Creation of geodetic satellite network

Methods and technologies of geodetic satellite survey based on GNSS methods are widely used for creation of reference geodetic networks, field aerial survey control point referencing , on-board positioning of aerial imagery photos  perspective centres, field topographic survey, land management and cadastre works, monitoring of critical objects.

In the modern world geodetic base network is usually created with the use of global navigation satellite systems (GNSS) GLONASS/GPS principally basically  by application of a differential method. The differential method is most efficient where there is a network of reference (base) stations with specified geodetic coordinates. Application of the differential method provides for spatial objects’ coordinate setting of +/-2 cm accuracy in real time and +/-5 cm in post-processing.

Reference station

Plan of reference stations’ allocation

Satellite geodetic network consisting of reference stations can be used for solution of the following tasks: geodesy, cartography, cadastre; planning, construction, exploitation of automobile and railroads; navigation and security control of automobile, railway, air, river and marine transport; planning, construction and exploitation of buildings and engineering constructions, complex engineering objects: bridges, tunnels, oil and gas pipelines, etc.; real-time monitoring of critical objects.

GNSS technology for monitoring of critical objects

The GLONASS/GPS technology is successfully applied for monitoring of critical objects.

Purpose of the monitoring: safety and reliability control of an object’s operation.
Specific feature of the technology: monitoring is always performed in real time, which provides for operative diagnosis of work of all critical object’s systems.

Monitoring system scheme illustrated by a hydropower station:

1. Referential stations 2. Monitoring stations 3. Tachymeter Total station (for coordinates setting) 4. Communication networks (internet, radio, GSM, fiber optic, WiFi) 5. Control centre (remote) with a bundled software complex