Results 141 to 150 of about 467 (182)
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Polarimetric GNSS RO aboard the PAZ satellite
2021Talk delivered in Informal Seminar UK MetOffice in Great Britain, 21 February 2020 ,
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Revised GNSS‐RO observation uncertainties in the Met Office NWP system
Quarterly Journal of the Royal Meteorological Society, 2020AbstractThe diagnostics of Desroziers et al. have been used to estimate the uncertainties of Global Navigation Satellite System Radio Occultation (GNSS‐RO) observations. Compared with the uncertainties that are currently operational, the new uncertainties are smaller and vary with height, latitude, satellite identifier, and other variables. The initial
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The diurnal cycle of gravity waves in GNSS-RO data
Gravity wave sources such as convection are known to have a diurnal cycle, so it is expected that gravity waves should also follow a diurnal cycle. However, although this cycle can be simulated in models and observed in ground based data at fixed locations, it is difficult to observe in global satellite observations, due to their low time resolution ...Emily Lear, Corwin Wright, Neil Hindley
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Investigating equatorial waves with high-density ROMEX GNSS-RO observations
Remote sensing from satellites provides a powerful means of observing the Earth’s atmosphere with global coverage and high vertical resolution. Among these techniques, Global Navigation Satellite System radio occultation (GNSS-RO) offers a low-cost approach that delivers large volumes of high-quality atmospheric temperature profiles. While several tensLina Lucas +4 more
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Impact of GNSS RO Data on the Prediction of Atmospheric River Events: A ROMEX Experiment
Weather and ForecastingAbstract The assimilation of Global Navigation Satellite Systems (GNSS) radio occultation (RO) data has been shown to improve the prediction of atmospheric rivers (ARs), which are key drivers of heavy precipitation along the U.S. West Coast. This study builds on prior research by evaluating the impact of the Radio Occultation Modeling
Hsiao-Chun Lin +4 more
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Mountaintop GNSS-R and GNSS-RO Experiment: New Results and Insights
ION Pacific PNT, 2019Jade Morton +5 more
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Long-term Changes in Global Tropopause Characteristics from GNSS-RO Observations
The tropopause is an important boundary (or transition layer) for many studies in the atmospheric sciences and is an indicator of global climate change. Numerous characteristics of the tropopause have been shown to exhibit significant long-term change over the most recent 40+ year period, including height, temperature, and the occurrence of multiple ...Cameron Homeyer, Emily Tinney
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Precise Orbit Determination of the Spire GNSS-RO Constellation
This study introduces the raw observation approach for precise orbit determination (POD) of commercial 3U CubeSats equipped with a STRATOS receiver that collect dual-frequency GNSS observations. Different Spire CubeSats, each with different orbital characteristics and inclinations, are analyzed by processing reduced dynamic and kinematic orbits from ...SHAFIEI, Parisa +2 more
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Comparison of reference upper-air GRUAN and homogenized RHARM data with GNSS-RO
The study of thermodynamical variables, such as temperature and relative humidity in the upper troposphere/lower stratosphere (UT/LS), is one of the key elements for the study of climate change. Several studies estimated trends both regionally and globally in the UT/LS, using both satellite and ground-based data and different measurement techniques ...Fabrizio Marra +5 more
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A Review on Multi-GNSS for Earth Observation and Emerging Applications
Remote Sensing, 2022Shuanggen Jin +2 more
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