f = Coriolis parameter 



R = Radius of earth 



djA = Dynamic depth anomaly field at depth D 



= Longitude 



= Latitude 



The printout consists of the standard depth of the data and the center and ranges for the 

 latitude, longitude, and Julian day. At the end of the data list (appears if data print option was 

 selected), the latitude, longitude, and Julian day at which the plane fit was evaluated along with 

 the components of geostrophic velocity in knots and the number of points which were used in 

 the fit are printed. 



Vm. File Description: 



a. Disk File 



1. Physical Characteristics 



(a) Indexed sequential organization 



(b) Sequential access mode 



(c) One cylinder used for cylinder index 



(d) RECFM = FB (fixed longth blocks) 



(e) LRECL = 18 bytes (logical record length) 



(f) KEYLENGTH = 15 bytes 



(g) BLKSIZE = 6372 bytes 



(h) Blocking factor 354 records/block 

 (i) AH fields in packed decimal form. 



2. Usage 



The dynamic-height-file (ISAMFILE) contains the dynamic depth anomaly data 

 for DYFIT. It is created by the CREATE program - refer to it for sort order. In DYFIT, a call 

 to SETKEY opens the file and positions it at the first record matching the starting - standard - 

 depth (DPDP) and the first - Julian - day (TMIN) parameters. If there is no data in the file at 

 this position, SETKEY returns a 1 in key - error (KEYERR). READER is then called to read 

 records sequentially from that point on until a record is read whose Julian day is greater than 

 last - Julian - day (TMAX), whose standard - depth is greater than starting - STD - depth (DPDP), 

 or the end of file is found. The file is then closed and reader returns a 1 in EOF. 



B3 



