Data files from 4850 -- trace numbers added

Data file   Data file   Data file Data file
12r.su   75r.su   137r.su 75-162.su
25r.su   87r.su   150r.su 87-112.su
37r.su   100r.su   162r.su 200-mb.su
50r.su   112r.su   175r.su le-fe.su
62r.su records 62r 125r.su   200r.su  

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The following files were acquired on the 300 level

3ll      -- used 100 microseconds sampling interval 3l125  -- used 125 microseconds sampling interval    
3l250 -- used 250 microseconds sampling interval      

 

Railroad track data 12-17-2011 (su format) -- data was acquired with three geophones and source to the north.  channel 1 was horizontal with arrow to the west; channel 2 was vertical; channel 3 was horizontal with arrow to the south.  used geophones from geophone bracket used for 175 receiver for 4850 level data. 100 microsecond sample interval; fallin edge trigger  sgy data