Synopsis
		sfpow < in.rsf > out.rsf tpow= pow#=(0,0,...)

March 2013 program of the month:
http://www.ahay.org/blog/2013/03/10/program-of-the-month-sfpow/

Parameters
		float pow#=(0,0,...) power on #-th axis   float tpow=

Used In
		BEI          dpmv/matt dwnc/vofz fld/yc ft1/brad krch/sep73 sg/denmark vela/stretch wvs/head   DATA          alaska/line31-81-m8r bpmodel94/firstlook