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Impact of Internal and External Interferences on the Performance of a FMCW Radar

Paprocki P.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2011

Vol. 5, no. 3

325--328

Although FMCW technology has become by now mature, there are still some unsolved prob-lems left. First group of them are noise and distortion from own transmitter or receiver. They are usually caused by DDS (Direct Digital Synthesis) and power converters performance. They appear on radar display as circles or arcs because of their isotropic properties. Second group are interferences from external world like beams of pulsed radars working in the same frequency band, reflections from close buildings and installations or sea clutter. Apart from creating artificial echoes of target they can cause degradation of radar tracking sys-tem. This paper evaluates influence of internal and external sources of interferences on the FMCW radar per-formance. DSP (Digital Signal Processing) algorithms which optimize detection of FMCW radar were pre-sented. Means of suppressing analog interferences by digital techniques were shown as well.

Compensation of Magnetic Compass Deviation at Single Any Course

Lushnikov E. M.

TransNav : International Journal on Marine Navigation and Safety of Sea Transportation

2011

Vol. 5, no. 3

303--307

The new method for compensation of deviation of magnetic compass at one any course is offered. The theoretical substantiation of a method is given, the analysis of accuracy is made, corresponding conclusions and recommendations are made. It allows to carry out a deviation’s works without interruption from voyage.

Możliwości rozwoju mostka zintegrowanego na przykładzie statku "Horyzont II"

Brzóska S.

Zeszyty Naukowe Akademii Morskiej w Gdyni

2010

nr 67

26-29

W artykule zawarto analizę konieczności zamontowania systemu mostka zintegrowanego na statku badawczym "Horyzont II" oraz możliwości połączenia jego interfejsu z nowozainstalowanym sonarem patrzącym wprzód. Scharakteryzowano nowoczesne wyposażenie nawigacyjne statku i wpływ jego wykorzystania na wzrost bezpieczeństwa nawigacji. Naświetlono dalsze możliwości rozwoju systemu mostka zintegrowanego na statkach specjalistycznych.

The article's main subject is necessity of implementing Integrated Bridge System onboard research vessel "Horyzont II" and further connection of that system with newly implemented Forward-looking Sonar. Furthermore article contains characteristic of ship's navigational equipment and ability of using it to support the safety of ship's navigation. Article concludes with future possibilities of development of Integrated Bridge System onboard special-purpose vessels.