;+
;FUNCTION: trange_str,t1,t2
;INPUT: t1,t2 doubles, seconds since 1970
;OUTPUT: string with the format: 'YYYY-MM-DD/HH:MM:SS - HH:MM:SS'
;
;CREATED BY: Davin Larson
;LAST MODIFICATION: @(#)trange_str.pro 1.10 97/12/22
;-
function trange_str, t1,t2,msec=msec,prec=prec
if n_params() eq 1 then return,trange_str(min(t1),max(t1),msec=msec,prec=prec)
prec=0
if keyword_set(msec) then prec=3
s1 = time_string(t1,prec=prec)
s2 = time_string(t2,prec=prec)
if strmid(s1,0, 10) ne strmid(s2,0,10) then begin ;more than one day
return, strmid(s1,0,10)+' - '+strmid(s2,0,10)
endif else return, s1+' - '+strmid(s2,strpos(s2,'/')+1,30)
end