HMI Data Products
AIA Data Products
MDI Data Products
SHA Data Products
IRIS Data Products
SID Data Products

** Useful Links **

Ring Diagram Analysis Products

Ring diagrams are obtained from a time series of Dopplergrams of a specific area of the Sun, generally tracked with the mean rotation velocity. The three dimensional Fourier transform of this time series gives a power spectrum which is referred to as a "Ring diagram".

Ring-diagram analysis is used to infer the speed and direction of horizontal flows below the solar surface by observing the Doppler shifts of ambient acoustic waves from power spectra of solar oscillations computed over patches of the solar surface. Data analysis pipelines are used to produce spatially-resolved data describing the fluid motions and thermal structure in the sub-surface regions of the solar convection zone. Two pipelines are operational, one producing synoptic views of the flows and structure on regular spatial grids, and the other producing detailed flow and structure anomalies associated with specific target regions.

Available products:


Contacts | JSOC Home | Exportdata | Lookdata | SDO-NASA | Stanford Solar Home | Stanford Solar-Center

SDO Privacy Notice