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Article
Real-time GNSS tropospheric delay estimation with a novel global random walk processing noise model (GRM)
Accurate modeling of tropospheric delays is crucial for the global navigation satellite system (GNSS), which finds extensive applications in early warning systems of natural hazards and extreme weather forecas...
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Article
Real-time shipborne multi-GNSS atmospheric water vapor retrieval over the South China Sea
Atmospheric water vapor plays a prominent role in weather forecasting and climate change, which can be measured accurately with conventional water vapor observing techniques and the global navigation satellite...
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Article
TropNet: a deep spatiotemporal neural network for tropospheric delay modeling and forecasting
Water vapor plays an essential role in regulating the earth’s weather and climate, and the tropospheric delays caused by water vapor are one of the error sources in space geodetic techniques. Attributing to th...
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Article
A tropospheric delay model to integrate ERA5 and GNSS reference network for mountainous areas: application to precise point positioning
In this study, a tropospheric delay model that integrates tropospheric delays derived from the European Centre for Medium-Range Weather Forecasts fifth-generation global atmospheric reanalysis and the Continuo...
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Article
Precipitable water vapor fusion of MODIS and ERA5 based on convolutional neural network
Sensing precipitable water vapor (PWV) in the earth’s atmosphere is of significant importance for contributing to severe weather event monitoring and forecasting. PWV can be measured and retrieved with various...
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Article
Rapid calibration of HY-2A satellite-borne microwave radiometer using coastal GNSS observations
Satellite-borne microwave radiometers provide wet tropospheric correction (WTC) for altimetry observations, which is critical to high-accuracy sea surface height (SSH) measurements. However, it was reported th...
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Article
Improving LEO precise orbit determination with BDS PCV calibration
As the new members of the Chinese Fengyun-3 meteorological satellites series, the Fengyun-3C (FY-3C) and Fengyun-3D (FY-3D) satellites were launched in 2013 and 2017, respectively. For the first time, both FY-...
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Chapter and Conference Paper
Effects of Meteorological Input Data on the VLBI Station Coordinates, Network Scale, and EOP
The requirement for the quantification of sea level rise and other global change phenomena are precise and stable reference frames. To accord with these science driven requirements, GGOS, the Global Geodetic O...
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Article
Initial assessment of the COMPASS/BeiDou-3: new-generation navigation signals
The successful launch of five new-generation experimental satellites of the China’s BeiDou Navigation Satellite System, namely BeiDou I1-S, I2-S, M1-S, M2-S, and M3-S, marks a significant step in expanding Bei...
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Article
Improving BeiDou real-time precise point positioning with numerical weather models
Precise positioning with the current Chinese BeiDou Navigation Satellite System is proven to be of comparable accuracy to the Global Positioning System, which is at centimeter level for the horizontal componen...
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Chapter and Conference Paper
Antenna Axis Offsets and Their Impact on VLBI Derived Reference Frames
We have estimated the antenna axis offsets of VLBI (Very Long Baseline Interferometry) telescopes using VLBI data from 1995 to 2013. These were compared to values estimated in terrestrial surveys. We generally...
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Article
Estimation and evaluation of real-time precipitable water vapor from GLONASS and GPS
The revitalized Russian GLONASS system provides new potential for real-time retrieval of zenith tropospheric delays (ZTD) and precipitable water vapor (PWV) in order to support time-critical meteorological app...
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Chapter and Conference Paper
Rapid UT1 Estimation by Combining VLBI Intensives with GNSS
We present a Kalman filter for combining dUT1 from the VLBI Intensive sessions with GNSS results for rapid estimation of dUT1. In order to be able to also combine polar motion, pre-reduced normal equations for...
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Article
Real-time retrieval of precipitable water vapor from GPS and BeiDou observations
The rapid development of the Chinese BeiDou Navigation Satellite System (BDS) brings a promising prospect for the real-time retrieval of zenith tropospheric delays (ZTD) and precipitable water vapor (PWV), whi...
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Article
Atmospheric modeling for co-located VLBI antennas and twin telescopes
In the next generation VLBI network, the VLBI global observing system (VGOS), there will be several twin telescopes, i.e. stations equipped with a pair of VLBI telescopes with identical design. In this work we...
