IAG2021 Opening Ceremony

Greeting 1

Greeting 2

Greeting 3

Greeting 4

Geodesy Contribution to Climate Research

Featured services and performances of BDS-3

Welcome

IAG activities 2019 – 2021 and perspectives 2021-2023

IAG administration report 2019 – 2021

Presentation of the IAG Young Authors Awards 2019 and 2020

Overview of the IAG Scientific Assembly programme

New Developments on the IDS Contribution to the ITRF2020

The International Laser Ranging Service (ILRS) Contribution to the Development of the ITRF2020

Combined IVS contribution to the ITRF2020

Status of ITRF2020 analysis and early results

Quality Evaluation of the Continental Water Storage models for correcting the Crustal Movement Observation Network of China height time series

Characteristics and Predictability of Postseismic Deformation in Reference Frame Models

Handling of tropospheric and range biases in Satellite Laser Ranging

Discussion

Multi-technique combinations using a closure in time

Large-scale dimensional metrology for geodesy - first results from the European GeoMetre Project

Demonstration of 1 mm Precision for Kilometer Co-location Ties at McDonald Geodetic Observatory

Reference frame realization using co-location in space onboard Galileo satellites

Dilution of Precision (DOP) factors for evaluating observations to Galileo satellites with VLBI

On DORIS and SLR simulation studies to single-satellite space-ties to achieve the Global Geodetic Observing System goals

Towards tropospheric ties in the computation of terrestrial reference frames

Discussion

Scientific goals and strategic actions of EUREF in a changing landscape

Recent achievements and current challenges in the maintenance of the geodetic reference frame of the Americas

The North American Terrestrial Reference Frame of 2022: Its Definition and Plans for Adoption

Research on the realization of the regional reference frame

GIANT-REGAIN: A comprehensive analysis of geodetic GNSS recordings in Antarctica for geodetic and geodynamic applications

Approaches to time-dependent transformations between reference frames in deforming regions

On the impact of individual PCC errors on regional networks using different processing strategies

Discussion

Multi-technique Integrated Processing on the Observation Level for Consistent Determination of TRF, CRF and EOPs

Weekly Terrestrial Reference Frame realization from a combination of GNSS/SLR/VLBI/DORIS at the parameter level

Combination of the VLBI, GNSS and LLR station coordinates using SINCOM software

Combination of GNSS and VLBI data for consistent estimation of Earth Orientation Parameters

Inter- and intra-technique evaluation of UT1-UTC estimates using Legacy S/X VLBI, VGOS and their combination with co-located GNSS. A case study comparing INT1 to VGOS-B sessions

Earth rotation parameters estimation using satellite laser ranging measurements to multiple LEO satellites

Identify the Multi-technology systematic errors: the relations among reference point determination, telescope pointing calibration and VLBI observing

Discussion

What can long-term trend estimates from satellite gravimetry contribute to climate research?

Recovering Climate-Related Mass Transport Signals by current and next-generation gravity missions

Land Water Storage Variabilities in GRACE and Climate Models – How do they compare and which future changes can we expect?

Assessments of integrated water vapor from atmospheric reanalyses against ground-based GPS over Europe

GNSS for the Global Climate Observing System: Precipitable Water Vapor Processing Centre at GFZ

Evaluating hydrological angular momentum determined from CMIP6 historical simulations

Investigating the relationship between Length of Day and El-Nino using wavelet coherence method

Discussion

Solid Earth Deformation Sensing Using Multi-Decadal Satellite Altimetry

Contribution of glacier mass loss to river runoff in the source region of the Yangtze River during 2000-2018

High-Performance Clock Networks and Their Application in Geodesy

Towards a transportable aluminum ion quantum logic optical clock for relativistic geodesy

Towards high-precision International Height Reference System Using Two-Way Space Laser Time Transfer Link

Defining a unified height system for Egypt using the ACES microwave links

ESA Activities and Perspectives on Quantum Space Gravimetry

Discussion

The Benefit of Accelerometers based on Cold Atom Interferometry for Future Satellite Gravity Missions

Gravimetry by nanoscale parametric amplifiers driven by radiation-induced dispersion force modulation

The Application Sagnac Interferometry in the Geosciences

Characteristics of Novel Differential Lunar Laser Ranging Compared to Classical Lunar Laser Ranging

Overview of the GNSS-A Seafloor Geodetic Observation Array (SGO-A) in the subduction zones around Japan, operated by the Japan Coast Guard

Further evaluation of the impact of Earth's curvature on coastal sea level altimetry with ground-based GNSS Reflectometry

Outlier Detection Based on Epoch-differential for Seafloor Geodetic Positioning

Discussion

A CFD-based gravitational field modeling method and its potential applications in deep space exploration

