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.Th                                    HELP
.S2 SUMMARY:
.ta 9m 18m 
List syntax for GSAC command

Help [command]

where command is one or more of the following:
.sp
.TS
l l l.
ABS		Get absolute value of trace
AGC		AGC traces
ADD		Add constant to each trace
ADDF		Add Files in memory
BACKGROUND		Set trace background color
BD 	BEGINDEVICES	Begin graphics 
BG	BEGINGRAPHICS	Begin graphics 
BOXCAR		Convolve with unit area boxcar
BP	BANDPASS	Bandpass filter 
BR	BANDREJ	Bandreject filter 
CD		change working directory
CH	CHNHDR	Change header 
COLOR		Control plotting colors
CON	CONVOLVE	Convolve traces
COR	CORRELATE	Correlate traces
CUT		Cut trace as it is read
CUTERR		Control CUT
DEC	DECIMATE	Decimate trace
DIF		Differentiate traces numerically
DIV		Divide each trace by constant
DIVF		Divide Files in memory
ECHO		Echo a line of text to the terminal
ENV	ENVELOPE	Get trace envelope 
EXP		Exponentiate traces
EXP10		Raise traces to power of 10 
FFT	DFT	Take Fourier Transform
FG	FUNCGEN	Generate an impulse function 
FILEID		Controls the plot legend
FILT	FILTER	Apply or remove instrument response 
GRID		Control plot grid for x- and y-axes
H	HELP	Print this help list 
HILBERT		Get Hilbert transform of a trace
HIS	HISTORY	Display readline command history
HOLD		Permit plot overlay in current frame
HP	HIGHPASS	Highpass filter 
INTERP	INTERPOLATE	Resample traces 
INT		Integrate traces
LH	LISTHDR	List header 
LINLIN		lin-lin plot for plot, plotpk
LINLOG		lin-log plot for plot, plotpk
LOG		Take natural logarithm of trace
LOG10		Take base 10 logarithm of trace
LP	LOWPASS	Lowpass filter 
MAP		Produce GMT map
MAP5		Produce GMT map (V5.0 and later)
MARKT	MARKTIMES	Marks velocity times in plot
MT	MOMENTTENSOR	Generate seismogram for moment tensor
MUL		Multiply each trace by constant
MULF		Multiply Files in memory
OUTCSV		Output timeseries as spreadsheet CSV
P1	PLOT1	Plot trace (all part of PLOT) 
P 	PLOT 	Plot trace 
P2 	PLOT2 	Plot trace 
PAUSE		Pause a specified number of seconds
PCTL	 	Control time-domain plots
PSP	PLOTSP	Plot trace spectra 
PSPPK	PLOTSPPK	Interactive spectra pick
PRS	PLOTRECORDSECTION	Plot record section 
PPK	PLOTPK	Interactive trace plot 
QDP		Decimate factor for screen plot
Q	QUIT	Exit GSAC 
R	READ	Read SAC files 
REFR	REFRACTION	Enter Refraction Mode 
REV	REVERSE	Reverse Time Series
RH	READHDR	Read header
RI	RICKER	Convolve with Ricker wavelet
RMEAN		Remove mean
ROT	ROTATE	Rotate horizontal components 
ROT3	ROTATE3	Rotate three components to form R T Z
RTR	RTREND	Remove trend 
SGN		1BIT digitization
SHIFT	 	Shift trace in time
SM	SMOOTH	Apply a smoothing operator
SORT		Sort traces
SQR		Square traces
SQRT		Square root of  traces
STACK		Stack traces
SUB		Subtract constant from each trace
SUBF		Subtract Files in memory
SYNC	SYNCHRONIZE	Synchronize trace timing 
TAPER	 	Apply a symmetric taper to  traces
TITLE		Plot title
TRANS	TRANSFER	Apply or remove instrument response
TRAPEZOID		Convolve with unit area trapezoid
TRIANGLE		Convolve with unit area triangle
VERSION		Print version number
W	WRITE	Read SAC files 
WSP	WRITESPEC	Write spectra
WH	WRITEHDR	Write header
WHITEN		Whiten signal 
XGRID		Control x-axis grid
XLIM		Set time axis limits for trace plot
XLIN		Linear x-axis for plot, plotpk
XLOG		Logarithmic x-axis for plot, plotpk
YGRID		Control y-axis grid
YLIM		Set y\-axis scaling for plot1
YLIN		Linear y-axis for plot, plotpk
YLOG		Logarithmic y-axis for plot, plotpk
.TE
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