;+ ; NAME: ; thm_gmag_stackplot.pro ; ; PURPOSE: ; To create 3 PNG files displaying the H,D and Z components of the magnetic field ; from multiple GBO stations out of GMAG data that is stored in CDF file. ; ; CALLING SEQUENCE: ; thm_gmag_stackplot, date, duration, stack_shift=stack_shift, no_expose=no_expose, make_png=make_png ; ; INPUTS: ; date: The start of the time interval to be plotted. (Format: 'YYYY-MM-DD/hh:mm:ss') ; duration: The length of the interval being plotted. (Floating point number of days -> 12hr=0.5), default=1 ; stack_shift: Space between stations on the y-axis (units are nanotesla), default=50 ; no_expose: Set this keyword to prevent the plot from being printed to the screen. ; make_png: Set this keyword to make the 3 PNG files. ; max_deviation: Large spikes in the data (probably gliches) can screw up the y-axis scales. This keyword allows ; you to set the maximum deviation the data can go from the median; points that exceed this value are omitted. ; The default value is 500 nT. ; no_data_load: This keyword prevents new data from being loaded; the routine will try to plot existing data if it exists. ; hi_lat: Set this keyword to plot high latitude stations (above 49 degrees) ; lo_lat: Set this keyword to plot low latitude stations (below 49 below) ; ; OUTPUTS: ; None, but it creates 3 PNG files in the directory that IDL is being run. ; ; PROCEDURE: ; Read in data from CDF files; plot the data using tplot.pro routines; ; make PNG files with makegif.pro routine ; ; EXAMPLE: ; thm_gmag_stackplot, '2006-11-11',1,/make_png, max_deviation=500, stack_shift=200. ; ; MODIFICATION HISTORY: ; Written by: Matt Davis ; October 23, 2006 Initial version ; ;NOTE: This program is still in development. Features to be added: ; -generalizing the routine ; ;- pro thm_gmag_stackplot, date, duration, stack_shift=stack_shift, no_expose=no_expose, make_png=make_png, max_deviation=max_deviation,no_data_load=no_data_load,hi_lat=hi_lat,lo_lat=lo_lat ;________________________________________________________________________________________________ ;find all gmag CDF files on given date and put data into tplot variables ;________________________________________________________________________________________________ if not keyword_set(date) then begin print, 'You must specify a date. (Format : YYYY-MM-DD/HH:MM:SS)' return endif if not keyword_set(duration) then duration=1. start_time=time_double(date) end_time=start_time+86400.*duration if not keyword_set(no_data_load) then thm_load_gmag, trange = [start_time,end_time],/verbose ;________________________________________________________________________________________________ ;check that there is some valid data ;________________________________________________________________________________________________ tplotvars=tnames('thg_mag_????') if tplotvars(0) eq '' then begin print, 'Appropriate tplot variables could not be found!' print, 'Searched for "thg_mag_????"' print, 'Stackplot program was aborted.' return endif ;________________________________________________________________________________________________ ;this section is in place to make sure that we are only looking at data in the time range specified, ;previously loaded gmag data from different time range is ignored ;________________________________________________________________________________________________ stations=['filler'] for i=0,n_elements(tplotvars)-1 