AND THE INDEPENDENT VARIABLES WHICH ARE FUNCTIONS OF TIME ARE EXTRACT- 

 ED FROM THIS TABLE. THE LEAST SQUARES METHOD IS EMPLOYED AND THE HAR- 

 MONIC CONSTANTS ARE DERIVED BY THE USE OF A MULTIPLE CORRELATION 

 SCREENING PROCESS WHICH CAN BE TERMINATED WHEN THE REGRESSION EQUATION 

 CONTAINS A SPECIFIED NUMBER OF TERMS OR WHEN THE NEXT CONSTITUENT WILL 

 NOT EXPLAIN A PREDETERMINED FRACTION OF THE VARIANCE. TIDE HEIGHTS 

 ARE READ INTO CORE STORAGE FROM MAGNETIC TAPE OR CARDS. OTHER INPUT 

 INCLUDES CONSTITUENT SPEEDS IN DEGREES PER SOLAR HOUR. NODE FACTORS. 

 AND EQUILIBRIUM ARGUMENTS IN DEGREES. THE OUTPUT IS AN ORDERED LIST- 

 ING OF HARMONIC CONSTANTS. NO PROVISION IS MADE FOR ELIMINATION OF 

 COMPONENT EFFECTS. CORE STORAGE NECESSARY - 38.000 WORDS. AUTHOR - 

 ROBERT A. CUMMINGS. EARLIER VERSIONS WRITTEN FOR THE IBM 1620-1 AND 

 FOR THE IBM 7030 (STRETCH) COMPUTERS. 



OCEANOGRAPHY DIVISION 



ESSA. COAST AND GEODETIC SURVEY 



ROCKVILlE, MD. 20852 



TIDAL CURRENT PREDICTION LANGUAGE - FORTRAN IV 



COMPUTER - CDC 6600 

 (COPY ON FILF AT NODC) 



COMPUTES HOURLY VELOCITIES OF THE CURRENT, TIMES OF SLACK AND TIMES 

 AND VELOCITIES OF MAXIMUM CURRENT USING THE HARMONIC METHOD IN WHICH 

 THE CONSTITUENT VELOCITIES ARE COMBINED INTO THE RESULTANT VELOCITY. 

 HOURLY VALUES ARE SCREENED TO DETERMINE BETWEEN WHICH HOURS A SLACK 

 OR MAXIMUM OCCURS. THEN CALCULATION AND COMPARISON OF THE VELOCITIES 

 ARE MADE AT 0.1 HOUR INTERVALS UNTIL THE TIME OF SLACK OR EXTREME VEL- 

 OCITY IS DETERMINED. CORE STORAGE NECESSARY — 11.000 WORDS. AUTHOR - 

 ROBERT A. CUMMINGS. 



OCEANOGRAPHY DIVISION 



ESSA, COAST AND GEODETIC SURVEY 



ROCKVILLE, MD. 20852 



NIO PROGRAM 48 - TIDAL ANALYSIS AND PREDICTION LANGUAGE - CHlF 3/4 



COMPUTER - MERCURY 



GENERAL PURPOSE PROGRAM FOR (1) THE ANALYSIS OF A YEAR'S HOURLy OB- 

 SERVED VALUES OF TIDAL HEIGHT INTO 63 TIDAL CONSTITUENTS, (2) THE PRE- 

 DICTION OF VALUES OF TIDAL HEIGHT FOR A SPECIFIED PERIOD AND SPECIFIED 

 INTERVAL BETWEEN PREDICTIONS. (3) THE CALCULATION OF RESIDUAlS (OBSER- 

 VATIONS - PREDICTIONS) FOR A SPECIFIED PERIOD AND INTERVAL. AjTHOR — 

 JAMES CREASE. REF. N.I.O. INTERNAL REPORT NO. N5, PAGES 21-26. jHIS 

 PROGRAM SHOULD BE ADAPTABLE TO THE ATlAs COMPUTER. 



NATIONAL INSTITUTE OF OCEANOGRAPHY 

 WORMLEY, GODALMING, SURREY 

 ENGLAND 



theoretical radial tidal force language - mad 



computer - ibm 7090 

 (copy on file at nodc) 

 there are three input formats to this program — 1) astronomical data 

 from the nautical almanac. 2) the solar ephemeris obtained from the 

 same source. only the earth- sun radius vector is needed. 3) list of 

 local constants, latitude and longitude in degrees of arc and minutes, 

 Elevation in centimeters, output gives lunar, solar, and total tidal 

 forces and the vector date. program accomodates maximum of 725 hours 



(30 DAYS) OF DATA IN CORE STORAGE. AUTHOR — HENRY L. POLLAK. 



DEPT. OF EARTH AND PLANETARY SCIENCES 

 414 SPACE RESEARCH COORDINATION CENTER 

 UNIVERSITY OF PITTSBURGH 

 PITTSBURGH, PENNA 15213 



ASTRONOMICAL TIDE PREDICTION LANGUAGE - FORTRAN 66 



PAGE 104 



