A quick and reliable method to

to compute Emission Measures

from SDO/AIA EUV images

Based on Cheung, Boerner, Schrijver, Testa, Chen, Peter & Malanushenko (2015ApJ...807..143C)

Tested against various coronal models

(from log-normal to realistic MHD)

Returns positive-definite DEM solutions

Speedy: up to 10,000 DEM solutions

per sec on one IDL thread

Try Now*

Download aia_sparse_em_init.pro & sparsee_exercise1.pro

Download sample data (5.5 MB)

IDL>.compile aia_sparse_em_init

IDL>.r sparse_exercise1

*Requires SolarSoft packages for AIA and XRT

More sample code

aia_sparse_em_init.pro for Sparse DEM code

sparse_exercise1.pro for DEM Solve

sparse_exercise2.pro for Sensivity to Noise

sparse_exercise3.pro for synthesizing coronal emission line images

aiaxrt.pro for Joint AIA-XRT DEMs

Flares from

Evaporation to

Condensation

- Jing et al. (2017ApJ...842L..18J)

Track Global Coronal Thermal Evolution

Want more? Get the Full Tutorial

Online slideshow

Full PDF slides

Brought to you by the SDO/AIA Team at LMSAL