Synopsis
		sfcsp2d < in.rsf > out.rsf ompchunk=1 ompnth=0 adj=y weight=n linear=n v=2000. half=n verb=n nhe=nh dhe=dh he0=h0 nxs=nxm dxs=dxm xs0=xm0 nh=nhe dh=dhe h0=he0 nxm=nxs dxm=dxs xm0=xs0 apt=SF_MAX(fabsf(he0),fabsf(he0+(nhe-1)*dhe))

The axes in the data space are {time,offset,cmp}
The axes in the image space are {time,equiv_offset,csp}

Parameters
		bool adj=y [y/n] yes: CSP mapping, no: CMP building   float apt=SF_MAX(fabsf(he0),fabsf(he0+(nhe-1)*dhe)) aperture   float dh=dhe   float dhe=dh   float dxm=dxs   float dxs=dxm   float h0=he0   bool half=n [y/n] half offset flag   float he0=h0   bool linear=n [y/n] yes: linear interpolation, no: nearest-neighbor interpolation   int nh=nhe   int nhe=nh   int nxm=nxs   int nxs=nxm   int ompchunk=1 OpenMP data chunk size   int ompnth=0 OpenMP available threads   float v=2000. velocity   bool verb=n [y/n] verbosity flag   bool weight=n [y/n] weighting flag   float xm0=xs0   float xs0=xm0