This Directory contains the text of PASSCAL DATA REPORT #90-001 which is Part I of the 1988-89 PASSCAL Basin and Range Passive-Source Experiment The text may be printed using: tbl nv8889_laa.txt | eqn | ptroff -ms on Sun Microsystems computers. The Figures are in PostScript and may be printed with: lpr *.ps on Sun Microsystems computers equipped with PostScript printers.