G2.2 | High-precision GNSS: methods, open problems, and geoscience applications
High-precision GNSS: methods, open problems, and geoscience applications
Convener: Jacek Paziewski | Co-conveners: Mattia Crespi, Jianghui Geng, Elisa Benedetti, Alvaro Santamaría-Gómez

In recent years, we have observed steady progress in signals, services, and satellite deployment of Global Navigation Satellite Systems (GNSS). Consequently, modernizing and developing GNSS constellations have moved us towards an era of multi-constellation and multi-frequency GNSS signal availability. Also, the deployment of LEO constellations brings opportunities for LEO-augmented PNT services and applications, which, however, require revisiting existing processing algorithms and developing novel ones when fusing LEO and GNSS. Meanwhile, technological development has provided high-grade GNSS user receivers capable of collecting high-rate, low-noise, and multipath-impact measurements. Also, recent extraordinary progress in low-cost GNSS chipsets, smartphones, and sensor fusion must be acknowledged. Such advancements boost GNSS research and catalyze an expansion of satellite navigation to novel areas of science and industry. On one side, the developments stimulate a broad range of new GNSS applications. On the other hand, they pose new challenges for data processing. Hence, algorithmic advancements are needed to address the opportunities and challenges in enhancing the accuracy, availability, interoperability, and integrity of high-precision GNSS applications.
This session is a forum for discussing advances in high-precision GNSS algorithms and their applications in geosciences, including geodesy, geodynamics, seismology, tsunamis, the ionosphere, and the troposphere.
We encourage but do not limit submissions related to:
- GNSS processing algorithms,
- Multi-GNSS benefits for Geosciences,
- Multi-constellation GNSS processing and product standards,
- High-rate GNSS,
- Low-cost receiver and smartphone GNSS observations for precise positioning, navigation, and geoscience applications,
- LEO observations modeling and processing algorithms,
- Precise Point Positioning (PPP, PPP-RTK) and Real Time Kinematic (RTK),
- GNSS and other sensors (accelerometers, INS, etc.) fusion,
- GNSS products for high-precision applications (orbits, clocks, uncalibrated phase delays, inter-system and inter-frequency biases, etc.),
- Troposphere and ionosphere modeling and sounding with GNSS,
- CORS services for Geosciences (GBAS, Network-RTK, etc.),
- Precise Positioning of EOS platforms,
- GNSS for natural hazards prevention,
- Monitoring crustal deformation and the seismic cycle of active faults,
- GNSS and early-warning systems,
- GNSS reflectometry.