DGPS Surveying

Centimeter-accuracy with real-time RTK — for topographic mapping, dam surveys, infrastructure, and environmental monitoring.

High-Precision Survey Ecosystem

GNSS Base Station

A high-precision receiver mounted on a survey tripod is used for accurate geospatial data acquisition in field surveying operations. The receiver collects signals from multiple satellite constellations such as GPS, GLONASS, Galileo, and BeiDou to determine precise three-dimensional coordinates.

Primary Role

When configured as a DGPS base station, it calculates positional corrections and transmits them to rover receivers in real time, enabling centimeter-level positioning accuracy.

Trimble TSC3 Controller

The Trimble TSC3 Survey Controller is a rugged handheld data collector designed for professional GNSS and total station surveying operations. It operates with field software such as Trimble Access, enabling real-time data collection and management.

Primary Role

Built for demanding environments, the TSC3 features a sunlight-readable display, full keypad interface, and durable field-ready design, making it ideal for topographic mapping.

Trimble R10 Receiver

Trimble R10 is a high-precision GNSS receiver used in surveying to collect accurate geospatial positioning data. It receives signals from multiple constellations enabling precise determination of 3D coordinates in real time.

Primary Role

Equipped with advanced multi-frequency signal tracking and a rugged field-ready design, it delivers centimeter-level positioning accuracy for topographic and reservoir surveys.

DGPS Operational Strategy

Our DGPS surveying methodology centers on achieving absolute spatial precision using a network of high-frequency GNSS receivers. By establishing a fixed base station on a known geodetic control point, we compute and broadcast real-time differential corrections (RTK) to mobile rover units, eliminating satellite-derived errors and atmospheric interference.

This dual-receiver architecture ensures that every captured coordinate—whether for topographic mapping, dam structural monitoring, or highway corridor alignment—maintains centimeter-level accuracy. The seamless integration between field data collectors and advanced post-processing software allows us to deliver high-resolution DEMs, contour maps, and GIS layers that form the foundation of critical engineering and environmental assessments.

Technical Capabilities

Multi-Constellation GNSS Tracking: GPS, GLONASS, Galileo, BeiDou

Multi-Frequency L1/L2/L5 carrier phase measurements

RTCM differential correction messages for real-time precision

UHF radio modem & NTRIP internet streaming for corrections

Centimeter-level positioning accuracy in RTK mode

Continuous data logging for post-processed (PPK) surveys

Rugged IP67 rated equipment for harsh field conditions

Seamless integration with Trimble Access & post-processing software

High-precision contour mapping & reservoir capacity analysis

Accurate structural axis control for dam alignment projects

Field Operations Workflow

Base Setup

Establishment of GNSS base station on a known control point for real-time corrections.

Network Lock

Initializing satellite constellations and establishing UHF/NTRIP communication links.

Data Collection

Capturing high-precision topographic coordinates and elevation data in the field.

Quality Control

Validating coordinates through redundant observations and known control points.

Training & Capacity Building

GNSS Framework

Practical GNSS field training session covering setup, constellation locking, and base configuration.

RTK Surveying

Hands-on RTK surveying workshop focusing on rover operations and real-time stakeouts.

Post-Processing

Advanced software post-processing training (PPK) for baseline adjustment and data validation.

Domain Applications

GIS Mapping – Spatial data integrationTopographic Survey – Terrain & contour mappingHighway Corridor – Road alignment mappingReservoir Survey – Sedimentation monitoringForest Boundary Survey- Protected area mappingSand Mining Survey – Riverbed volume estimationHydrographic Cross-Section MappingDam Alignment – Structural axis controlEarthwork Analysis – Cut-fill volume estimation

Common Questions

What correction techniques are used in DGPS surveying?

What coordinate reference systems are commonly used in DGPS surveys?

How is quality control ensured in DGPS surveys?

What data formats are generated during DGPS surveys?

What is multipath error in GNSS surveying?

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