Results 11 to 20 of about 36,199 (290)
Ionospheric Behaviors Over Korea Peninsula During the Super Geomagnetic Storm Using GPS Measurements [PDF]
Journal of Astronomy and Space Sciences, 2009 The super-geomagnetic storms called 2003 Halloween event globally occurred during the period of 29 through 31 which are the following days when the solar flares of X18 class exploded on 28 October 2003.
Jong-Kyun Chung +4 more
doaj +1 more source
Scientific Data, 2021 Measurement(s) C-band radar backscatter • extent of permanent water bodies Technology Type(s) Synthetic Aperture Radar (SAR) • Synthetic Aperture Radar (SAR) normalised mosaic Factor Type(s) radar backscatter Sample Characteristic - Environment land ...
Bernhard Bauer-Marschallinger +11 more
doaj +1 more source
Performance Analysis of the First Korean Satellite Laser Ranging System [PDF]
Journal of Astronomy and Space Sciences, 2014 The first Korean satellite laser ranging (SLR) system, Daedeok SLR station (DAEK station) was developed by Korea Astronomy and Space Science Institute (KASI) in 2012, whose main objectives are space geodesy researches.
Man-Soo Choi +18 more
doaj +1 more source
Thermosphere modeling capabilities assessment: geomagnetic storms
Journal of Space Weather and Space Climate, 2021 The specification and prediction of density fluctuations in the thermosphere, especially during geomagnetic storms, is a key challenge for space weather observations and modeling.
Bruinsma Sean +3 more
doaj +1 more source
Short-Term Comparison of Several Solutinos of Elliptic Relative Motion [PDF]
Journal of Astronomy and Space Sciences, 2007 Recently introduced, several explicit solutions of relative motion between neighboring elliptic satellite orbits are reviewed. The performance of these solutions is compared with an analytic solution of the general linearized equation of motion.
Jung Hyun Jo +3 more
doaj +1 more source
Perverted Space-Time Geodesy in Einstein’s Views on Geometry
Philosophia Scientiæ, 2018 A perverted space-time geodesy results from the idea of variable rods and clocks, whose length and rates are taken to be affected by the gravitational field.
Mario Bacelar Valente
doaj +1 more source
Trend Analysis of GPS Precipitable Water Vapor Above South Korea Over the Last 10 Years [PDF]
Journal of Astronomy and Space Sciences, 2010 We analyzed global positioning system (GPS)-derived precipitable water vapor (PWV) trends of the Korea Astronomy and Space Science Institute 5 stations (Seoul, Daejeon, Mokpo, Milyang, Sokcho) where Korea Meteorological Administration meteorological ...
Dong-Hyo Sohn, Jungho Cho
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A new laser-ranged satellite for General Relativity and space geodesy: I. An introduction to the LARES2 space experiment [PDF]
, 2017 We introduce the LARES 2 space experiment recently approved by the Italian Space Agency (ASI). The LARES 2 satellite is planned for launch in 2019 with the new VEGA C launch vehicle of ASI, ESA and ELV.
Ciufolini, Ignazio +10 more
core +1 more source
Earth, Planets and Space, 2021 We have produced a 5-year mean secular variation (SV) of the geomagnetic field for the period 2020–2025. We use the NASA Geomagnetic Ensemble Modeling System (GEMS), which consists of the NASA Goddard geodynamo model and ensemble Kalman filter (EnKF ...
Andrew Tangborn +3 more
doaj +1 more source
Retrieval of Electron Density Profile for KOMPSAT-5 GPS Radio Occultation [PDF]
Journal of Astronomy and Space Sciences, 2007 The AOPOD (Atmosphere Occultation and Precision Orbit Determination) system, the secondary payload of KOMPSAT (KOrea Multi-Purpose SATellite)-5 scheduled to be launched in 2010, shall provide GPS radio occultation data.
Woo-Kyoung Lee +8 more
doaj +1 more source