do begin get_data,tplotvars(i),data=dd index_time=where(dd.x ge start_time and dd.x le end_time) if index_time(0) ne -1 then stations=[stations,strmid(tplotvars(i),8,4)] endfor stations=stations(1:*) ;________________________________________________________________________________________________ ;sort stations by longitude ;________________________________________________________________________________________________ lats=fltarr(n_elements(stations)) lons=fltarr(n_elements(stations)) for i=0,n_elements(stations)-1. do begin get_data,'thg_mag_'+stations(i),dlimits=dl lats(i)=float(dl.cdf.vatt.station_latitude) lons(i)=float(dl.cdf.vatt.station_longitude) endfor hi_index=where(lats ge 49) lo_index=where(lats lt 49) hi_stat=stations(hi_index) lo_stat=stations(lo_index) hi_lon=lons(hi_index) lo_lon=lons(lo_index) hi_lat_lon_index=reverse(sort(hi_lon)) lo_lat_lon_index=reverse(sort(lo_lon)) hi_stat=hi_stat(hi_lat_lon_index) lo_stat=lo_stat(lo_lat_lon_index) ;________________________________________________________________________________________________ ;manipulate data into tplot variables for "relative" stack plots ;________________________________________________________________________________________________ if keyword_set(hi_lat) then a=0 else a=1 ; do high lat if keyword_set(lo_lat) then b=1 else b=0 ; do low lat if a gt b then begin ; no keywords then do both a=0 b=1 endif if not keyword_set(stack_shift) then set_default_shift=1 else set_default_shift=0 for w=a,b do begin if w eq 0 then stations=hi_stat else stations=lo_stat ;create tplot variables of components num_elements=n_elements(stations) h_axis_range=dblarr(2) d_axis_range=dblarr(2) z_axis_range=dblarr(2) if set_default_shift eq 1 and w eq 0 then stack_shift=500. if set_default_shift eq 1 and w eq 1 then stack_shift=50. if not keyword_set(max_deviation) then max_deviation=1000. for i=0,num_elements-1 do begin get_data,'thg_mag_'+stations(i),data=dd index_time=where(dd.x ge start_time and dd.x le end_time) themedian=strcompress(string(median(dd.y(index_time,0),/even),format='(f10.1)'),/remove_all) hdata=dd.y(index_time,0)-median(dd.y(index_time,0),/even) indexh=where(abs(hdata) le max_deviation) hdata=hdata(indexh)+stack_shift*i store_data,'thg_mag_'+stations(i)+'_h_rel',data={x:dd.x(index_time(indexh)),y:hdata},$ limits={labels:[strupcase(stations(i))+'='+string(themedian)]} themedian=strcompress(string(median(dd.y(index_time,1),/even),format='(f10.1)'),/remove_all) ddata=dd.y(index_time,1)-median(dd.y(index_time,1),/even) indexd=where(abs(ddata) le max_deviation) ddata=ddata(indexd)+stack_shift*i store_data,'thg_mag_'+stations(i)+'_d_rel',data={x:dd.x(index_time(indexd)),y:ddata},$ limits={labels:[strupcase(stations(i))+'='+string(themedian)]} themedian=strcompress(string(median(dd.y(index_time,2),/even),format='(f10.1)'),/remove_all) zdata=dd.y(index_time,2)-median(dd.y(index_time,2),/even) indexz=where(abs(zdata) le max_deviation) zdata=zdata(indexz)+stack_shift*i store_data,'thg_mag_'+stations(i)+'_z_rel',data={x:dd.x(index_time(indexz)),y:zdata},$ limits={labels:[strupcase(stations(i))+'='+string(themedian)]} if max(hdata) gt h_axis_range(1) then h_axis_range(1)=max(hdata) if max(ddata) gt d_axis_range(1) then d_axis_range(1)=max(ddata) if max(zdata) gt z_axis_range(1) then z_axis_range(1)=max(zdata) if min(hdata) lt h_axis_range(0) then h_axis_range(0)=min(hdata) if