Results 61 to 70 of about 120,602 (222)

Multi-Global Navigation Satellite System for Earth Observation: Recent Developments and New Progress

open access: yesRemote Sensing
The Global Navigation Satellite System (GNSS) has made important progress in Earth observation and applications. With the successful design of the BeiDou Navigation Satellite System (BDS), four global navigation satellite systems are available worldwide,
Shuanggen Jin   +3 more
doaj   +1 more source

Instrumental Error Tolerance in Theodolite Measurements of Upper Winds [PDF]

open access: yesBiuletyn Wojskowej Akademii Technicznej
Modern military conflicts highlight the need for military equipment to be independent of GNSS and radio communications,which are vulnerable to interference and can reveal the position of troops.
Jolanta Siewert, Janusz Jasiński
doaj   +1 more source

Spatial and temporal scales in plant phenotyping for crop water stress assessment: A review

open access: yesThe Plant Phenome Journal, Volume 9, Issue 1, December 2026.
Abstract Water stress is a major limiting factor for crop productivity worldwide, and its impacts are intensifying due to climate variability and increasing water scarcity. This review focuses on the spatial and temporal scales in plant phenotyping as a critical approach to improving crop water‐stress assessment and supporting precision water ...
Daniel Kingsley Cudjoe   +3 more
wiley   +1 more source

Unmanned aerial vehicle–based spatiotemporal phenotyping and growth modeling for forecasting potato yield

open access: yesThe Plant Phenome Journal, Volume 9, Issue 1, December 2026.
Abstract Monitoring spatial variations in plant growth and forecasting yield before harvest provides valuable insights for optimizing agronomic decision‐making in potato (Solanum tuberosum L.) cultivation. Although unmanned aerial vehicle (UAV)‐based remote sensing has recently enabled the development of tuber fresh weight (TW) estimation models, their
Yuto Imachi   +7 more
wiley   +1 more source

GNSS Meteorology in Luxembourg [PDF]

open access: yes, 2012
Atmospheric water vapour is a primary greenhouse gas and plays an important role in weather forecasting and climate monitoring. Global Navigation Satellite System (GNSS) signals experience a propagation delay, which is related to the amount of water vapour in the lower atmosphere.
AHMED, Furqan   +3 more
openaire  

Summary of Research 1997, Department of Meteorology [PDF]

open access: yes, 1997
The views expressed in this report are those of the authors and do not reflect the official policy or position of the Department of Defense or the U.S. Government.This report contains summaries of research projects in the Department of Meteorology.
Faculty of the Department of Meteorology, Naval Postgraduate School
core   +2 more sources

A Regional Model for Predicting Tropospheric Delay and Weighted Mean Temperature in China Based on GRAPES_MESO Forecasting Products

open access: yesRemote Sensing, 2021
Accurate tropospheric delay (TD) and weighted mean temperature (Tm) are important for Global Navigation Satellite System (GNSS) positioning and GNSS meteorology.
Liying Cao   +6 more
doaj   +1 more source

Building a Continental‐Scale Geodetic Network: The Plate Boundary Observatory (PBO)

open access: yesPerspectives of Earth and Space Scientists, Volume 7, Issue 1, December 2026.
Abstract The Plate Boundary Observatory (PBO) transformed the use of geodesy in North America to study crustal deformation and plate boundary processes by establishing a continental‐scale, standardized, open‐access geodetic network. Built and operated by UNAVCO between 2003 and 2018 as part of the National Science Foundation (NSF)‐funded EarthScope ...
Emily E. Zawacki   +5 more
wiley   +1 more source

GNSS Satellite Orbit Validation Using Satellite Laser Ranging [PDF]

open access: yes, 2013
With a total of four new regional and global navigation sa tellite systems that have launched first satellites or even started an operational serv ice, the GNSS landscape has experienced major changes in recent years.
Steigenberger, Peter   +2 more
core  

Summary of Research 1995, Department of Meteorology [PDF]

open access: yes, 1995
The views expressed in this report are those of the authors and do not reflect the official policy or position of the Department of Defense or the U.S.
Faculty of the Department of Meteorology, Naval Postgraduate School
core   +2 more sources

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