Measurement of Radio Signals and Interferences Parameters

Application of Radio Signals with Binary Modulation on Subcarriers in Navigation Satellite Systems and the Complex of Glonass Simulation Facilities for the Training of the Officers of Internal Affairs Authorities of the Russian Federation

Vestnik of Volga State University of Technology Ser Radio Engineering and Infocommunication Systems ◽

10.15350/2306-2819.2016.4.6 ◽

2016 ◽

Vol 32 (4) ◽

pp. 6-14

Author(s):

Oksana Bokova ◽

Dmitry Dyachenko ◽

Yakov Mykolnikov ◽

Nikolay Hohlov

Keyword(s):

Russian Federation ◽

Navigation Satellite ◽

Satellite Systems ◽

Binary Modulation ◽

Radio Signals ◽

The Russian Federation ◽

Internal Affairs

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Ultra Short Baseline (USBL) Calibration for Positioning of Underwater Objects

Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics ◽

10.15408/fiziya.v2i2.12524 ◽

2019 ◽

Vol 2 (2) ◽

pp. 73-85

Author(s):

Bagus Septyanto ◽

Dian Nurdiana ◽

Sitti Ahmiatri Saptari

Keyword(s):

Acoustic Wave ◽

Scale Factor ◽

Positioning System ◽

Radio Waves ◽

Short Baseline ◽

Error Angle ◽

Satellite Navigation System ◽

The Earth ◽

Underwater Positioning ◽

Radio Signals

In general, surface positioning using a global satellite navigation system (GNSS). Many satellites transmit radio signals to the surface of the earth and it was detected by receiver sensors into a function of position and time. Radio waves really bad when spreading in water. So, the underwater positioning uses acoustic wave. One type of underwater positioning is USBL. USBL is a positioning system based on measuring the distance and angle. Based on distance and angle, the position of the target in cartesian coordinates can be calculated. In practice, the effect of ship movement is one of the factors that determine the accuracy of the USBL system. Ship movements like a pitch, roll, and orientation that are not defined by the receiver could changes the position of the target in X, Y and Z coordinates. USBL calibration is performed to detect an error angle. USBL calibration is done by two methods. In USBL calibration Single Position obtained orientation correction value is 1.13 ̊ and a scale factor is 0.99025. For USBL Quadrant calibration, pitch correction values is -1.05, Roll -0.02 ̊, Orientation 6.82 ̊ and scale factor 0.9934 are obtained. The quadrant calibration results deccrease the level of error position to 0.276 - 0.289m at a depth of 89m and 0.432m - 0.644m at a depth of 76m

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