Crustal density and forward global gravitational field model on the Moon determined from GRAIL and LOLA satellite data

Sensitivity of GNSS orbits to General Relativistic effects

Inclusion of data uncertainty in machine learning and its application in geodetic data science

Adaptive Quasi-Monte Carlo Algorithm for Covariance Propagation of GNSS Baseline Vector

Bayesian modelling of discontinuities and piecewise trends (trend changes) improves coastal vertical land motion estimates

A new robust estimation algorithm for the superstrong breakdown point based on Quasi-Accurate Detection

Discussion

Advanced estimation of regional ice mass losses in Greenland from GRACE data

Inter-annual variability in the Antarctic ice sheets using multi-technique geodesy and modeling

Antarctica Ice-Mass Variations on Intraseasonal-Interannual Timescale: East-West Coastal Dipole and Eastward Circumpolar Wave

Filling the data gaps within GRACE missions using Singular Spectrum Analysis

Bridging the data gap between GRACE and GRACE-FO using artificial neural network in Greenland

Two decades of Antarctic surface elevation changes from multi-mission satellite altimetry and gravimetry

New Constrains on Glacier Mass Balance on High Mountain Asia

Discussion

Performance of Five Satellite Altimetry Observations in Marine Gravity Inversion over the Gulf of Guinea

Optimal gravity anomaly and vertical gravity gradient in the South China Sea from multi-altimeter data

DTU21 Mean Sea Surface for Vertical Offshore Reference Frame

Altimeter-derived marine gravity variations reveal the magma mass motions within the subaqueous volcano

Radar Altimeter-Based Water Level and Wind Speed Monitoring Over the Laurentian Great Lakes

Quantitative Analysis of Global Sea-Level Budget Based on GRACE, Satellite Altimetry and Argo Observations

Global Ocean Mass Change Estimates in 1993~2004 from LEO Gravity Field Models Determined at Tongji University

High-resolution water level changes in coastal and estuarine regions in North Sea and Baltic

Retracking of radar altimetry waveforms over inland water bodies

Discussion

Gravity response to a monsoonal rain event in the Pingtung Plain, southern Taiwan

Monitoring fast water storage variations in Karst through gravimetry: a study case from the Classical Karst

Quantifying water storage change over Lake Baikal using GRACE and GRACE Follow-On

Recent Changes in Surface and Groundwater in Large Arctic River Basins

Monitoring groundwater storage change in China by satellite gravimetry

Using Swarm to Detect Total Water Storage Changes in 26 Global Basins (Taking the Amazon Basin, Volga Basin and Zambezi Basin as Examples)

Reconstructing Climate-driven Water Storage Anomalies using GRACE Satellite Data

Discussion

Inversion of Regional Surface Mass Anomalies using GRACE Geopotential Differences Based on Slepian Basis Functions

Regional inversion of GRACE/-FO KBRR/-LRI observations to estimate high resolution total water storage changes

Mass change And Geosciences International Constellation (MAGIC) – An ESA/NASA joint mission in preparation

Simulation studies for a Mass change And Geosciences International Constellation (MAGIC) – An ESA/NASA joint mission concept in preparation

GRACE-I mission for gapless observation of mass transport and biodiversity

Simulations of the Next Generation Gravity Field Missions Based on Multi-Pair Constellations and Status of Chinese TianQin Mission

Climatological, tectonic and volcanic gravity signals compared to the sensitivity of the proposed MOCAST+ gravity mission

Discussion

Closing Ceremony

Introduction

Statistics of the Assembly

Photo Session

Symposium 1: Reference Frames

Symposium 2a: Earth's Static Gravity Field

Symposium 2b: Earth's Time-variable Gravity Field

Symposium 3: Earth Rotation and Geodynamics

Symposium 4: Positioning and applications

Symposium 5: Global Geodetic Observing System (GGOS): the metrological basis for the monitoring of the System Earth

Symposium 6: ICC symposium (ICCT, ICCC, ICCM, QuGe)

Proceedings of the IAG Scientific Assembly

Closing the 2021 IAG Scientific Assembly

Current status and future improvements of digital zenith camera VESTA

Recent results of strapdown dynamic gravimeter on different platforms

Recent Airborne Gravity Surveys in Denmark with Strapdown Technology

Results from a car-based 3D-strapdown gravimetry campaign in the Bavarian Estergebirge

An approach to airborne vector gravimetry based on spherical scaling functions

The convergence of gravity change rates from repeated absolute gravity measurements

Evaluation of the Muquans Absolute Quantum Gravimeter AQG-A02 against a precise gravity reference

Discussion

Iterative refinement of regional marine geoid models by using sea surface height and dynamic topography datasets

On the Optimum DHM Resolution for the Window Remove-Restore Technique: Case Study for Africa

