A Coherence-Based Approach for Tracking Waves in the Solar Corona
arXiv:0808.2978 · doi:10.1007/s11207-008-9257-x
Abstract
We consider the problem of automatically (and robustly) isolating and extracting information about waves and oscillations observed in EUV image sequences of the solar corona with a view to near real-time application to data from the Atmospheric Imaging Array (AIA) on the Solar Dynamics Observatory (SDO). We find that a simple coherence / travel-time based approach detects and provides a wealth of information on transverse and longitudinal wave phenomena in the test sequences provided by the Transition Region and Coronal Explorer (TRACE). The results of the search are "pruned" (based on diagnostic errors) to minimize false-detections such that the remainder provides robust measurements of waves in the solar corona, with the calculated propagation speed allowing automated distinction between various wave modes. In this paper we discuss the technique, present results on the TRACE test sequences, and describe how our method can be used to automatically process the enormous flow of data (~1Tb/day) that will be provided by SDO/AIA after launch in late 2008.
34 pages, 16 figures - in press Solar Physics
References in corpus (2)
Cited by in corpus (19)
- Time-Distance Seismology of the Solar Corona with CoMP
- Advances in Observing Various Coronal EUV Waves in the SDO Era and Their Seismological Applications (Invited Review)
- Global maps of the magnetic field in the solar corona
- Quasi-periodic Propagating Signals in the Solar Corona: The Signature of Magnetoacoustic Waves or High-Velocity Upflows?
- Hinode/EIS observations of propagating low-frequency slow magnetoacoustic waves in fan-like coronal loops
- Observing Episodic Coronal Heating Events Rooted in Chromospheric Activity
- 3D Coronal Slow Modes: Towards 3D Seismology
- STEREO Observations of Quasi-Periodically Driven High Velocity Outflows in Polar Plumes
- Mapping the magnetic field in the solar corona through magnetoseismology
- Observations of Coronal Mass Ejections with the Coronal Multichannel Polarimeter
- Coronal Fourier power spectra: implications for coronal seismology and coronal heating
- Observing the evolution of the Sun's global coronal magnetic field over eight months
- Spectroscopic Observations of Propagating Disturbances in a Polar Coronal Hole: Evidence of Slow Magneto-acoustic Waves
- Damping of Propagating Kink Waves in the Solar Corona
- Web-Based Data Processing System for Automated Detection of Oscillations with Applications to the Solar Atmosphere
- A statistical study of propagating MHD kink waves in the quiescent corona
- Automated Detection of Oscillating Regions in the Solar Atmosphere
- Automatic detection technique for solar filament oscillations in GONG data
- A Global Survey of EUV Corona Power Spectra