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Currently, there are several global navigation satellite systems ( GNSS ). The data of the technology allow solving various tasks of positioning accurately, reliably and quickly.

The use of GNSS-technology at the domestic level is limited to using the navigator in the phone or car for routing, own positioning or searching for nearby objects. Using a conventional navigator, you can get measurements with an accuracy of 5 – 10 meters, which for the needs of high-precision positioning is really not enough – you need the use of special equipment .

Equipment of this class is used for high-precision measurements in geology, geodesy, geophysics, surveying, surveying, cadastral, construction works. Satellite receivers for high-precision work allow you to determine the coordinates in two ways:

1. Absolute;

2. Differential.
With the first method, the accuracy can be several meters. For more accurate measurements, it is necessary to use the second method, which involves several necessary conditions. To carry out the differential determination, two GNSS receivers are needed. One of them is basic – it is fixed stationary at a given point. The second receiver – mobile or “field” – is designed to directly perform the necessary measurements.

You can take measurements in several ways:

1) Statics

2) Kinematics with post-processing

3) Kinematics in real time

The first and second versions provide for the desk processing of accumulated measurements, which is currently used less and less.

The third option allows you to receive data with high accuracy directly in the field in online mode. To realize this technology it is necessary to provide communication between the receivers via GSM / GPRS / Radio channel to receive the differential correction data by the field receiver. For the user, a number of additional tasks arise in the implementation of RTK technology:

– Additional costs – purchase of a basic receiver, an additional modem;

– Provision of communication channels;

– monitoring the safety of the equipment of the base station.

– When different brigades work from different base stations, overlap is possible due to the use of different coordinate systems.

EagleCORS service helps to solve similar problems. Our base stations work around the clock in all regions of Uganda, and their number continues to grow. The antennas are rigidly fixed on the supporting structures of buildings, which ensures the reliability of the position of the antenna phase center. The equipment is under round-the-clock control and data loss is almost impossible.

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