This definition appears very rarely
See other definitions of ELS
Other Resources:
Acronym Finder has 74 verified definitions for ELS
The subsystem carries the CM to a sufficent height and to the side, away from the launch vehicle, so that the earth landing subsystem can operate. The subsystem looks like a large rocket connected to the command module by a lattice-work tower. It is 33 feet long and weighs about 8,000 pounds. The maximum diameter of the launch escape assembly is four feet.