EGT full form

Meaning : Elapsed ground time

Category : Aerospace
Sub Category : Metrics 
Type : Initialism

What does EGT mean or stand for ?

Elapsed Ground Time is a measurement metric used by space agencies like NASA and ESA who use this as a reference to calculate parameters of an ongoing mission.With respect to Earth time a clock timer is started from the time of blast off especially in the Space shuttle missions and is useful in order to gauge time specific events progress.