Integrating NGS GRAV-D gravity observations into high-resolution global models

Regularization parameter determination in case of combining different types of gravity data for regional gravity field refinement

Application of 3-dimensional least-squares collocation for free-air vertical gravity gradient modelling

Modernization of the Danish Gravity Network in Preparation of the New 5 mm Danish Geoid

Seamless Processing for Shipborne Gravity Data

Discussion

A 3-Dimensional Realization of Molodensky Heights

An improved regional gravity field solution for Antarctica for geodetic and geophysical applications

Indian gravimetric geoid model: IndGG-CUT2021

DTU21 Global high resolution gravity field - first evaluation

XGM202x: The impact of extending the dense modelling to d/o 1440

Establishment of the global geoid model 2021 (GGM2021)

Joint modelling of the lithospheric and deep Earth gravity field to study the density structure of the lithosphere

Discussion

Harmonic Correction for Residual Terrain Modelling (RTM) Technique in Physical Geodesy Applications

Topographic gravity field modelling for improving high resolution global gravity field models

Status of the International Height Reference Frame (IHRF)

Geodetic SAR for Height System Unification and Sea Level Research - Observation Concept and Results in the Baltic Sea

Chronometric Height: a genuine general relativistic definition of height measures

First attempt to establish connection between the Russian height system and the International Height Reference System (IHRS)

Realization of the International Height Reference System in the region of Mount Qomolangma (Everest)

Discussion

Mapping the upper mantle thermochemical heterogeneity from coupled geophysical-petrological inversion of seismic waveforms, heat flow, surface elevation and gravity satellite data

Improving the GEMMA inversion algorithm towards a new release of the GOCE-based crustal model

The contribution of gravity to crust and upper mantle structure modeling – an example in Tibet Plateau

Crustal configuration of the West and Central African Rift System from gravity and seismic data analysis

Crustal geological provinces seen by gravity field data: an automatic Bayesian approach applied to the Central Eastern Mediterranean area

Horizontal deformation of GNSS on the improvement of mass load inversion

Comparison of GRACE and GNSS seasonal load displacements considering regional averages and discrete points

Discussion

Status of temporal gravity field modeling at HUST

Combination Service for Time-variable Gravity fields (COST-G): operations and new developments

Combined gravity solution from SLR and GRACE/GRACE-FO

On the combination of gravity field time series derived from kinematic positions of Low Earth Orbiting satellites

Data-Driven Self-De-Aliasing approach for monthly GRACE and GRACE-FO gravity retrieval

Time-variable Gravity Signals in Reprocessed GOCE Gradient Data

On Validating the Swarm Data to Fill-in the GRACE/GRACE-FO Gap Employing Artificial Neural Networks Applied to Africa

Discussion

Coordinating global geodesy in Japan: GGOS Japan

RAEGE: a Spanish-Portuguese infraestructure of geodetic stations

Probing a southern hemisphere VLBI intensive baseline configuration for dUT1 determination

Systematic errors in SLR observation residuals to Swarm satellites

The development of spaceborne interferometric synthetic aperture radar missions in China

Absolute Positioning of Active Radar Transponders from Sentinel-1 Observations — Experiences and Results

Optimizing GNSS RTK Infrastructure from the perspective of tropospheric effects

Discussion

Progress of International Gravity Reference System and Frame

The pole tide in terrestrial gravimetry

Evaluation of the gravity reference function at the Borowa Gora Observatory

New GGOS Website – An Extensive Information Platform about Geodetic Products, Observations and Services

Defining Essential Geodetic Variables

On the Earth dynamical ellipticity

Geodetic Analyses at the National Geographic Institute of Spain. Current and future projects and prospects

Discussion

Ground and spaced based GNSS for Space Weather Monitoring at GFZ: Overview and Recent Results

An enhanced mapping function for spaceborne TEC conversion based on the plasmaspheric scale height

Detection of ionospheric disturbances by modelling the electron density as three-dimensional B-spline expansions: a simulation study

SWEETS – forecast of satellite orbit decay using L1 interplanetary magnetic field measurements and thermospheric density estimates.

