Program sfescdiff | Compute distance and traveltime difference between two escape tables. 
[SYNOPSIS]
sfescdiff < esct0.rsf > out.rsf esct=esct1.rsf maxd=SF_HUGE maxt=SF_HUGE mask=SF_HUGE
[PARAMETERS]
string  | esct | = |   | 	Second set of escape tables (auxiliary input file name)
float   | mask | =SF_HUGE |   | 	Mask for values above maxd= and maxt= thresholds 
float   | maxd | =SF_HUGE |   | 	Maximum allowed distance 
float   | maxt | =SF_HUGE |   | 	Maximum allowed time 
[DIRECTORY]
user/cram
