KEPLER_0 in the computation (Azimut Zero corresponds to the ori-
ented minor axis, i.e. is at KEPLER_ROTA in the sky plane).
For example 90 270 indicates Az between 90 and 270 degrees, while 270 90
indicates As from 0 to 90 and 270 to 360.
The Azimut coverage can be visualized using command SHOW KEPLER_VELO.