Forecasting Global Thermospheric Neutral Density through Calibration and Data Assimilation of GRACE Measurements into the NRLMSISE-00 model

Ensemble Machine Learning for Geodetic Space Weather Forecasting

Deep Learning for Global Ionospheric TEC Forecasting: Different Approaches and Validation

Discussion

Crustal response to heavy rains in Japan 2017-2020

Long-period Accuracy Evaluation and Spatial-temporal characterization Analysis of Global GNSS-derived Precipitable Water Vapor

Temporal error covariances of satellite gravimetry-derived ice mass change products

Penetration Depth Inversion in Hyper-Arid Desert from L-band InSAR Data Based on a Coherence Scattering Model

On the assessment of ERA5 and GPS-based WRFDA for InSAR Atmospheric Correction

Analysis of the crustal deformation characteristics of Mount Everest and Tibetan region in the past 20 years

Monitoring phosphate mining induced landslides in karst mountainous area using multi-temporal InSAR

Discussion

Quantifying glacier displacement and glacial lake outburst floods with SAR and optical images: A case study in Jinweng Co Lake, Tibet, China

Landslide detection, monitoring and failure mechanism research in Guizhou Province, China with multi-sensor SAR datasets

Spatio-temporal variations of afterslip and viscoelastic relaxation following the Mw 7.8 Gorkha (Nepal) earthquake

Lessons Learned from the 2020 Uzbekistan Sardoba Dam Failure: An Imaging Geodesy Perspective

CyCLOPS: A National Integrated GNSS/InSAR Strategic Research Infrastructure for Monitoring Geohazards and Forming the Next Generation Datum of the Republic of Cyprus

The new pilot system for Earthquake and Tsunami Risk Estimation by ionospheric sounding (ETREbis) at the IPGP Caribbean observatories

Comparing Natural Hazards Assessment using Satellite Imagery Data and Geodetic Earth Observation Data

Discussion

The UN Global Geodetic Centre of Excellence (GGCE)

GGOS D-A-CH – A new regional affiliate of the Global Geodetic Observing System

Embracing challenges through national, regional & international partnership in the Pacific

SIRGAS and GRFA WG UN-GGIM: Americas interactions for sustainable geodesy

Group on Earth Observations (GEO) Disaster Risk Reduction (DRR) WG

News from the GGOS DOI Working Group

Status and Future Development of GNSS enhancement of Tsunami Early Warning Systems (GTEWS)

Discussion

IAG JWG 4.3.1 Real-time Ionosphere Monitoring and Modeling: Status during 2019-2021

Near Real-Time Global Ionospheric Modeling Based on Multi-GNSS and Virtual Observation Stations

Spatial-temporal evolutional behaviors of global ionospheric response to severe storms on 7-8 September 2017 using the GNSS, SWARM, COSMIC and TIE-GCM techniques

Extracting ionospheric phase scintillation index from 1 Hz GNSS observations

Detection of earthquake and tsunami signatures in the ionosphere from the combination of different observation techniques

Alternative ionospheric correction algorithm for Galileo single frequency users

Analysis of the BDGIM Performance in BDS Single Point Positioning

Discussion

Multi-GNSS Meteorology: Computation of tropospheric delays and gradients at GFZ Potsdam

Application of the Total Variation Method in near real-time GNSS Tropospheric Tomography

Evaluation of shipborne GNSS precipitable water vapor from six cruises based on multiple datasets

Determination of water vapor content using low-cost dual-frequency GNSS receivers

TropNet: A deep spatio-temporal model for tropospheric parameters forecasting

Tomographic fusion strategies for the reconstruction of atmospheric water vapor

Improving the global estimation of zenith wet delay and weighted mean temperature with machine/deep learning methods

Discussion

Current status of the IAG working group 4.3.7 on geodetic GNSS-R

From spaceborne to ground-based polarimetric observations: Is precipitation detectable in GNSS reflected signals?

Feasibility of GNSS-R Altimetry Using CyGNSS 8-Satellite Constellation Mission Data

Further evaluation of a GNSS-R synthetic vertical array for high-rate water level altimetry

Mitigating Long Wavelength Ocean Tide Loading Effects on InSAR Observations Over Wide Regions

Soil moisture retrieved using multi-constellation and multi-frequency GNSS signals

Comparison of the Effective Isotropic Radiate Power parameter in CYGNSS v2.1 and v3.0 level 1 data and its impact on soil moisture estimation

Discussion

Kinematic determination of state-space representation corrections for unified RTK and PPP-RTK solutions

Investigation of the informativeness of the gravity field for indoor navigation

Facial Feature Recognition Based on Deep Neural Network

A 3D map based place recognition solution for underground positioning using laser scanning

Towards collaborative positioning of pedestrian and UAS platforms by integrating vision, UWB, and IMU data

A cloud platform and hybrid positioning method for Indoor location service

Decentralized information filter with delayed states for cooperative location of UUVs

Discussion

Precise positioning using low-cost dual-frequency GNSS receivers

Performance Analysis of a Low-cost MARG Sensor/Single-antenna GNSS System for Land Vehicle Attitude Estimation

How much does the price matter? Real-time geohazard monitoring with low-cost GNSS

Ambiguity-fixed relative positioning with GNSS dual-frequency observations of Huawei Mate20 smartphones

An enhanced foot-mounted PDR method with adaptive ZUPT and multi-sensors fusion for seamless pedestrian navigation

