Synopsis
		sftxspf < in.rsf > out.rsf a= lambda1= lambda2=

Parameters
		ints a= Get filter size from input, a0 is 2M+1, a1 is N in equation 3 [dim]   float lambda1= Regularization in t direction, lambda_t in equations 1 and 5   float lambda2= Regularization in x direction, lambda_x in equations 1 and 5