English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Supergranulation is one of the most visible length scales of solar convectionand has been studied extensively by local helioseismology. We use syntheticdata computed with the Seismic Propagation through Active Regions andConvection (SPARC) code to test regularized-least squares (RLS) inversions ofhelioseismic holography measurements for a supergranulation-like flow. The codesimulates the acoustic wavefield by solving the linearized three-dimensionalEuler equations in Cartesian geometry. We model a single supergranulation cellwith a simple, axisymmetric, mass-conserving flow.  The use of simulated data provides an opportunity for direct evaluation ofthe accuracy of measurement and inversion techniques. The RLS technique appliedto helioseismic-holography measurements is generally successful in reproducingthe structure of the horizontal flow field of the model supergranule cell. Theerrors are significant in horizontal-flow inversions near the top and bottom ofthe computational domain as well as in vertical-flow inversions throughout thedomain. We show that the errors in the vertical velocity are due largely tocross talk from the horizontal velocity.

Testing Helioseismic-Holography Inversions for Supergranular Flows Using Synthetic Data