Radarsat2 Incidence Angle and Orbit Pass

Is there any relation between SAR (radarsat2 in particular) incidence angle range with the satellite orbit type?

It sounds like that the “Incidence Angle Near and Far” in the Descending orbit is higher than that of the Ascending orbit? Is this always true?

When it comes to surface water body detection, does that make a significant change if we either use the desc. or asce. imagery?

Any comments?