Results 51 to 60 of about 458 (205)
Precision Assessment of Near Real Time Precise Orbit Determination for Low Earth Orbiter [PDF]
Journal of Astronomy and Space Sciences, 2011 The precise orbit determination (POD) of low earth orbiter (LEO) has complied with its required positioning accuracy by the double-differencing of observations between International GNSS Service (IGS) and LEO to eliminate the common clock error of the ...
Jong-Yeoun Choi, Sang-Jeong Lee
doaj +1 more source
A Generic, Multimodal Geospatial Data Alignment System for Aerial Navigation
Remote Sensing, 2023 We present a template matching algorithm based on local descriptors for aligning two geospatial products of different modalities with a large area asymmetry.
Victor Martin-Lac +2 more
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Journal of Geophysical Research: Space Physics, Volume 131, Issue 6, June 2026.Abstract Capturing global ionospheric response during extreme geomagnetic storms remains a major observational challenge. During 10–11 May, 2024 superstorm, we investigate the height‐dependent response of the F‐region using multi‐constellation GNSS‐POD limb‐sounding measurements from COSMIC‐2, Spire, PlanetiQ, and FengYun‐3 satellites. Approximately 12,
Nimalan Swarnalingam +3 more
wiley +1 more source
AtmosphereRadio occultation (RO) is a technique used for measuring planetary atmosphere properties by orbiting satellites, like temperature, pressure, and water vapor.
Karl Philippe A. Descalzo +1 more
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Synchronous high revisit mixed sensor constellation : architectural design optimisation and trade-offs for emergency response [PDF]
, 2023 LAUREA MAGISTRALEQuesto studio ha affrontato la progettazione di una costellazione sincrona ad alta rivisita di piccoli satelliti ottici e Synthetic Aperture Radar (SAR) dedicata alla risposta alle emergenze in Italia.
Catalano, Alessandro Federico
core
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 8, 28 April 2026.Abstract China has become a global hotspot of ozone (O3) pollution, and understanding O3 formation regime is crucial for air quality management. Satellite‐observed formaldehyde‐to‐nitrogen‐dioxide ratio (HCHO/NO2, FNR) has long been demonstrated as an efficient way to infer O3 formation regime.
Qianqian Yang +14 more
wiley +1 more source
The Use of C-Band and X-Band SAR with Machine Learning for Detecting Small-Scale Mining
Remote Sensing, 2022 Illicit small-scale mining occurs in many tropical regions and is both environmentally and socially hazardous. The aim of this study was to determine whether the classification of Synthetic Aperture Radar (SAR) imagery could detect and map small-scale ...
Gabrielle Janse van Rensburg, Jaco Kemp
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Radar satellite imagery for humanitarian response. Bridging the gap between technology and application [PDF]
, 2019 This work deals with radar satellite imagery and its potential to assist of humanitarian operations. As the number of displaced people annually increases, both hosting countries and relief organizations face new challenges which are often related to ...
Braun, Andreas
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Journal of Geophysical Research: Atmospheres, Volume 131, Issue 1, 16 January 2026.Abstract Accurate retrieval of satellite‐derived aerosol optical depth (AOD) is critical for air quality forecasting, especially when AOD is assimilated into models. However, if retrieval errors in the satellite‐derived AOD are not corrected or characterized, they can lead to false analysis increments and ultimately degrade the quality of data ...
Joonhee Kim +6 more
wiley +1 more source
Topside Ionization and Effect on Altitudinal Evolution of Nocturnal Ionospheric Irregularities
Space 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