Results 21 to 30 of about 494 (132)
GPS tomography: validation of reconstructed 3-D humidity fields with radiosonde profiles [PDF]
Annales Geophysicae, 2013 Water vapor plays an important role in meteorological applications; GeoForschungsZentrum (GFZ) therefore developed a tomographic system to derive 3-D distributions of the tropospheric water vapor above Germany using GPS data from about 300 ground ...
M. Shangguan +6 more
doaj +1 more source
Earth and Space Science, 2019 Tropospheric delay is an important error source in Global Navigation Satellite System (GNSS) positioning and can also be used in water vapor monitoring.
Zhangyu Sun, Bao Zhang, Yibin Yao
doaj +1 more source
INVESTIGATION OF THE AIR QUALITY CHANGE EFFECT ON GNSS SIGNALS [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2017 Air pollution is the most important environmental problem in Zonguldak city center. Since bituminous coal is used for domestic heating in houses and generating electricity in thermal power plants, particulate matter (PM10) is the leading air pollutant ...
G. Gurbuz, K. S. Gormus, U. Altan
doaj +1 more source
Remote Sensing, 2022 The prior zenith hydrostatic delay (ZHD) is an essential parameter for the Global Navigation Satellite System (GNSS) and very long baseline interferometry (VLBI) high-precision data processing. Meanwhile, the precise ZHD facilitates the separation of the
Junyu Li +5 more
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Tropospheric Refractivity Profile Estimation by GNSS Measurement at China Big-Triangle Points
Atmosphere, 2021 Atmospheric radio refractivity has an obvious influence on the signal transmission path and communication group delay effect. The uncertainty of water vapor distribution is the main reason for the large error of tropospheric refractive index modeling ...
Xiang Dong +5 more
doaj +1 more source
River, EarlyView.Abstract Water is essential for life, and effective hydrological management is crucial for economic stability and quality of life. Poor water resource governance can lead to scarcity, displacement, or even fatal consequences. Hydrological conditions in East Africa are influenced by drivers such as demographic expansion, industrialization, droughts, and
Mekuanint Eresho Wollebo +2 more
wiley +1 more source
Long‐Term Propagation Measurements in Madrid in a Q‐Band Satellite‐to‐Earth Link
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT The Q/V band (40/50 GHz) is gaining interest as satellite operators will need larger bandwidth to be able to provide their services, which are experiencing an increasingly high demand. An accurate characterization of the satellite‐to‐Earth propagation channel is of paramount importance to guarantee a high level of quality of service, by ...
Domingo Pimienta‐del‐Valle +3 more
wiley +1 more source
Selecting ERA5 Grid Spacing for GNSS Tropospheric Parameters over China
AtmosphereERA5 is the fifth-generation atmospheric reanalysis from the European Centre for Medium-Range Weather Forecasts. It combines observations with a weather model to reconstruct past atmospheric conditions.
Ziyang Ding +4 more
doaj +1 more source
Remote Sensing, 2021 Tropospheric delay is a major error source in the Global Navigation Satellite System (GNSS), and the weighted mean temperature (Tm) is a key parameter in precipitable water vapor (PWV) retrieval. Although reanalysis products like the National Centers for
Lijie Guo +8 more
doaj +1 more source
Intercropping mitigates incidence of the oilseed rape insect pest complex
Pest Management Science, Volume 82, Issue 11, Page 10695-10704, November 2026.Intercropping reduces the incidence of the oilseed rape insect pest complex with a significant impact of the direct visual and physical disruption provided by the companion plant. Abstract BACKGROUND Oilseed rape (OSR, Brassica napus) is a major crop requiring numerous phytosanitary treatments.
Laurie Magnin +3 more
wiley +1 more source