machine Learning‐Based Turbulence Intensity Estimation Near Convective Clouds in East Asia Using GK‐2A Satellite Observations

open access: yesGeophysical Research Letters, Volume 52, Issue 23, 16 December 2025.
Abstract The detection of atmospheric turbulence, particularly near deep convection, are essential for flight safety and efficiency. Geostationary satellites provide continuous coverage where radar is unavailable, but their lack of vertical information limits detection to upper levels.
Yoonjin Lee   +2 more
wiley   +1 more source

Sub‐Seasonal Impact of GNSS Radio Occultation Data

open access: yesGeophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract This study investigates for the first time whether the assimilation of the Global Navigation Satellite System Radio occultation (GNSS‐RO) data has a significant impact on the European Centre for Medium‐Range Weather Forecasts sub‐seasonal forecasts.
K. Lonitz   +3 more
wiley   +1 more source

On-Orbit Performance of KOMPSAT-2 Attitude & Orbit Control System [PDF]

open access: yes, 2007
KOMPSAT-2 is the second Korean earth observation satellite after KOMPSAT-1: the 1 meter GSD cartographic capability and it launched in the end of July of 2006 by ROKOT launch vehicle.
Rhee, Seung-Wu, Lee, Joo-Jin
core   +1 more source

DSM Quality of Korean Satellite KOMPSAT-3 in Comparison to AW3D30 and Sentinel-1A in Respect of Airborne Laser Scanning

open access: yesKSCE Journal of Civil Engineering, 2019
With significant technological improvements on earth observation instruments, three dimensional space-borne remote sensing data became indispensable for modelling large areas and continents. To acquire high resolution 3D earth data, actual optical and synthetic aperture radar (SAR) satellite missions are launched frequently.
Umut Gunes Sefercik   +3 more
openaire   +2 more sources

KOMPSAT Beta Test: Ocean Applications Using KOMPSAT Satellite Data

open access: yes, 2016
For monitoring of coastal erosion in the East Sea, one KOMPSAT-3A data obtained on November 26, 2015 is used. This data is applied at the auto-extraction algorithm of coastline which was developed using three KOMPSAT-2 data previously. Another KOMPSAT-3A
양찬수, 김선화, 홍단비
core  

Systematic Slowing of Initially Rapid Retreat of New Coasts Formed by Historical Eruptions in Volcanic Islands

open access: yesJournal of Geophysical Research: Earth Surface, Volume 130, Issue 8, August 2025.
Abstract Due to their exposure to waves, volcanic island coasts typically retreat with cliff collapses and other erosional processes. Understanding how retreat rates vary over time and in response to environmental and other factors could be useful for geohazard assessment, coastal management and landform reconstruction.
Zhongwei Zhao   +3 more
wiley   +1 more source

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