Network RTK performance analysis on moving vehicle in challenging environments

Integer-estimable FDMA model as an enabler of GLONASS PPP-RTK

Discussion

Quality control of outlier detection, identification and adaptation in GNSS positioning

INS/Visual Odometry aided GNSS data gap repairmen in urban environment

Robust RTK method for short baselines with high sample rate

Multi-level augmentation and highly reliable BeiDou/GNSS precise cloud positioning and space atmospheric effect control

High-rate hourly ultra-rapid multi-GNSS precise clock estimation

Study on the stability of GNSS ISB

Discussion

Non-isotropy of the troposphere and its effect on the long-rang RTK

Establishing a new method for heavy precipitation detection using optimal anomaly-based thresholds of predictors derived from GNSS-PWV

An improved tropospheric mapping function modeling method for space geodetic techniques

GNSS real-time troposphere monitoring

A modified global tropospheric delay model considering diurnal variation

Multi-GNSS code biases: from the perspectives of DCB and OSB

A new strategy of tropospheric gradient estimation and its application in GNSS PPP

Discussion

ADDTID: An Efficient Tool for Characterizing Travelling Ionospheric Disturbances

Estimation of the ionospheric VTEC and satellite DCB from BDS single‑frequency PPP with multi‑layer mapping function

Estimation and Validation of Codephase Center Correction using the Empirical Mode Decomposition

On the Potential of Image Similarity Metrics for Comparing Phase Center Corrections

Characteristics of BDS-3 multipath effect and its mitigation methods in precise point positioning

Recognition of periodic signals in coordinate time series from GPS, GLONASS, and Galileo Precise Point Positioning

Research on LEO constellations enhancing GNSS orbit determination and precise point positioning

Discussion

A new ambiguity resolution method for single-receiver LEO precise orbit determination

A simplified reduced dynamic orbit determination for LEOs with orbit variation constraints

LEO’s Contribution on Ambiguity and Positioning Convergence in Urban Canyons

Performance Analysis of GNSS Augmented by LEO Constellation

Rapid earthquake rupture process inversion with real-time high-rate GPS displacements

Rupture process variations analysis of the 2020 Mw7.4 La Crucecita, Oaxaca, Mexico Earthquake using high-rate GPS, InSAR and Teleseismic data

Validation and Evaluation of BDS-3 PPP-B2b service

Discussion

Chandler wobble excitation by external geophysical fluids estimated from GRACE gravity data

Effects of the observed Earth’s oblateness variation on precession-nutation: A first assessment

The Earth and Mars’ Variable Rotations Excited by Surficial Fluids

Why the Earth accelerates its rotation since 2016?

Long-Range Predictability of the Length of Day and Extratropical Climate.

Surface mass balance loading displacement as a dominant source of error in GPS estimates of Antarctic glacial isostatic adjustment and its relevance to a critical sector of East Antarctica

Spatio-temporal evolution of the Greenland ice sheet and associated deformation of the Earth: a multi-technique geodetic approach

Discussion

Bedrock uplift in response to recent ice-mass variability on northern Marguerite Bay, Antarctic Peninsula

The mid-Holocene sea-level highstand and Glacial Isostatic Adjustment modelling

Spatiotemporal glacial isostatic model resolution testing for small ice loads: Input parameter recommendations and examples for mountain galciers in southcentral and southeast Alaska

Crustal rheology and heterogeneity impact on tectonic stress characteristics of North China revealed by GNSS observations

InSAR-derived earthquake catalog: Source locations and focal mechanisms of 30+ earthquakes (Mw4.1-6.6) in west China from time-series Sentinel-1 SAR images

Complementary afterslip process following the 2016 Mw 7.8 Kaikoura earthquake from ~4 years GPS observations and its implication for seismic hazard

Causative fault geometries of two blinded dip-slip earthquakes in the interior of Asia Continent revealed by InSAR

Discussion

Grey Wolf Optimal Combination Algorithm for Inversion of Seismic Source Parameters: A Case Study of the Bodrum-Kos earthquake in 2017

Time-dependent Modeling of the Long-lasting Afterslip due to the 2016 Moderate Earthquakes along Chaman Fault using InSAR Time Series

Horizontal and vertical deformation rates linked to the Magallanes-Fagnano Fault System, Tierra del Fuego: interpretation of the geodetic observations in the context of geological evidence and the current seismic cycle

Monitoring The Activity of Changbaishan Tianchi Volcano with Time Series InSAR and Geophysical Modeling

Estimation and correction of error sources in MTInSAR

On the detection of structural breaks in GNSS station coordinate time series caused by earthquakes using machine learning

Discussion

A Study on Differencing Approaches for SLR Observations

Assessment of Local VLBI Baselines: The Wettzell Case

Close Range Photogrammetry for High Precise Reference Point Determination – A proof of concept at Satellite Observing System Wettzell

