Observational signatures for shocks in the solar photosphere – possible HINODE/SOT observations
Computer experiments for the scientific analysis of data of the solar photosphere from observations...
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Transcript of Computer experiments for the scientific analysis of data of the solar photosphere from observations...
Computer experiments for the scientific analysis
of data of the solar photosphere from observations and simulations
M. Schüssler, D. Schmitt, A. VöglerMax-Planck-Institut für Aeronomie
XLAB Science CampJuly 2003
• How does granulation appear in observations?• Correlation between brightness and vertical velocity• Granulation in a computer simulation and comparison with observation• Adaptation of the simulation results to the observational conditions • Interaction of convection and magnetic field in a simulation: correlation between magnetic field, brightness and velocity
Qualitative and quantitative descriptionof images of the solar photosphereand recognition of physical correlations
Qualitative description
Recognition of typical structures or patterns, typical sizes, comparison of various physical quantities
Quantitative descriptionby statistical methods
Mean value:
Standarddeviation:
Histogram:
Scatter plot:
Working with IDLIDL = Interactive Data LanguagePackage for the visualisation and analysis of data
Start with command „idl“, prompts with string IDL>
IDL> .r idlrc: initial settings
IDL> .r load: reads data sets i_obs, v_obs, i_sim, v_sim, ...
IDL> view,fn: displays a two-dimensional image, fn=i_obs, …
IDL> statistics,fn: computes mean value and standard deviation
IDL> histogram,fn: displays a histogram
IDL> scatter,fn1,fn2: scatter plot
IDL> smooth,fn: smoothes an image
IDL> exit
Please, write detailed notes of
your findings and results.
Have fun!