APPENDIX I 

 CODING OF THE HEADINGS AND MAGNETIC TAPE FORMATS 



The headings of both printed and magnetic-tape outputs use the 

 coding and format from NODC Publication M-2, August 1964, with a 

 few exceptions. The heading entries which are not self-explanatory 

 are as follows. MSQ is the Marsden Square, water depth is in meters, 

 wave source direction is in tens of degrees, but the direction 00 indi- 

 cates no observation. The significant height is coded by Table 10 

 (Code/2 = height in meters). Wave period is coded by Table II (Code 

 X 2 =period in sec). Wind speed is coded as Beaufort force. Table 17. 

 The barometer is in millibars, less 1000 if more than 3 digits; dry-bulb 

 and wet-bulb temperatures are in degrees C, coded with a minus sign 

 rather than an overpunch. The cloud type is from Table 25 and amount 

 (oktas) from Table 26, with X in the first case and 9 in the second case 

 indicating that clouds cannot be observed because of environmental 

 conditions. The visibility is from Table 27 which is roughly in powers 

 of two with Code 4 = 1-2 km. The ice concentration is in oktas. 



The entry CODE indicates the kind of data taken on the station as 

 follows: 



1. STD in entire water column sampled. 



2. STD in lower part of water column, no data from upper part. 



3. STD and shunted STD used; two lowerings. 



4 . STD and Beckman RS5 . 



5. Beckman RS5 only. 



6. 1971 only, Sta. 92-103, conductivity cell shunt inconveniently 

 low resistance. Sta. 104-163, shunted STD only. 



Codes 7 to C (hexadecimal). Same as above, but without surface 

 bucket observation. Codes 4, 5, 6, A, B, and C were not 

 applicable in 1972. 



The magnetic tape output was written on 9-track tape in 40-digit 

 records blocked to 3200 digits at density 400 bpi. Each set of station 

 data is preceded by heading information occupying two 40-digit records, 

 nearly equivalent to the NODC header card. The water properties are 

 in the order depth, temperature, salinity, sound velocity (meters/sec), 

 and sigma-t in Fortran format 3F6.2, F8.2, F7.3. In 1972 the format is 



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