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ESS261, Spring 2009, Final, Due noon on 2009/06/10 30% + bonus=10%

ESS261, Spring 2009, Final, Due noon on 2009/06/10 30% + bonus=10%

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ESS261, Spring 2009, Final, Due noon on 2009/06/10 30% + bonus=10%

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  1. ESS261, Spring 2009, Final, Due noon on 2009/06/10 30% + bonus=10% • Obtain F10.7 data (solar flux) and show its monthly variation correlates with the sunspot number. Bonus: also show correlation with the ionospheric F2 layer density as derived from ionosonde measurements of the critical frequency fo (called foF2 index). • F10.7 data are at SPDF/OMNIweb • Sunspot number data are at NGDC/NOAA • Ionospheric foF2 at WDC in UK (UKSSDC) – must register 30% • Obtain solar wind data from the ion foreshock region, focus on magnetic field waves: determine the direction of propagation, the degree of polarization and ellipticity. • Example: P2 (TH-C) on 2008/08/21,12:30-14:30 UT – focus on a 10-20 minute interval 30% + bonus=10% • Obtain magnetospheric data showing variation in ion fluxes that demonstrate non-gyrotropy and show the remote sensing effect of a boundary (orientation and speed). You can avoid cleanup of SST by performing this for ESA data only, (do not suffer from Sun contamination), using the example shown in class (below). Bonus: do this by fitting particle of different gyrovelocity phase (near 90deg pitch) at multiple energies. • Example: Reproduce Lecture09 (slides 15-17) or Figure 7 from Korotova et al. (on web site) • Determine the direction of approaching wave from the gyrovelocity phase of particles. • Determine speed of boundary motion from the time it takes for particles to isotropize and Larmor radius • Note: to produce gyro-spectrogram of ~90deg pitch angles you can use: thm_part_getspec, probe=sc,pa=[-30,30],data_type=['peir'],angle='gyro',suff='_01to05',erange=[1000,5000]

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