Corrections to
	A Lab Manual of Seismic Processing
	Roger A. Young
	2004 EAGE Publications
	ISBN 90-73781-34-5
	August 2006
The Lab Manual uses the Seismic Processing Workshop (SPW) software package to process a near-surface 2-D, reflection dataset from Canada.	The Lab Manual comprises material from 12 lab sessions intended to be a self-contained package suitable for individual or group use.  The accompanying CD-ROM contains 1) the seismic file for the Casselman survey in SEG-Y format. 2) all SPW files generated by processing in each lab 3) the SPW executable code (v.2.0.3) which will execute the Casselman dataset only 4) all PGC documentation normally bundled with the SPW executable code.	The Lab Manual was written in 2004 using SPW version 1.8.19 and version 2.0.3. Later versions of SPW will show some differences in the format of interactive spreadsheets. These differences are generally minor and their impact on the SPW Lab Manual processing flows is small. To download the latest version of SPW see the Parallel Geophysics Corporation website (www.parallelgeo.com).
Page, paragraph in Manual	Erroneous statement	Correction
p.12, para 3	“Extensive html links permit rapid movement between text and figures and between a list of figures and the figures themselves"	Disregard sentence:   there can be no such links in a hardcopy book.
p. 17, para 4	"To install the software from the CD-ROM, follow instructions given in the file SPWInstallReadMe.txt"	"To install the software from the CD-ROM, follow instructions given in the file SPW Lab Manual README.txt"
p. 18, para 3	“Locate the folder SPW files\SPWLa&\)on the CD-ROM accompanying this manual."	“Locate the folder Lab Manual.ZIP on the CD-ROM accompanying this manual."  Then unzip entire contents of folder using folder names.
p. 18,  para 3	"Copy files cas.segy, sx3.tfm, casobs, casrec, cassrc to your user area."	Copy files cas.spw, sx3.tfm, casobs, casrec, cassrc to your user area.
p. 20, para 3	"Click Editing Steps/Geometry Definition and drag and drop the icon on the flow sheet."	"Click Geometry/Binning/Geometry Definition and drag and drop the icon on the flow sheet."
p. 30,  para 0	"Choose Step Animate Forward".	"Choose Step/Animate/Forward."
p.36, para 0	"semblance length     1.     ms"	"semblance length     1.     [ms]"
p. 36	Wrong Figure 4	Figure 4
p. 36, para 1	"Choose   16    taper length     samples"	"Choose   20   taper length    samples"
p. 43, para 4	"Store the output seismic file—the semblance maps of source gathers—and store in the seismic file cas_semb_sour.spw."	"Store the output seismic file—the semblance maps of source gathers—in the seismic file cas_semb_sour.spw."
p. 45, para 3	"Only one stacking velocity would have been used at this To, so it would have been possible impossible to image both events optimally on the stacked section."	"Only one stacking velocity would have been used at this To, so it would have been impossible to image both events optimally on the stacked section."
p. 55, para 4	"percentage"	"percentage  (delta f / f )"
p. 55, para 4	" taper length             15    samples"	" taper length             20    samples"
p. 56, para 1	"Save the flow cas_stack_flo, compile it, and execute it."	"Save the flow cas_stack.flo, compile it, and execute it."
p. 69, Figure 14	Icon caption reads "cas_decontest.spw."	Icon caption should read "cas_decontest1.spw."
p. 70, para 0; p. 74 para 2; p. 76, para 1	“Do not click          Range limit trace “	Disregard instruction: there is no such choice.
p. 70, Figure 15	Figure 15 is blurry.	Figure 15
p. 84, para 5	"percentage"                     130	"percentage  (delta f / f )"                    130
p.86, Figure 26 icon	"reciever statics" card deck	"receiver statics" card deck
p. 94, Figure 31	There is an apparent mismatch between trace locations for the top and bottom stacked sections.	Top section displays CMP location numbers.                                     Bottom section displays shot location numbers.
p. 116, Figure 36 caption	"Rays reflecting at the same point for all possible shot/receiver pairs (red) define a common midpoint (CMP) gather."	"Rays reflecting at the same point (column of red dots) for all possible shot/receiver pairs define a common midpoint (CMP) gather."
p. 105, Figure 35	Figure 35 is blurry.	Figure 35
p. 117, Figure 37	Figure 37 is blurry.	Figure 37
	The author is grateful for the assistance of Nicholas Ebner and Matt Ralston for their assistance in identifying parts needing correction.
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