Radar Corner Reflector installation at the OCA geodetic Observatory (France)

Datum problem in terrestrial local ties

Intra- and Inter-Technique Atmospheric Ties: Derivation, Implementation, and Results

Differences in geocenter coordinate estimates delivered from GPS, GLONASS, and Galileo

Determination of Galileo and GLONASS orbits based on combined SLR and GNSS data

SLR station range bias and coordinate determination using independent multi-LEO DORIS- and GNSS-based precise orbits

Combination of SLR observations to LEO, LAGEOS, LARES, and GNSS satellites

Examining the optimal depth of the condensed topographic masses for precise geoid determination based on the Stokes-Helmert scheme – A case study in Colorado

Local gravity field modelling in spatial domain using the FEM approach on the discretized Earth's surface: case study in Slovakia

Gravimetric Geoid Modeling by Stokes and Second Helmert’s Condensation Method in Yogyakarta, Indonesia

Preliminary results of the spatial distribution of tidal factors measured by recent continuous gravity stations

Improved geoid models in Taiwan and its offshore islands

Gravimetric quasigeoid modelling by the GGI method in the Colorado mountains area

On the computation of the complete geoid-quasigeoid separation term for the experiential geoid 2020

A new model of the quasigeoid for the Baltic Sea area

The improvement of global earth’s gravity field model with airborne gravity data: case study in Maowusu

Assessments on Terrestrial Gravity Data Grid Densification and Its Effects on Local Geoid Modeling Accuracy

Gravimetric Geoid Modelling Using the Least Squares Modification of Hotine Integral in Turkey

Filtering and downward continuation of GOCE SGG data for regional geoid improvement

An oral rebuttal to “the shape of the quasigeoid”

Towards an European Deformation Model

ADELA :Analysis of DEformation beyond Los Andes(2009-2021). The urgency to change from static to kinematic in any geodetic reference frame for Chile

A three-dimensional crustal velocity field in mainland China from denser permanent GPS networks

Crustal block modelling using a combination of Euler pole and cluster analysis of GNSS velocities in Greece

GEODETIC DATUME TRANSFORMATION WITH THE MINIMUM CURVATURE SURFACE INTERPOLATION APPRROACH in IRAQ

Frame accuracy of daily/weekly combined EPN solutions

ITRF densification in Cyprus

BEV DC 2.0

Extraction of common mode error of GNSS coordinate time series in Xinjiang with independent component analysis

Astronomy VLBA campaign MOJAVE used in geodesy

Automatic detection of offsets in GNSS station position time-series using DIA and multivariate analysis algorithm

The NTSC geodetic VLBI system and its application of UT1 measurements

Estimation of Earth rotation parameter UT from Lunar Laser Ranging observations

Geodetic VLBI observations in single-frequency mode with 30-meter Warkworth radio telescope

Numerical Algorithm and Realization of Ellipsoidal Harmonic Expansion of the Earth Gravity Field

On the Fast Computation of Model Gravity Gradient Tensor

Analysis of the potential contribution of the Tianwen-1 extended mission to the solution of Mars' low-order gravity field

Reconstruction of mathematical foundations for satellite gravimetry from tracking: solutions to problems incorrectly solved for 100 years

Bathymetry of northeast Greenland revealed by Oceans Melting Greenland (OMG) airborne gravity

The omission error modelling of global gravity field models using different digital terrain models

Marine Gravimetry, Ship Sounding and Ocean Bottom Topography Estimation in the South-western Coastal Area of the Baltic Sea

Multipath Characterization using Ray-Tracing in Urban Trenches

Analysis of BDS Two-way Time Synchronization

GNSS positioning accuracy of smartphones and sports watches

VISION BASED NAVIGATION IN INDOOR ENVIRONMENT: EVALUATION OF PERFORMANCE USING SMARTPHONE SENSOR

Geomatics and Soft Computing techniques for road infrastructure monitoring: a case study

Fusion of GNSS/INS and Maps for lane-level vehicle navigation

Robust constrained Kalman filter with GNSS/INS vehicle tightly coulpled navigation application

A State-Domain Robust Fault Detection Algorithm for GNSS/INS Integration Positioning

Can the Earth Gravitational Model augmented by the Topographic Gravity Field Model realize the International Height Reference System accurately?

An overview of SIRGAS activities towards the IHRF

An Investigation on the Geoid-Quasigeoid Separation with the Case Study in Colorado, U.S.

