same plots. VPRN functions similarly by sending user-specified plots to a 

 printer. 



Input Files: CHANNEL.DAT; PARAM.DAT; VOBSD.DAT (measured velocities) 

 HPAS and HPRN 



129. The program HPAS plots water surface elevations as a function of 

 time at nodes specified in file PARAM.DAT against measured values on the 

 screen. If a file named FTIDE.DAT containing measured values of water surface 

 elevation is available , the program graphs the measured values on the same 

 plot. HPRN functions similarly by sending user-specified plots to a printer. 



Input Files: TIDE. DAT; PARAM.DAT; FTIDE.DAT (measured tidal elevation) 



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