Test data shot on 30July2000  CALIBRATION
Location: Idaho, before leaving for Denver
blow 1 to south
blow 2 to north

 1-->   |----source--------|  <--2
                  R
                 /|\ 
             T <--O    ref phone 50 inches from source
                       (Ch 4,5,6 = V, R, T)

                  R
                 /|\
                  0-->T     Borehole phone, 0.1 m depth 2"pvc
                bowspring  (away from source) (Ch 1,2,3 = V, R, T)

                borehole phone 292 inches from source

             East
             /|\ 
  North <-----|
