Real Time Global Navigation Satellite System

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* Date last updated : 2025.08.28

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Company Name Dong-A Geovan Co., Ltd.
Membership TradeVerify
Registration Date2003.03.29
Country/RegionKorea
CityGijang-gun
Contact Jessica Lee(Ms.)
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Product Attributes

- Place of Origin Korea
- Supply Type In-Stock Items
- Condition New
- Related Keywords satellite tracking

Description by Manufacturer

Real Time Global Navigation Satellite System

Monitoring Ground Displacement in Dams, Levees, and Soft Ground Using GNSS with Sub-Centimeter Accuracy

To monitor ground displacement in structures such as dams, levees, or areas with soft ground, high-precision GNSS (Global Navigation Satellite System) techniques can be employed. These methods are capable of detecting movements with an accuracy of less than 1 cm, particularly when combined with post-processing.

High-Precision GNSS Equipment

Use dual-frequency (L1/L2 or L1/L5) GNSS receivers and geodetic-grade antennas capable of tracking signals from multiple satellite constellations (e.g., GPS, GLONASS, Galileo, BeiDou). These receivers are typically installed on fixed monitoring points across the structure.

Static GNSS Surveying

For the highest accuracy, static GNSS surveying is used. This involves collecting raw satellite data over extended observation periods (often from 30 minutes to several hours, depending on baseline length and required accuracy).

Reference Stations

Establish a nearby reference station with known coordinates (either from an existing continuously operating reference station (CORS) or a dedicated base station). The relative position between the reference and the monitoring points is calculated to eliminate common errors (e.g., atmospheric delay, satellite clock errors).

Post-Processing

Post-processing software (e.g., open-source tools like RTKLIB) is used to analyze the collected raw data. Differential GNSS or precise point positioning (PPP) methods can be applied depending on the availability of correction data.
- Differential GNSS(DGNSS/RTK) : Provides high relative accuracy by processing data from both the base and rover stations.
- PPP : Uses precise satellite orbit and clock information to determine absolute positions with high accuracy, often used when no nearby base station is available.

Displacement Analysis

By comparing the processed coordinates over time, it is possible to detect and quantify ground movements. These can be monitored in 3D (horizontal and vertical displacements). The sub-centimeter level of precision allows for early detection of structural deformations or potential failures.

Applications

The Geovan GNSS technique is widely used in :

Deformation monitoring of embankment dams and levees
Settlement analysis of soft ground or reclaimed land
Long-term structural health monitoring of critical infrastructure

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Real Time Global Navigation Satellite System

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Company Profile

About Dong-A Geovan Co., Ltd.

Membership
Registration Date2003.03.29
Country/RegionKorea
CityGijang-gun
Contact Jessica Lee(Ms.)

We, Dong-A Geovan is offering various types of special purpose instruments to monitor subtle displacement of structure and ground movement.

Our goal is to provide optimized soultion just in time.

Especially Geovan's products such as ABS Inclinometer Casing, Load Cell, VW Strain Gage, Wirelss Data Logger, EL Tiltmeter etc will guide you to meet successful projects.

Should you have any questions, Please contact us at anytime.

Thank you.

Selling Categories

- Construction & Real Estate >> Other Construction & Real Estate
- Electrical Equipment & Supplies >> Other Electrical Equipment
- Electronic Components & Supplies >> Other Electronic Components

Keywords

inclinometer , inclinometer casing , tiltmeter , strain gauge , piezometer , embebment strain gauge , Bentonite Chip

Registration Date	2003/03/29(Year/Month/Date)
Buyer / Seller in EC21	Seller
Business Type	Manufacturer
Year established	1996
Employees total	101 - 500
Annual revenue	USD 5,000,001 - 10,000,000

Contact Information Order Credit Report

Company	Dong-A Geovan Co., Ltd.
Address	40, Ballyongsandan 2-ro, Jangan-eup,Gijang-gunBusan46034Korea
Phone	82 - 51 - 3155067
Fax	82 - 0504 - 3320963
Homepage	www.geovan.com
Contact	Jessica Lee / CEO

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Real Time Global Navigation Satellite System

Product Attributes

Description by Manufacturer

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