No, that's not showing light reflected from the sun. In the still image, the radar source (aka Earth) is to the left; in the animation it's at the top. In the

No, that's not showing light reflected from the sun. In the still image, the radar source (aka Earth) is to the left; in the animation it's at the top. In the still image, the vertical dimension is the bearing of the transmitted radar signal, while the horizontal dimension is distance away from Earth, as computed by the time of flight of the radar signals. In the animation those are swapped.