Q 3.4 How are satellites located in space?

Satellite position in space at any instant is uniquely defined by a set of six orbital parameters – semi-major axis, eccentricity, inclination, right ascension, argument of perigee and a reference time such as the time a satellite passes the perigee. These parameters are available from the satellite operators, many publish them online.
Orbital parameters can be readily transformed into look angle from location and time of interest by mathematical transformation.