Results 71 to 80 of about 467 (182)
Technical Note on Quality Assessment for SPIRE GNSS-RO
In this study the quality assessment of SPIRE GNSS-RO atmopsheric data (pressure and temperature profiles) are presented. Measurements are acquired by STRATOS paylod that makes use of GPS occultation measurements to determine temperature,pressure and humidity profiles of Earth's atmosphere for application in operationalmeteorology.The instrument ...
Piro, Alessandro, Albinet, Clement
openaire +2 more sources
Climatic Higher‐Order Balanced Winds Beyond Geostrophic and Gradient Wind Fields
Earth and Space Science, Volume 13, Issue 5, May 2026.Abstract We present a novel approach to derive three‐dimensional Climatic Higher‐Order Balanced (CHOB) wind fields from thermodynamic state variables in the free troposphere and stratosphere. The CHOB method is developed for monthly synoptic‐scale wind field estimation, utilizing commonly used balanced winds (geostrophic and gradient wind) enhanced by ...
I. Nimac, J. Unegg, J. Danzer
wiley +1 more source
Introducing Reflected GNSS TEC Data Into ANCHOR Ionospheric Data Assimilation Model
Space Weather, Volume 24, Issue 5, May 2026.Abstract ANCHOR is a novel data assimilation (DA) algorithm developed at the U.S. Naval Research Laboratory to improve ionospheric nowcasting by increasing accuracy and decreasing computational cost. As a parameterized DA model, ANCHOR represents the ionosphere using physical parameters such as the F2 layer peak (Nm $Nm$F2), which characterizes a ...
Brenna Royersmith +5 more
wiley +1 more source
Prediction of LAI in Scots Pine Forests of Türkiye Using UAV and Sentinel 2 Images
Transactions in GIS, Volume 30, Issue 3, May 2026.ABSTRACT Monitoring the structural characteristics of vegetation cover is critical for understanding ecosystem functioning and sustainable forest management. Effective Leaf area index (LAIe) is directly related to photosynthetic capacity, carbon cycle, and water balance of ecosystems.
Hasan Aksoy +4 more
wiley +1 more source
NDT - Journal of Non-Destructive TestingClimate change monitoring and analysis is a critical task that involves the consideration of both spatial and temporal dimensions. Theimproved spatial distribution of the global navigation satellite system (GNSS) ground-based Continuous Operating ...
Usman Sa’i Ibrahim +6 more
doaj +1 more source
Quality Assessment of YUNYAO GNSS-RO Refractivity Data in the Neutral Atmosphere
Abstract. GNSS (Global Navigation Satellite System) Radio Occultation (RO) data is an important component of numerical weather prediction (NWP) systems. To incorporate more GNSS RO data into NWP systems, commercial RO data has become an excellent option. Tianjin Yunyao Aerospace Technology Co., Ltd.
Xiaoze Xu +6 more
openaire +2 more sources
A Novel Sampling Approach in GNSS-RO Receivers with Open Loop Tracking Method
AUT Journal of Electrical Engineering, 2019 Propagation of radio occultation (RO) signals through the lower troposphere results in high phase acceleration and low signal to noise ratio signal. The excess Doppler estimation accuracy in lower troposphere is very important in receiving RO signals which can be estimated by sliding window spectral analysis.
openaire +2 more sources
One‐Dimensional Variational Ionospheric Retrieval Using Radio Occultation Bending Angles: 1. Theory
Space WeatherA new one‐dimensional variational (1D‐Var) retrieval method for ionospheric GNSS radio occultation (GNSS‐RO) measurements is described. The forward model implicit in the retrieval calculates the bending angles produced by a one‐dimensional ionospheric ...
I. D. Culverwell +2 more
doaj +1 more source
AtmosphereThe accuracy of numerical weather prediction largely depends on the quality of the initial conditions. Global Navigation Satellite System radio occultation (GNSS-RO) observations, with their high vertical resolution, play an important role in reducing ...
Liang Kan +12 more
doaj +1 more source
Prospects for meteotsunami detection in earth's atmosphere using GNSS observations. [PDF]
GPS Solut, 2023 Vergados P +6 more
europepmc +1 more source