GEOPOTENTIAL NUMBER FOR THE IHRF ESTABLISHMENT IN BRAZIL

Estimation of vertical datum parameters of Hong Kong using the GBVP approach based on combined global geopotential models

Using kriging interpolation for local geoid construction: accuracy evaluation in dependence of point density

Recent activities of the JWG 4.3.4 - Validation of VTEC models for high-precision and high resolution applications

Near Real-time Regional Ionospheric Modeling and Navigation Enhancing

ASHAK: Adjusted Spherical Harmonic and Kriging method for Regional Ionospheric TEC Modeling

BDS/GNSS Atmospheric Monitoring And Retrieval Terminal (BDSMART): Progress and Experiment

A New Method of Predicting the Global Ionospheric Map

An improved method for real-time tropospheric delay modeling with a regional GNSS network

An operational GNSS processing system for near-real-time tropospheric ZTD and IWV monitoring in South America: breaking the 2-hour lateness barrier!

High-precision SLR tropospheric zenith delay prediction

The inversion, characterization and assessment of 3-D water vapor using tomography during typhoon weather over Hong Kong

Estimation of 4D Atmospheric Water Vapor from GNSS and Infrared Sensor Data: A Combined Tomography Approach

Sensitivity of ship-borne GNSS troposphere retrieval to processing parameters

Development of the next-generation GNSS-Meteo stations

Bounding the Residual Tropospheric Error by Interval Analysis

An enhanced atmospheric model of integrating GNSS CORS network and ERA5 for augmenting PPP-RTK

Analysis of tropospheric estimates from multi-frequency low-cost GNSS receivers

A global latitude zone weighted mean temperature (Tm) augment method for empirical Tm model

Spatial-Temporal Characteristics of the Tropopause Height over Global Tropical and Subtropical Regions Using COSMIC-2 Radio Occultation Data

An empirical zenith wet delay model using piecewise height functions based on a sliding window algorithm for China

Sea level estimation using signal strength indicator data based on GNSS multipath reflectometry

GNSS-R coastal sea level altimetry with an open-source low-cost sensor: initial evaluation of high elevation angle satellites

Multi-mode multi-frequency GNSS-IR combination method for water level retrieval

GNSS-R monitoring of St. John river water levels: implementation and first results

InSAR modeling and deformation estimation for drilling soluble rock salt mine based on CT-PIM function

The 2021 Local Ties Campaign at GRAZ

Local Ties at SLR station Riga

Shimosato co-location of the SLR and GNSS stations

Evaluation of the IGS contribution to ITRF2020

Geodetic VLBI data processing of the specific experiments

The impact of the EOT20 global ocean tide model on space geodetic measurements, satellite orbits and derived geodetic parameters

Assessing daily and sub-daily ocean tidal loading displacements using GPS, Galileo, and GLONASS observations

Densification of the VLBI network in the Southern hemisphere: advanced simulation for a VLBI antenna on Tahiti

Modelling and prediction of GPS time series with machine learning approaches

Denoising method of elevation time series based on CEEMD algorithm and time-lapse multi-scale permutation entropy

The cross-correlations of the Helmert transformation parameters as an additional diagnostic tool for Terrestrial Reference Frames assessment

Observation density method for selecting independent baselines in GNSS network

A Refined Global GNSS Velocity Field Modeling Station Seismic Deformation based on Constrained Nonlinear Optimization

Periods Extraction of GNSS Coordinate Time Series Based on Significance Level

A Magnetic Field Calibration Approach to Mitigate Accelerometer Errors in Strapdown Gravimetry

Strapdown airborne gravimetry: postprocessing algorithms and some results

Moving base gravimetry on a land vehicle: The first results from a short traverse drive in central Turkey

Determination Of The Vertical Gravity Gradient At A Few Sites Of The Absolute Gravity Network Of Algeria

Validation of the Hellenic gravity network in the frame of the ModernGravNet project

Preliminary Results of a Gravity Observing experiment at 848m under the earth surface

Extracting Long‐Period Surface Waves Using Ambient Noise Data Recorded by Superconducting Gravimeters

The Airborne Gravity Measurement for Development of a New Precise Gravimetric Geoid Model in Japan

Gravity anomalies of large lakes from ICESAT-2 laser altimetry.

Using the spaceborne GNSS-R coherent signals to detect the flood of South Asia

Sea-ice signatures in coherently reflected GNSS signals: Findings from the MOSAiC expedition

Fast Snow Water Equivalent estimation with GPS interferometric reflectometry (GPS-IR) snow depth

Detection of snow depth on the Tibetan Plateau by satellite-based GNSS-R

Satellite-based GNSS-R: A New Tool for Flood Monitoring —— Flood monitoring of the Yangtze River Basin in 2020 using CYGNSS data

Remote Sensing of Soil Moisture using Spaceborne GNSS Relectometry Measurements

Cross-polarization Correction for Soil Moisture Retrieval Using GNSS SNR data

The gridded tide corrections of the long-strip differential InSAR measurements estimated using the GPS network and tide models