min(ddata) lt d_axis_range(0) then d_axis_range(0)=min(ddata) if min(zdata) lt z_axis_range(0) then z_axis_range(0)=min(zdata) endfor ;________________________________________________________________________________________________ ;create buffer tplot variables ;the purpose of these buffers is to 'trick' the plot routines into formatting the stackplots ;the way we want, it can be more reliable (as in doing what we want rather than what we tell it) ;than explicitly setting the plot format ;it also allows for the easy placement of the 'Median (nT)' label ;________________________________________________________________________________________________ bth=dd.y(index_time,0) bbh=dd.y(index_time,0) btd=dd.y(index_time,1) bbd=dd.y(index_time,1) btz=dd.y(index_time,2) bbz=dd.y(index_time,2) bth(*)=h_axis_range(1)+stack_shift bbh(*)=h_axis_range(0)-stack_shift btd(*)=d_axis_range(1)+stack_shift bbd(*)=d_axis_range(0)-stack_shift btz(*)=z_axis_range(1)+stack_shift bbz(*)=z_axis_range(0)-stack_shift store_data,'BUFFER_TOP_H',data={x:dd.x(index_time),y:bth} store_data,'BUFFER_BOT_H',data={x:dd.x(index_time),y:bbh} store_data,'BUFFER_TOP_D',data={x:dd.x(index_time),y:btd} store_data,'BUFFER_BOT_D',data={x:dd.x(index_time),y:bbd} store_data,'BUFFER_TOP_Z',data={x:dd.x(index_time),y:btz} store_data,'BUFFER_BOT_Z',data={x:dd.x(index_time),y:bbz} options,'BUFFER_TOP_H','ytitle','' options,'BUFFER_BOT_H','ytitle','' options,'BUFFER_TOP_D','ytitle','' options,'BUFFER_BOT_D','ytitle','' options,'BUFFER_TOP_Z','ytitle','' options,'BUFFER_BOT_Z','ytitle','' options,'BUFFER_TOP_H','labels',['Median (nT)'] options,'BUFFER_TOP_D','labels',['Median (nT)'] options,'BUFFER_TOP_Z','labels',['Median (nT)'] ;________________________________________________________________________________________________ ;Set various plotting options ;________________________________________________________________________________________________ tplotvars_h=['filler'] tplotvars_d=['filler'] tplotvars_z=['filler'] for i=0,n_elements(stations)-1 do begin tplotvars_h=[tplotvars_h,tnames('thg_mag_'+stations(i)+'_h_rel')] tplotvars_d=[tplotvars_d,tnames('thg_mag_'+stations(i)+'_d_rel')] tplotvars_z=[tplotvars_z,tnames('thg_mag_'+stations(i)+'_z_rel')] endfor store_data,'BH',data=[tplotvars_h(1:*),'BUFFER_TOP_H','BUFFER_BOT_H'] store_data,'BD',data=[tplotvars_d(1:*),'BUFFER_TOP_D','BUFFER_BOT_D'] store_data,'BZ',data=[tplotvars_z(1:*),'BUFFER_TOP_Z','BUFFER_BOT_Z'] options,'BH','ytickformat','(a1)' ; this gets rid of the y-axis numbering options,'BD','ytickformat','(a1)' ; this gets rid of the y-axis numbering options,'BZ','ytickformat','(a1)' ; this gets rid of the y-axis numbering num_hticks=(h_axis_range(1)+stack_shift)/100. - (h_axis_range(0)-stack_shift)/100. h_factor=(byte(num_hticks/30.)+1) num_hticks=byte(num_hticks/h_factor)-1 num_dticks=(d_axis_range(1)+stack_shift)/100. - (d_axis_range(0)-stack_shift)/100. d_factor=(byte(num_dticks/30.)+1) num_dticks=byte(num_dticks/d_factor)-1 num_zticks=(z_axis_range(1)+stack_shift)/100. - (z_axis_range(0)-stack_shift)/100. z_factor=(byte(num_zticks/30.)+1) num_zticks=byte(num_zticks/z_factor)-1 options,'BH','yticks',num_hticks options,'BD','yticks',num_dticks options,'BZ','yticks',num_zticks hy_pos_ticks=findgen(byte( (h_axis_range(1)+stack_shift)/(100.*h_factor) +1.))*100.*h_factor dy_pos_ticks=findgen(byte( (d_axis_range(1)+stack_shift)/(100.*d_factor) +1.))