Monthly Archives: August 2014

26. SDO/HMI Multi-height Dopplergrams

Contributed by Kaori Nagashima. Posted on August 15, 2014

Multi-height Doppler velocity maps from two layers separated by 50 km are obtained from combinations of currently recorded HMI filtergrams. Using synthetic data of spectral line profiles produced in a convective environment, we test the ability to recover vertical velocity fields at different heights.