Results 51 to 60 of about 910 (213)
Correcting negatively biased refractivity below ducts in GNSS radio occultation: an optimal estimation approach towards improving planetary boundary layer (PBL) characterization [PDF]
Atmospheric Measurement Techniques, 2017 Global Navigation Satellite System (GNSS) radio occultation (RO) measurements are promising in sensing the vertical structure of the Earth's planetary boundary layer (PBL).
K.-N. Wang +3 more
doaj +1 more source
Control System for the Navigation of the Agricultural Robots: A Review
Journal of Field Robotics, EarlyView.ABSTRACT Control systems for the navigation of autonomous agricultural robots—particularly those operating in uneven terrain and in the presence of static or dynamic obstacles—have advanced considerably in recent years. As conventional machinery evolves toward increasingly automated systems, the design of reliable navigation controllers has become ...
Edna Carolina Moriones Polanía +3 more
wiley +1 more source
Remote Sensing, 2022 The global navigation satellite system (GNSS) radio occultation (RO) is becoming an essential component of National Oceanic and Atmospheric Administration (NOAA) observation systems.
Shu-peng Ho +4 more
doaj +1 more source
Journal of Field Robotics, EarlyView.ABSTRACT This paper presents the first end‐to‐end framework that combines guidance, navigation, and centralized task allocation for multiple UAVs performing autonomous search‐and‐rescue (SAR) in GNSS‐denied indoor environments. A twin delayed deep deterministic policy gradient controller is trained with an artificial potential field (APF) reward that ...
Thomas Hickling +3 more
wiley +1 more source
Remote Sensing, 2020 Global Navigation Satellite System (GNSS) Radio Occultation (RO) is a highly valuable remote sensing technique for probing the Earth’s atmosphere, due to its global coverage, high accuracy, long-term stability, and essentially all-weather capability.
Josef Innerkofler +6 more
doaj +1 more source
Assessment of GRAS Ionospheric Measurements for Ionospheric Model Assimilation
Remote Sensing, 2023 We conducted a study to assess the GNSS (Global Navigation Satellite System) Receiver for Atmospheric Sounding (GRAS) ionospheric data quality by processing Radio Occultation (RO) observations of ionospheric products.
M. M. Hoque +8 more
doaj +1 more source
다중 안테나 기반 데이터 보상을 통한 GNSS RO 전리권 전자밀도 산출 기법 연구
, 2023 학위논문(박사) - 한국과학기술원 : 항공우주공학과, 2023.8,[vii, 113 p. :]Global Navigation Satellite System (GNSS) Radio Occultation (GNSS RO) is a remote sensing technique that observes the Earth's atmosphere, including the ionosphere, based on the degree of refraction and ...
장혜연, Chang, Hyeyeon
core
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
Journal of Space Weather and Space ClimateRadio occultation (RO) measurements performed by Global Navigation Satellite System (GNSS) receivers onboard low-earth orbit (LEO) satellites are commonly used for a variety of atmospheric applications, including ionospheric and space weather studies. We
Mohanty Shradha +2 more
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The potential of observing atmospheric rivers with Global Navigation Satellite System (GNSS) radio occultation [PDF]
Atmospheric Measurement TechniquesAtmospheric rivers (ARs) are comparatively narrow regions in the atmosphere that are responsible for most of the horizontal transport of water vapor in the extratropics, which are responsible for many extreme precipitation events and flooding at ...
B. Rahimi, U. Foelsche, U. Foelsche
doaj +1 more source