'SONAR IN REFRACTIVE WATER' PROGRAM. THEORY. FLOW CHARTS. ANU LISTING 

 GIVEN IN REPORT AP-PROG-C-7035 (APR 1967, 80 P), BY HERBERT S. KAPLAN. 



NAVAL UNDERSEA RESEARCH AND DEVELOPMENT CENTER 

 PASADENA LABORATORY 

 ATTN. PHILIP M4RSH 

 3202 E. FOOTHILL BLVD. 

 PASADENA. CALIF. 91107 



HORIZONTAL GRADIENT RAY TRACING LANGUAGE - FORTRAN-63 



computer - cdc 3800 



describes acoustic paths of up to 1000 rays as they progress through 

 the ocean from a point source at arbitrary range and depth. all rays 

 are traced simultaneously in one pass through the velocity field. as 

 the rays are traced several types of intensity calculations are per- 

 formed and a multiplot of rays constructed. basic input consists of a 

 magnetic tape generated by the 'general velocity field' program. out- 

 put — ranges. depths, travel time. sine of angle, number of turning 

 points, number of surface and bottom hits. and signal strength of each 

 ray at ranges specified by the user. also. type i. ii. ill intensi- 

 ties, transmission loss and transmission anomaly. basic ideas con- 

 tained in hudson lab technical report no. 150 (1968). program docu- 

 mentation forthcoming. 



j. j. cornyn, code 8140 

 acoustics division 

 naval research laboratory 

 washington, d. c. 20390 



ray tracing language - fortran iv 



computer - cdc 3800 



calculates ray theory, arrivals and intensities at a large number of 

 receivers. input— velocity profile either as v vs. z or t,s vs. z. 

 Also source and receiver depths, initial ray angles and receiver ran- 

 ges, BEAM patterns (IF ANY). BOTTOM LOSS TABlE. SURFACE LOSS. FREQUEN- 

 CY. OUTPUT — LISTINGS AND PLOTS. EITHER COHERENT OR RANDOM PHASE 

 ARRIVAL SUMS ARE AVAILABLE. 



EDWARD L. WRIGHT. CODE 8172 

 ACOUSTICS DIVISION 

 NAVAL RESEARCH LABORATORY 

 WASHINGTON, D. C. 20390 



ACOUSTIC RAY TRACING LANGUAGE - FORTRAN-63 



COMPUTER - CDC 3800 



CALCULATES PATHS OF ACOUSTIC RAYS FROM A POINT SOURCE IN THE OCEAN, 

 THROUGH A SERIES OF SOUND SPEED PROFILES, ALONG WITH THEIR TrAvEL 

 TIMES AND TRANSMISSION LOSSES. REFLECTIONS OF THE RAYS FROM A LINEAR 

 SEGMENTED BOTTOM ARE CALCULATED. COMPUTES CLOSED FORM PATH ELEMENTS 

 BETWEEN LAYER BOUNDARIES IN THE PROFILE. RAYS ARE TRACED SEQUENTIAL- 

 LY. PROGRAM WILL BE DOCUMENTED IN A FORTHCOMING REPORT. 



E. B. WRIGHT 



CODE 8177. ACOUSTICS DIVISION 

 NAVAL RESEARCH LABORATORY 

 WASHINGTON. 0. C. 20390 



RAY TRACE PROCESSING LANGUAGE - FORTraN-63 



COMPUTER - CDC 3800 



USES OUTPUT OF RAY TRACING PROGRAM TO CALCULATE TRANSMISSION LOSS BY A 

 CHOICE OF THREE METHODS. LOSS AT RECEIVERS IS COMPUTED BY — A) PHASE- 

 DEPENDENT RAY SUM. B) RANDOM-PHASE RAY SUM, C) STATISTICAL DISTRIBU- 



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