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Tracking Metadata and Lineageof the Data Processing Chainfor Mapping Snow Cover Propertieswith the NASA MODIS;Outline;MODIS image – Sierra Nevada;*;Hindu Kush;Colorado RockiesCLPX13 March 2002;Model structure: MODIS snow-area / albedo;Lineage Capture, Take 1;Using Existing Science Applications;;Earth System Science Workbench (ESSW);Wrap Your App: Scripts Talk to ESSW;ESSW Metadata management;# SST experiment wrapper ? # $L1B is the input Level 1B AVHRR image file # $SST is the output SST image file ? # run legacy command nitpix: creates SST image from L1B image ? $base_temp = 5.0; $temp_step = 0.1; ... ? system(nitpix base_temp=$base_temp temp_step=$temp_step ... $L1B $SST); ? # start recording ESSW metadata ? beginXMLBld($ENV{USER}, PRODUCTION); ? # get metadata for input file ? $L1B_ID = findSciObjFromFile($L1B); ;# create metadata for SST image ? $SST_ID = createMetadata(avhrr_sst); ? addValue($SST_ID, avhrr_sst.scene_id.satellite, $satellite); addValue($SST_ID, avhrr_sst.scene_id.pass_date, $pass_date); ... ? saveToDB($SST_ID, avhrr_sst); closeMetadata($SST_ID); ? saveDigest($SST, $SST_ID); ? ; # create metadata for SST experiment ? $exp = createExperimentMetadata(avhrr_sstModel); $exp_step = createExpStepMetadata($exp, avhrr_sstExpStp); ? addValue($exp_step, avhrr_sstExpStp.base_temp, $base_temp); addValue($exp_step, avhrr_sstExpStp.temp_step, $temp_step); ... ? saveToDB($exp_step, avhrr_sstExpStp); closeMetadata($exp_step); # connect input and output images to experiment ? registerExperimentInputs($exp, $L1B_ID); registerExperimentOutputs($exp, $SST_ID); ? # finish recording ESSW metadata ? endXMLBld(); ;;Process graph reconstructedfrom ESSW database;ESSW Lessons;Lineage Capture, Take 2;;From ESSW to ES3: Summary;From Wrappers to Probulators;From Wrappers to Probulators;Probulator patterns;ES3 Lineage Architecture;Probulating IDL: Instrumenting the code;Probulating IDL: Results;Probulating bash: Passive Monitoring ;Probulating bash: Results;Now What?;Th