18 November 2004AstroGrid Solar Movie Maker VOTechKickoff

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VOTech Kick-off Meeting
AstroGrid Solar Movie Maker Deploying SolarSoft
IDL tools with CEA Elizabeth Auden Silvia
Dalla 18 November 2004
18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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AstroGrid Solar Movie Maker

• Accessing TRACE data and SolarSoft data
  reduction
• Generating solar MPEGs
• Deploying IDL as a CEA grid tool
• Example Creating a solar movie with AstroGrid

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
3
TRACE Data

• TRACE is a high resolution (0.5), high cadence
  (20 s) EUV solar imager.
• SURF TRACE archive at MSSL hourly files with
  gt100 images.

TRACE files are presented to the movie maker tool
as a series of URLs inside a VOTable. CEA
downloads the URLs as temporary files local to
the movie maker tool.
18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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SolarSoft TRACE Analysis

• SolarSoft a multi-instrument IDL library for
  analysis of solar images.
• SolarSoft also provides a library of calibration
  files and ancillary data.
• Several routines applied to TRACE raw images
  read hourly data file, select required wavelength
  and resolution, calibrate images.
• TRACE routines used read_trace, trace_prep,
  trace_scale

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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MPEG Generation

• One MPEG per hourly TRACE file is generated with
  IDL
• Mpeg_open
• Mpeg_put
• Mpeg_save
• Mpeg_close
• MPEG generation is tightly controlled, so rate,
  image size, and encoding type are known to be
  identical.
• MPEGs from multiple hourly TRACE files are put
  together using simple Unix concatenation facility.

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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CallMakeMPEGFitsImages tool

• So, whats under the hood?
• Input output filename, name(s) of 1 or more
  hourly TRACE files
• Confirm that all input files are valid hourly
  TRACE files
• Loop through TRACE files
• a. Reduce data with SolarSoft TRACE tools
• b. Generate MPEG with IDL MPEG encoding
• 4. Concatenate all hourly MPEGs into one movie
• 5. Output one MPEG solar movie written to MySpace

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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CEA Interface Unix shell script

• IDL what we didnt use
• Ion / IonScript - required extra licensing
• RPCs - vetoed by MSSL system administrator
• IDL VM - code restrictions, obnoxious splash
  screen
• Interactive routines no dialog boxes or other
  GUIs
• Solution shell script to generate IDL SolarSoft
  session, execute IDL data reduction and MPEG
  encoding, and concatenate MPEGs.

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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Configuration of Tool with CEA

• Deploy local installation of CEA with maven
• Configure a work.dir directory containing tool
  files
• Fill in AstroGrid CEA registry template
• Provide tool name and other curation information
• Declare AstroGrid AuthorityID
• Locate MySpace (remote or local)
• Specify input(s) and output(s) data / file
  type, number, syntax, etc
• Use maven to finish setup, configuration, and
  AstroGrid update
• If all goes according to plan, tool name appears
  in AstroGrid portal workflow dropdown menu.

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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Example TRACE data search
(screen shot of AG portal TRACE data search)
18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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Example Solar Movie Workflow
(screen shot of AG portal movie maker workflow)
18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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Example Movie Maker result
(Hint look here for exciting solar feature)
MPEG of TRACE hourly file tri20020728.0500
18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off
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Future Work

• Movie Maker tool enhancement
• Accommodate data from TRACE, SOHO-CDS, SOHO-EIT,
  Yohkoh, etc.
• Include derotation algorithm to account for Suns
  rotation during movie
• Allow overlay of 2 or more images displaying
  different wavelengths / magnetic observation in
  each frame.
• Development of further tools
• Collaboration between Silvia (IDL code) and
  Elizabeth (CEA configuration) on new solar
  AstroGrid tools
• Possible new tools a simple movie maker, data
  reduction tool, multiple wavelength / magnetic /
  white light overlay image tool

18 November 2004 AstroGrid Solar Movie Maker
VOTech Kick-off