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Input Files for OASM


 
Table 13: OASM input file structure. Terms in bracket in Block V are for plane wave beamforming (option W).
Input parameter Description Units Limits
Block I: TITLE
TITLE Title of run - 80 ch.
Block II: OPTIONS
A B C Output and computational options - 40 ch.
Block III: FREQUENCIES
FREQ1, FREQ2, NFREQ, COFF FREQ1: Minimum frequency Hz >0
  FREQ2: Maximum frequency Hz >0
  NFREQ: Number of frequencies   >0
  COFF: Integration contour offset dB/
Block IV: RECEIVER ARRAY
NRCV NRCV: Number of receivers in array - >0
Z,X,Y,ITYP,GAIN Z: Receiver depth m  
. X: x-offset of receiver m  
. Y: y-offset of receiver m  
. ITYP: Receiver type - >0
  GAIN: Receiver signal gain dB  
Block V: REPLICA SPACE
ZMINR,ZMAXR,NZR Depth (grazing angle) interval m () (-90-90)
XMINR,XMAXR,NXR x (bearing) interval km () (-360-360)
YMINR,YMAXR,NYR y (dummy) km  
Block VI: REFERENCE SOUND SPEED (Option W)
CBEAM Reference speed for plane wave replicas m/s  
Block VII: TOLERANT BEAMFORMER (Option T)
CLRMIN,CLRMAX,NCLR Coherence lengths for replicas m  
TOLR Tolerance    
Block VII: SIGNAL BLURRING (Option K)
CLS Coherence length for signals m  

The input file for OASM is structured in 7 blocks, the first 5 of which, shown in Table 13 contain data which must always be given, such as the frequency selection, receiver array and replica sampling. The last 3 blocks should only be included for certain options as indicated. The various blocks and the significance of the data is described in the following.



 
next up previous contents
Next: Block I: Title of Up: OASM: Matched Field Processing Previous: OASM: Matched Field Processing
henrik schmidt
1999-08-25