;+ ;FUNCTION: vperp_3d_new(dat,ENERGY=en,ERANGE=er,EBINS=ebins,ANGLE=an,ARANGE=ar,BINS=bins) ;INPUT: ; dat: structure, 3d data structure ;KEYWORDS ; ENERGY: fltarr(2), optional, min,max energy range for integration ; ERANGE: fltarr(2), optional, min,max energy bin numbers for integration ; EBINS: bytarr(na), optional, energy bins array for integration ; 0,1=exclude,include, ; na = dat.nenergy ; ANGLE: fltarr(2,2), optional, angle range for integration ; theta min,max (0,0),(1,0) -90<theta<90 ; phi min,max (0,1),(1,1) 0<phi<360 ; ARANGE: fltarr(2), optional, min,max angle bin numbers for integration ; BINS: bytarr(nb), optional, angle bins array for integration ; 0,1=exclude,include, ; nb = dat.ntheta ; BINS: bytarr(na,nb), optional, energy/angle bins array for integration ; 0,1=exclude,include ;PURPOSE: ; Returns Vperp, km/s, corrects for spacecraft potential if dat.sc_pot exists ;NOTES: ; Function normally called by "get_3dt" or "get_2dt" to ; generate time series data for "tplot.pro". ; ;CREATED BY: ; J.McFadden 07-6-05 ;LAST MODIFICATION: ;- function vperp_3d_new,dat2,ENERGY=en,ERANGE=er,EBINS=ebins,ANGLE=an,ARANGE=ar,BINS=bins,_extra=_extra vperp = 0. if dat2.valid eq 0 then begin dprint, 'Invalid Data' return, vperp endif vel = v_3d_new(dat2,ENERGY=en,ERANGE=er,EBINS=ebins,ANGLE=an,ARANGE=ar,BINS=bins,_extra=_extra) vperp = -crossp2(crossp2(vel,dat2.magf),dat2.magf)/total(dat2.magf*dat2.magf) ; units are mV/m return, vperp end