subr mvget_range_reset2
 ;get the values in the time range boxes
 i1 = rfix(xmtextfieldgetstring ($mvgettext3)
 i2 = rfix(xmtextfieldgetstring ($mvgettext4)
 ;get the deltas
 mvget_deltas, dx, dy, dt
 ;if dt is not 1, may have to adjust i2
 nt = i2 - i1 + 1
 nt = nt/dt
 if nt lt 1 then i2 = i1
 ;for t, we are sub-sampling, so the last one is i1+(nt-1)*dt
 i2 = i1+(nt-1)*dt
 xmtextfieldsetstring, $mvcubetext(2), string(nt)
 nx = rfix(xmtextfieldgetstring ($mvcubetext(0)
 ny = rfix(xmtextfieldgetstring ($mvcubetext(1)
 nt = rfix(xmtextfieldgetstring ($mvcubetext(2)
 ntotal = float(nt)*nx*ny/float(dx*dy)
 sq = string(ntotal*1.E-6)
 xmtextfieldsetstring, $mvgettext5, sq
 endsubr
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