UNCLASSIFIED 



Security Classification 



DOCUMENT CONTROL DATA -R&D 



(Security classification of title, body of abstract and indexing annotation must be entered when the overall report la classified^ 



iRiginating ACTIVITY (Corporate author) 



Coastal Engineering Research Center (CERC) 

 Corps of Engineers, Department of the Army 

 Washington, D. C. 20016 



Za. REPORT SECURITY CLASSIFICATION 



UNCLASSIFIED 



2b. GROUP 



3. REPORT TITLE 



RAPLOT II - COMPUTER PROGRAM FOR DATA PROCESSING AND GRAPHICAL DISPLAY FOR 

 RADIOISOTOPIC SAND TRACER STUDY 



DESCRIPTIVE NOTES (Type of report and inclusive dates) 



kUTHORIS) (Firet 



Philip A Turner 



middle initial, laat 



6. REPORT DATE 



May 1970 



8a. CONTRACT OR GRANT NO. 



b. PROJECT NO. 



7e. TOTAL. NO. CF PAGES 



66 



7b. NO. OF REFS 



10 



9a. ORIGINATOR'S REPORT NUMBER(S) 



Miscellaneous Paper 3-70 



0. DISTRIBUTION STATEMENT 



This document has been approved for public release and sale; its distribution is 

 unlimited. 



SUPPLEMENTARY NOTES 



12. SPONSORING MILITARY ACTIVITY 



3. ABSTRACT 



RAPLOT II is a computer program for processing radiation and navigation data 

 from field surveys of radioisotopic sand tracer (RIST) study, but is applicable to 

 any survey type operation on the nearshore Continental Shelf. Collected data are 

 punched onto paper tape by the data collection computer on the research vessel. The 

 data are later transferred to magnetic tape which provides the input for the RAPLOT II 

 Program. Program control parameters are on punched cards. The navigation data, which 

 consists of ranges to two shore-based radar beacons, are first edited for spurious 

 data, and then converted to rectangular coordinates (in this case the California 

 Lambert Coordinate System) . Radiation data are converted to count rate as counts 

 per second. Background count rate is computed and subtracted from the observed 

 count rate, and any radiation counts that are significantly above the background 

 count rate are corrected for time of decay since the isotope was injected. 



Output from the program is in three forms - printed output, graphical output, 

 and magnetic tape record. The processed data are transferred to magnetic tape and 

 made available for further processing, such as the generation of contour maps. 



DD 



FORM 



t MOV C« 



4 M •*«*) RCPLACBS DO FORM 147*. I 

 | H /J OWOLITI FOR ARMY UB«. 



I JAN •«. WHICH I* 



UNCLASSIFIED 

 Security Classification 



