TO on page 221 says this about the results of a successful sensor detection:
"However, just because your sensors have picked up a target doesn’t mean the target is visible. Once a sensor has revealed a unit, standard LOS must be established to the unit before it can be revealed."
What exactly does that mean? Does the player just know there is a unit in that hex? Does he know the unit type? Weightclass? Tonnage? Chassis? Is it dependent on the type of sensor used to detect the unit?