*100.*d_factor zy_pos_ticks=findgen(byte( (z_axis_range(1)+stack_shift)/(100.*z_factor) +1.))*100.*z_factor hy_neg_ticks=-100.*h_factor*reverse(findgen(byte( abs(h_axis_range(0)-stack_shift)/(100.*h_factor) +1.))) dy_neg_ticks=-100.*d_factor*reverse(findgen(byte( abs(d_axis_range(0)-stack_shift)/(100.*d_factor) +1.))) zy_neg_ticks=-100.*z_factor*reverse(findgen(byte( abs(z_axis_range(0)-stack_shift)/(100.*z_factor) +1.))) if n_elements(hy_pos_ticks) gt 1 then hy_tickvalues=[hy_neg_ticks,hy_pos_ticks(1:*)] else hy_tickvalues=[hy_neg_ticks] if n_elements(dy_pos_ticks) gt 1 then dy_tickvalues=[dy_neg_ticks,dy_pos_ticks(1:*)] else dy_tickvalues=[dy_neg_ticks] if n_elements(zy_pos_ticks) gt 1 then zy_tickvalues=[zy_neg_ticks,zy_pos_ticks(1:*)] else zy_tickvalues=[zy_neg_ticks] options,'BH','ytickv',hy_tickvalues options,'BD','ytickv',dy_tickvalues options,'BZ','ytickv',zy_tickvalues options,'BH','yminor',10 options,'BD','yminor',10 options,'BZ','yminor',10 options,'BH','ytitle','Scale='+strcompress(string(100*h_factor,format='(f10.0)'))+'nT/major, '+strcompress(string(10*h_factor,format='(f10.0)'))+'nT/minor tickmark' options,'BD','ytitle','Scale='+strcompress(string(100*d_factor,format='(f10.0)'))+'nT/major, '+strcompress(string(10*d_factor,format='(f10.0)'))+'nT/minor tickmark' options,'BZ','ytitle','Scale='+strcompress(string(100*z_factor,format='(f10.0)'))+'nT/major, '+strcompress(string(10*z_factor,format='(f10.0)'))+'nT/minor tickmark' ;________________________________________________________________________________________________ ;make plots/PNG files ;________________________________________________________________________________________________ If keyword_set(make_png) Then Begin set_plot,'z' device, set_resolution = [800, 800] Endif Else Begin set_plot,'x' if keyword_set(no_expose) then window,0,xsize=800,ysize=800, /pixmap else window,0,xsize=800,ysize=800 Endelse tplot_options,'region',[0.00,0.00,0.95,1.] !p.color=0 !p.background=255 !p.charsize=1.2 time_stamp,/off date_compress=strcompress(strmid(date,0,4)+strmid(date,5,2)+strmid(date,8,2),/remove_all) timespan,date,duration ;-------------------------- if w eq 0 then begin thetitle=string('Ground Magnetometer Data : High Latitude : H Component') tplot,'BH',title=thetitle if keyword_set(make_png) then makepng,'thg_l2_mag_hhla_'+string(date_compress)+'_v01',/no_expose thetitle=string('Ground Magnetometer Data : High Latitude : D Component') tplot,'BD',title=thetitle if keyword_set(make_png) then makepng,'thg_l2_mag_dhla_'+string(date_compress)+'_v01',/no_expose thetitle=string('Ground Magnetometer Data : High Latitude : Z Component') tplot,'BZ',title=thetitle if keyword_set(make_png) then makepng,'thg_l2_mag_zhla_'+string(date_compress)+'_v01',/no_expose endif else begin thetitle=string('Ground Magnetometer Data : Low Latitude : H Component') tplot,'BH',title=thetitle if keyword_set(make_png) then makepng,'thg_l2_mag_hlla_'+string(date_compress)+'_v01',/no_expose thetitle=string('Ground Magnetometer Data : Low Latitude : D Component') tplot,'BD',title=thetitle if keyword_set(make_png) then makepng,'thg_l2_mag_dlla_'+string(date_compress)+'_v01',/no_expose thetitle=string('Ground Magnetometer Data : Low Latitude : Z Component') tplot,'BZ',title=thetitle if keyword_set(make_png) then makepng,'thg_l2_mag_zlla_'+string(date_compress)+'_v01',/no_expose endelse ;-------------------------- endfor ; w end