Program:  lsd
Purpose:  List a SEG-Y disk file
Usage: lsd [-K] filename [trace-inc ntodo long-list]
-K = List Knudsen's recording parameters from the trace header. (unprocessed sgy files only)
trace-inc = the increment between traces e.g. 2 means ever other trace.
ntodo = the number of traces to list.
long-list = any value indicates that various trace header information is printed.
Example 1:
>lsd Tjornes.35.stackG.746.2205 1 5
      SHOT   TR       RP    TR ID  RANGE DELAY NSAMPS    SI   YR DAY HR MIN SEC
      7267     1     746     1  1    600     0   2500  1000 2001 203 11 43  37
      7267     2     747     1  1    587     0   2500  1000 2001 203 11 43  37
      7267     3     748     1  1    575     0   2500  1000 2001 203 11 43  37
      7267     4     749     1  1    562     0   2500  1000 2001 203 11 43  37
      7267     5     750     1  1    550     0   2500  1000 2001 203 11 43  37



Example 2:
lsd 2009_275_1825_70873_3.5kHz_000.sgy 1 1 1
      SHOT   TR       RP    TR ID  RANGE DELAY NSAMPS    SI   YR DAY HR MIN SEC
       427     1       0     0  1      0    66   1719    38 2009 275 18  25  46
  shot         427  tr           1  src           0  rp           0  tr           0  id      1  eog           0
  fold      1  range           0  relev   0.0000000      selev   0.0000000      sdep   4.0000000      wdep   65.690002    
  time switch or shot time millisecond       2
  source long         -117          17   57.703758    
  source lat.           32          43   51.115608    
  Sweep frequency at start (Hz).   2031
  Sweep frequency at end (Hz).   6031



Example 3:
lsd -K 2009_275_1825_70873_3.5kHz_000.sgy 1 1 1
      SHOT   TR       RP    TR ID  RANGE DELAY NSAMPS    SI   YR DAY HR MIN SEC
       427     1       0     0  1      0    66   1719    38 2009 275 18  25  46
  shot         427  tr           1  src           0  rp           0  tr           0  id      1  eog           0
  fold      1  range           0  relev   0.0000000      selev   0.0000000      sdep   4.0000000      wdep   65.690002    
  time switch or shot time millisecond       2
  source long         -117          17   57.703758    
  source lat.           32          43   51.115608    
  Sweep frequency at start (Hz).   2031
  Sweep frequency at end (Hz).   6031
  Sweep length:      0
  PingStartTimeMS:    765
  TxPower:      1
  RxGain:      0
  ProcessingGain:      0
  Sensitivity:      0
  MuxChannel:      0
  EchoStrength:      0
  PrimaryChannel:      0
  PulseLength:      0
  TxBlank:    150
  SoundSpeed:   1500
  StartDepth:     50
  EndDepth:    100
  EchoThreshold:      0
  Heave:      0
  HeaveLatency:      0
  GpsLatency:      0
  EventMarkCode:      0
  EventMarkNumber:      1
  Scaler: -10000
  DataRate:   25799.795