METHOD OF PLOTTING SEA BOTTOM NAVIGATION CHART Russian patent published in 2005 - IPC

FIELD: hydro-acoustics; navigation of sea-going ships; determination of submersible vehicle position.

SUBSTANCE: proposed method includes running around preset area and radiation of acoustic pulse signal towards sea bottom for each point of navigation chart, forming directional pattern of receiving antenna, reception and conversion of acoustic pulse signals reflected from interface into electrical signals which are amplified and separation of the envelope of these signals; the envelope of electric pulse signals from output of receiving channel is transmitted to analog-to-digital converter which takes accesses of the envelope at digitization frequency equal to double bandwidth of receiving channel from moment of radiation of acoustic pulse signal to moment equal to time required for its passage through preset depth and vice versa; accesses taken in this interval are divided into maximum magnitude of access in this interval; magnitudes are placed according to geographic coordinated and are stored in digital form as digital navigation chart of sea bottom.

EFFECT: enhanced efficiency.

3 dwg