Purpose
Move the telescope a given number of arcseconds east and north
relative to the current position.
Usage
en x y
Arguments
x = number of arcseconds to move EAST; negative values indicate
WEST movement
y = number of arcseconds to move NORTH; negative values indicate
SOUTH movement
Exit values
0 = normal completion
1 = wrong number of arguments
Example
1) move the telescope east 10 arcsec and south 20 arcsec
en 10 -20