Ectoplasm program permits you to compute spectral energy on ellipses
referenced by integer ( between 0 to NMSMAX ) for spectral fields of Aladin files.

Link to ECTO Documentation VERSION 3.0 of 2007/03/01 (by Jean-Daniel GRIL)

For details on the algorithms of ECTOPLASM (routines ELIPS_NRJ, EWN2MN, VORTI, DIVERG from DATAS_FA module) see the joined file.