Results 21 to 30 of about 910 (213)
Can the Spire GNSS-RO CubeSats Constellation Observe Earth's Gravity Field?
peer reviewedDual-frequency GNSS data from onboard Precise Orbit Determination (POD) antennas has emerged as a promising tool for investigating the time-variable components of Earth's gravity field.
SHAFIEI, Parisa, TABIBI, Sajad
core +3 more sources
Commercial GNSS Radio Occultation on Aerial Platforms With Off-The-Shelf Receivers
Navigation, 2022 In recent decades, GNSS radio occultation (RO) soundings have proven to be an invaluable input to global weather forecasting. The success of government programs such as COSMIC is now complemented by commercial low-cost cubesats.
Bryan C. Chan +10 more
doaj +1 more source
An evaluation of GNSS radio occultation atmospheric profiles from Sentinel-6
Egyptian Journal of Remote Sensing and Space Sciences, 2023 The Global Navigation Satellite System (GNSS) radio occultation (RO) significantly impacts climate change monitoring. GNSS RO is based mainly on the refraction of the GNSS signals transmitted by satellites and received by a receiver on a Low Earth Orbit (
Mohamed Zhran
doaj +1 more source
Real-time GNSS precise positioning: RTKLIB for ROS [PDF]
International Journal of Advanced Robotic Systems, 2020 The global navigation satellite system (GNSS) constitutes an effective and affordable solution to the outdoor positioning problem. When combined with precise positioning techniques, such as the real time kinematic (RTK), centimeter-level positioning accuracy becomes a reality. Such performance is suitable for a whole new range of demanding applications,
Ferreira, António +3 more
openaire +3 more sources
Remote Sensing, 2023 High-frequency skywave propagation can be heavily impacted by D- and E-region dynamics requiring accurate global measurements to optimize performance. A standard measurement technique is to use ionosondes, but they are unable to measure below 1 MHz and ...
Dylan J. Shaver +5 more
doaj +1 more source
Remote Sensing, 2021 The Global Navigation Satellite System (GNSS) radio occultation (RO) is a remote sensing technique that uses International System of Units (SI) traceable GNSS signals for atmospheric limb soundings.
Yong Chen +3 more
doaj +1 more source
gnss-ro/aws-opendata: GNSS-RO AWS Open Data v1.0.0
, 2023 GNSS Radio Occultation Data in the AWS ...
gnss-ro, amymcvey, ssleroy
core +1 more source
Atmospheric GNSS RO 1D-Var in Use at UCAR: Description and Validation
Remote Sensing, 2022 This paper describes, along with some validation results, the one-dimensional variational method (1D-Var) that is in use at the University Corporation for Atmospheric Research (UCAR) to retrieve atmospheric profiles of temperature, pressure, and humidity from the observation of the Global Navigation Satellite System (GNSS) radio occultation (RO).
Tae-Kwon Wee +4 more
openaire +2 more sources
Geophysical Research Letters, 2023 This study assesses the potential influence of global navigation satellite system (GNSS) radio occultation (RO) data assimilation on the forecast skill of tropical cyclone formation over the western North Pacific in September–October 2019 through a ...
Hsu‐Feng Teng +2 more
doaj +1 more source
Stability of CubeSat Clocks and Their Impacts on GNSS Radio Occultation
Remote Sensing, 2022 Global Navigation Satellite Systems’ radio occultation (GNSS-RO) provides the upper troposphere-lower stratosphere (UTLS) vertical atmospheric profiles that are complementing radiosonde and reanalysis data. Such data are employed in the numerical weather
Amir Allahvirdi-Zadeh +4 more
doaj +1 more source