UDC 621.396
DETERMINATION OF SLANT RANGE BETWEEN A SHIP AND A BOTTOM STATION
B. I. Filippov, Ph.D (technical sciences), associate professor, NSTU, IPD; This email address is being protected from spambots. You need JavaScript enabled to view it.
In the article determination of distance between the vessel and ground stations which is based on active methods measurement of time to distribute probing hydroacoustic signals from the vessel to the hydroacoustic ground autonomous station (HGAS) on inquiry - response system is considered. It is shown that for all practically important cases when the ratio of signal power to the noise exceeds 12 dB, the definition of slant range which is caused by the moment of error detection of measurement signals on bottom station and on the ship at speeds of 200 and 400 baud is equivalent to an error in determining the slant range equal to 32 and 16 cm, respectively.Therefore, the error of slant range definition depends only on the error in the determination of sound speed. Assuming that ships allows to define average speed of sound with an accuracy of 10-3, the error in determining slant range will be approximately estimated by the value of 25m and the upper boundary estimate will be about 43m.
Keywords: hydroacoustic channel, a ship, bottom station, inclined range, hydroacoustic beacon, autonomous ground station.