TIKES FROM THREE BEACONS. LIMIT, ^0 FIXES PER TRACK. CORE STORAGE 

 NEEDED — ABOUT 14K WORDS. AUTHOR — S. KOCHANSKI. NSSNF. (PROGRAM 

 DOCUMENTATION UNCLASSIFIED BUT DISTRIBUTION CONTROLLED BY NSSNF) 



COMMANDING OFFICER 



NAVAL STRATEGIC SYSTEMS NAVIGATION FACILITY 



FLUSHING AND WASHINGTON AVENUES 



BROOKLYN. NEW YORK 11251 



SPANSlB LANGUAGE - FORTRAN 



COMPUTER - CDC 3200 

 (COPY ON FILE AT NODC) 



TRANSLATES AND ROTATES A SET OF BEACON COORDINATES FROM LOCAL COORDIN- 

 ATES TO GEODETIC COORDINATES. INPUT TO PROGRAM — SHIPS POSITIONS FROM 

 EXTERNAL FIXES AND CORRESPONDING POSITIONS FROM 'BECNAV PROGRAM, AND 

 BEACON POSITIONS IN LOCAL COORDINATES FROM 'SPANSIA'. AUTHOR-- S. KO- 

 CHANSKI, NSSNF. (PROGRAM DOCUMENTATION UNCLASSIFIED BUT DISTRIBUTION 

 CONTROLLED BY NSSNF) 



COMMANDING OFFICER 



NAVAL STRATEGIC SYSTEMS NAVIGATION FACILITY 



FLUSHING AND WASHINGTON AVENUES 



BROOKLYN, NEW YORK 11251 



GREAT CIRCLE DISTANCE BETWEEN TWO POINTS LANGUAGE - FORTRAN 



COMPUTER - CDC 3800 



DETERMINES THE DISTANCE IN NAUTICAL MILES ALONG THE GREAT CIRClE PATH 



between two points on the earth, and the initial and final bearings of 

 that path. the earth is assumed spherical with one nautical mile per 

 minute of arc. documentation available — nrl computer note 32. 



david chang, code 8170 



acoustics division 



naval research laboratory, washington, d. c. 20390 



great circle paths from a point language - fortran 



computer - cdc 3800 



from a great circle path specified by an initial point and bearing, 

 the program gives the locations and bearings of points at a given ar- 

 ray of distances in nautical miles along that path. documentation — 

 nrl computer note 33. 



david chang, code 8170 



acoustics division 



naval research laboratory, washington, d. c. 20390 



astronomic position, azimuth method language - fortran iv-h 



computer - ibm 360/65 

 (copy on file at nodc) 

 calculates the latitude and longitude of an astronomic observation 

 station, given measured horizontal angles between stars and fixed mark 

 Along with the observation times, a set of observation equations is 

 SOLVED By the method of least squares to obtain corrections to assumed 

 values of latitude, longitude, and the azimuth of the reference mark 

 as well as probable errors for these three quantities, the adjustment 



IS iterated five times or until the corrections become less than 0.005 

 SECONDS, EITHER OF WHICH CAUSES A PROGRAM HALT. OUTPUT — A TABlE OF 

 INPUT INFORMATION AND A RECORD OF THE PROCESS OF REFINEMENT FUR EACH 

 SET OF STATION DATA READ IN. STORAGE NEEDED — APPROX. 37,500 BYTES 

 FOR THE PROGRAM PLUS ITS SUBROUTINES. AUTHOR — SPENCER ROEDDER. A 

 PREVIOUS VERSION OF THIS PROGRAM WAS WRITTEN IN ALGOL FOR THE BUR- 

 ROUGHS 220, IN SINGLE PRECISION. 



U.S. GEOLOGICAL SURVEY 



PAGE 059 



