; SOT SSW Tutorial file sp_demo02.pro ; ;The following tutorial is found in the SSW distribution in the following file: ;$SSW/hinode/sot/doc/demo/paris/sp_demo02.pro. In it you will learn how to produce ;SP Level-1 maps from slit images. The slit images must be accessible from a ;local Level-0 SOT data directory. ;First, if necessary, set your SOT_DATA environment variable to point to the ;local database tree: set_logenv,'SOT_DATA','/Users/berger/research/projects/hinode/sot/data' ; Sub-Demo 1.1 - Find and group SP level0 images by map via sotsp_time2scan.pro ;/span_day keyword links slit images for a map across "next UTDay" ;The function sotsp_time2scan returns one structure per map-group ;and includes tags required to subscript 'catalog' and 'files' ;(or 'urls') output parameters for calibration and map generation. scninfo=sotsp_time2scan('27-aug-2007 19:25','27-aug-2007 20:45',/span_day,cat,files) help, scninfo, cat, file ;CAT STRUCT = -> Array[548] ;FILES STRING = Array[548] ;SCNINFO STRUCT = -> Array[92] more,get_infox(scninfo[0:9],'date_obs,nrecs,ssstart,ssstop,macroid') ;2007-08-27T19:32:07.505 6 0 5 6174 ;2007-08-27T19:32:53.839 6 6 11 6175 ;2007-08-27T19:33:40.155 6 12 17 6176 ;2007-08-27T19:34:26.092 6 18 23 6177 ;2007-08-27T19:35:11.010 6 24 29 6178 ;2007-08-27T19:35:57.148 6 30 35 6179 ;2007-08-27T19:36:42.067 6 36 41 6180 ;2007-08-27T19:37:28.692 6 42 47 6181 ;2007-08-27T19:38:14.825 6 48 53 6182 ;2007-08-27T19:39:01.139 6 54 59 6183 ; Show 1st & last Level0 file names (1 slit scan per file) for each map fnames = ssw_strsplit(files,'/',/tail) ; 'files' output, sans full path more, fnames(scninfo[0:9].ssstart) + ' - ' + fnames(scninfo[0:9].ssstop) ; SP4D20070827_193207.5.fits - SP4D20070827_193239.7.fits ; SP4D20070827_193253.8.fits - SP4D20070827_193325.8.fits ; SP4D20070827_193340.1.fits - SP4D20070827_193412.1.fits ; SP4D20070827_193426.0.fits - SP4D20070827_193457.1.fits ; SP4D20070827_193511.0.fits - SP4D20070827_193543.2.fits ; SP4D20070827_193557.1.fits - SP4D20070827_193628.2.fits ; SP4D20070827_193642.0.fits - SP4D20070827_193714.6.fits ; SP4D20070827_193728.6.fits - SP4D20070827_193800.8.fits ; SP4D20070827_193814.8.fits - SP4D20070827_193846.9.fits ; SP4D20070827_193901.1.fits - SP4D20070827_193933.2.fits ; Sub-Demo 1.2 - Example: using above , , & output, calibrate the ; set of slit scan images which for the 2nd map above, e.g. scan=scninfo[1] & spname=time2file(scan.date_obs,/sec) more, spname & mk_dir, spname ; name by 1st scan image & make empty directory ; 20070827_193253 << Uniq SP Map identifier = for this demo. ;Sp_prep.pro is now called to calibrate the Level-0 images. ;This combines the orthogonal polarization slit images to create a ;3-D [x,y,Stokes vector] slit array. sp_prep,files(scan.ssstart:scan.ssstop),outdir=spname, /quiet ; L0->L1 ;Depending on the number of slit images in your scan, the sp_prep calls ;will take a few to many tens of minutes to complete. This is one reason ;why it is probably worth it to check for pre-calibrated Level-1 maps in the ;database, as shown in the previous tutorial. The SOT team intends to produce ;Level-1 SP maps for the entire mission. Currently the processing to accomplish ;this is ongoing. Check the website: ; http://www.lmsal.com/solarsoft/hinode/level2/2006/12/month_index.html ;to see if there are level 1.5 maps for the date of interest. ;Next we generate the 2-D maps from the calibrated spectra. The Stokes component ;maps are sometimes referred to as “Level-1.5” data. stksimages_sbsp,spname,outstokes,outdir=spname ; Level1 -> "Level1.5" help, stks, /str stks_struct_local = ssw_save2struct(concat_dir(spname,'stksimoutput.save')) ;As in the FG tutorial above, we now show how to retrieve Level-0 slit data ;files from a remote database. Aside from fetching the data, the process is ;very similar to the process shown above. We will use the optional /URLS ;switch so that the 'files' output of sotsp_time2scan are urls rather than ;nfs file paths. hinode_server_select, /oslo ; or /lmsal or /darts scninfo=sotsp_time2scan('27-aug-2007 19:25','27-aug-2007 20:45',/span_day,cat,files,/urls) help,scninfo,cat,files ;SCNINFO STRUCT = -> Array[92] << same as 1.1 above ;CAT STRUCT = -> Array[548] << same as 1.1 above ;FILES STRING = Array[548 ] << L0 URLS ;Choose the second scan in the scan structure: scan=scninfo[1] spname=time2file(scan.date_obs,/sec) ; same Map as 1.2 more,spname ; 20061212_035005 << Uniq SP Map identifier = for this demo. mk_dir,spname l0dir = spname + '_l0' mk_dir,l0dir ; create target directory for L0 files ;Now fetch the data from the remote database: sock_copy,files(scan.ssstart:scan.ssstop),out_dir=l0dir ; L0 -> local ;And call sp_prep to calibrate the spectra: sp_prep, file_search(l0dir[0],'*fits*'), outdir=spname, /quiet ; local L0 -> L1 ; Sub-Demo 2.3 - Stokes map creation identical to 1.3 stksimages_sbsp, spname, outstokes, outdir=spname ; Level1 -> "Level1.5" stks_struct_remote = ssw_save2struct(concat_dir(spname,'stksimoutput.save')) end