An alternative MTInSAR framework for deformation retrieval over areas with heavey decorrelation

Based on InSAR Monitoring and Discrete Element Numerical Simulation Research on the Damage Trend Mountain Deformation in Jinsha River Basin

Based on Sentinel-1A images revealing the co-seismic and post-seismic deformation mechanism of the Ms6.4 Jiashi earthquake in Xinjiang in 2020

The Study of the Coupling relationship between Land subsidence and Resources and Environmental carrying capacity in Plain area of Beijing

Landslide Detection and Segmentation Using Mask R-CNN with Simulated Hard Samples

Land subsidence monitoring in Tongzhou and Three Northern Counties of Langfang based on time series InSAR Technology

Research on segmented fitting ranging model based on multiple filter

Virtual Reference Station Technology in Geological Hazard Monitoring

Adaptive Stochastic Model Based on LS-VCE for GNSS Kinematic Precise Point Positioning

Accuracy analysis of GNSS multi-system single point positioning algorithm with different cut-off altitude angles

BDSBAS-B1C Service Performance Evaluation Model and Experimental Analysis

A New Underwater Positioning Model Based on Average Sound Speed

The evaluation of position and attitude accuracy for MS GNSS receiver with SD algorithm

BDS-3 SISRE assessment as well as comparison between D1 and B-CNAV (B-CNAV1, B-CNAV2 and B-CNAV3) navigation messages

The estimation of inter-receiver pseudorange biases and its impact on the BDS-2 GEO satellite precise orbit determination

Assessments on multi-GNSS real-time precise point positioning

On the Limits of State-of-the-art GNSS Receivers in Frequency Transfer

Precise orbit determination for FY3D satellite using onboard BDS and GPS observation data and orbit forecast accuracy analysis

Optimal kernel functions of Gaussian process regression for TEC prediction on the Ring of Fire region

The importance of geodetic infrastructure and its connection to the UN 2030 Agenda

GGOS Bureau of Networks and Observations: Network Status and Related Activities

ILRS: Recent Progress and Plans

Status of the future GGOS core site Metsähovi, Finland

VLBI-GNSS co-location at the Ishioka Geodetic Observing Station

Determination of the Earth's mantle structure based on a joint analysis of gravimetric and seismometric earthquake recordings at the Borowa Gora Geodetic-Geophysical Observatory

New Daily Coordinates of GNSS CORS in Japan Based on the GEONET 5th Analysis Strategy

Interoperability of the GGOS-PL infrastructure in the framework of EPOS-PL+

Development of Wideband Receiver for Novel Ground-based Microwave Radiometer -field experiments of the new 20-60 GHz wide-band receiver and its implications to new development of the wide-band VLBI receiver-

Two-dimensional mining surface deformation monitoring and accuracy analysis of ascending and descending SBAS and MSBAS InSAR

Accuracy evaluation of gravity continuous observation at key comparison site of absolute gravimeter

Four Achievable Control Schemes for Inertial Reference System in Space

The SUT Method for Precision Estimation of Mixed Additive and Multiplicative Random Error Model in Geodetic Measurement

Novel Sensors and Quantum Technology for Geodesy (QuGe)

The MOCAST+ study: proposal of a quantum gravimetry mission integrating atomic clocks and cold atom gradiometers

A Simplified Comparison Between Two Proposed Designs for a Future Earth Gravity Mission With and Without Strongly Reduced Non-Gravitational Acceleration Noise Level Requirements

Kalman-filter Based Hybridization of Classic and Cold Atom Interferometry Accelerometers for Future Satellite Gravity Missions

Gravity data acquisition with the transportable absolute Quantum Gravimeter QG-1

Status of gravimetric measurements and modelling along a 10m atom interferometer

Improved evaluation of the transportable strontium lattice clock at PTB for chronometric leveling

A geodetic determination of the gravitational potential difference toward a 100-km-scale clock frequency comparison in a plate subduction zone

Determination of the geopotential difference and orthometric height difference based on the two-way satellite time transfer observations

Geopotential difference determination by TWSTFT

Unifying the world height system based on gravity frequency shift equation via optic fibers

Higher order ionospheric effects on microwave frequency transfer between spacecraft and ground station

A Method of Determining Moho Topography from On-orbit GOCE Gravity Gradients: A Case Study in Tibetan Plateau

Research on the basement depth of Sichuan basin with real gravity data

Correlation between gravitational and magnetic anomalies and crustal susceptibility in the Three Gorges area, China

Possible Deep Structure and Composition of Venus with Respect to the Current Knowledge from Geodetic Data

Vertical Deformation Analysis with GNSS and GRACE Data in North China Using Independent Component Analysis

Coseismic gravity changes of the Wenchuan earthquake observed by surface gravimetry