METOC 50-1T-9604, TROPICAL SYNOPTIC MODELS

METOC 50-1T-9607, TROPICAL STREAMLINE ANALYSIS

METOC 50-1T-9611, A WORKBOOK ON TROPICAL CLOUDS AND CLOUD SYSTEMS OBSERVED IN SATELLITE IMAGERY, VOL II

METOC 62T-0602, ACOUSTICS AND SOUND RAY THEORY

NAVEDTRA 10370, AEROGRAPHER`S MATE, 2ND CLASS, VOL 1

Reference

NAVEDTRA 10371, AEROGRAPHER`S MATE SECOND CLASS, VOL 2

Reference

NAVEDTRA 14010, AEROGRAPHER`S MATE 1 & C

Reference

NAVEDTRA 14270, AEROGRAPHER`S MATE, MODULE 02--MISCELLANEOUS OBSERVATIONS AND CODES

Reference

NAVEDTRA 14271, AEROGRAPHER`S MATE, MODULE 03--ENVIRONMENTAL SATELLITES AND WEATHER RADAR

Reference

NAVEDTRA 14272, AEROGRAPHER`S MATE, MODULE 04--ENVIRONMENTAL COMMUNICATIONS AND ADMINISTRATION

Reference

NAVEDTRA 14312, AEROGRAPHER`S MATE, MODULE 05--BASIC METEOROLOGY

Reference

NAVMETOCCOMINST 3100.2, SPECIAL INCIDENT REPORTING (OPREP-3 AND UNIT SITREP) PROCEDURES

NAVMETOCCOMINST 3140.1, UNITED STATES NAVY METEOROLOGICAL & OCEANOGRAPHIC SUPPORT SYSTEM MANUAL

NAVMETOCCOMINST 3140.14, PROCEDURES GOVERNING FLIGHT WEATHER BRIEFINGS AND PREPARING DD FORM 175-1 AND U.S. NAVY FLIGHT FORECAST FOLDER

Reference

NAVMETOCCOMINST 3140.7, FLEET LIAISON PROGRAM

NAVMETOCCOMINST 3143.1, AERODROME FORECAST (TAF) CODE

Reference

Fleet Oceanographic And Acoustic Reference Manual Pdf

NAVMETOCCOMINST 3144.1, UNITED STATES NAVY MANUAL FOR SHIP`S SURFACE WEATHER OBSERVATIONS

Reference

NTP-3, NAVAL TELECOMMUNICATIONS PROCEDURES TELECOMMUNICATIONS USER`S MANUAL

OPNAVINST 3140.24, WARNINGS AND CONDITIONS OF READINESS CONCERNING HAZARDOUS OR DESTRUCTIVE WEATHER PHENOMENA

Reference

OPNAVINST 3710.7, NATOPS GENERAL FLIGHT AND OPERATING INSTRUCTIONS

Fleet Oceanographic And Acoustic Reference Manual Pdf

Rp 33 Fleet Oceanographic Pdf

Chilton mazda 3 2016 automotive repair manuals. Reference

OPORD 2000 ANNEX H, CINCLANTFLT/CINCPACFLT OPORD 2000 ANNEX H

RP 33, FLEET OCEANOGRAPHIC AND ACOUSTIC REFERENCE MANUAL

SECNAV M-5510.30, DEPARTMENT OF THE NAVY PERSONNEL SECURITY PROGRAM

Reference Practice Quiz

[ Back ][ Home ][ Up ][ Next ]

Click here to Order your Radar Equipment Online

Passive Sonar Equation
In passive-sonar operations, the hydrophorespickup sounds generated by a multitude of soundsources.Sonarmen must differentiate betweensoundsgenerated by a target and interferingbackgroundnoise. This process is best describedinwhat is known as the passive sonar equation.Thepassive form of the sonar equation, like theactiveform, is written using several differentsymbolsto represent the equation parameters.Oneform of the equation is as follows:
SIGNAL EXCESS. —Signal excess has thesamemeaning in the passive equation that it doesinthe active equation.
SOURCE LEVEL. —Source level pertains totarget-radiatednoise. It is the amount of soundenergygenerated by a target. The level of energyreachingthe sonar receiver depends on the typeoftarget and its mode of operation. Source levelisa function of frequency, speed, depth, andtargetaspect. The latter refers to a target’sorientationin relation to the sonar receiver.
RECOGNITION DIFFERENTIAL. —RDhasthe same meaning as in the active sonarequation.
NOISE LEVEL. —The definition for NL inthepassive equation is the same as in the activeequation.Passive sonars may be ambient-noiseorself-noise limited. These sonars lessen the noiseincertain frequency ranges, thereby permittingatarget signal to be more readily detected.
Ambient Noise. —Ambient noise is thatpartof the total background noise created bysurface-shiptraffic, wave action, precipitation,ice,and certain forms of marine life.
Fleet oceanographic and acoustic reference manual pdf
Self Noise. —Self noise is that part of the totalbackgroundnoise attributable to the sonar equip-ment,theplatform on which it is mounted, or thenoisecaused by the motion of the platform. Themajorclasses of self-noise are machinery noise,propellernoise, and hydrodynamic noise. Thelatterresults from the flow of water pasthydrophores,supports, and the hull structure oftheplatform.
DIRECTIVITY INDEX. —DI has the samemeaningas in the active sonar equation.
PROPAGATION LOSS. —PL has thesamemeaning as in the active sonar equationexceptthat with passive sonar, the energy loss isone-way.
References
Fleet Oceanographic and Acoustic ReferenceManual, RP-33, Naval Oceanographic Office,July1986.
Operational Oceanography Module II, AcousticsandSound Ray Theory, NOCF Bay St. Louis,Miss.,1988.

Fleet Oceanographic Reference Manual Pdf

[ Back ][ Home ][ Up ][ Next ]