I recently installed RT for my KSP and I'm pretty impressed with it so far. I did a lot of research on constellations before trying to make one of my own. I was wondering if I could get opinions on mine.
My goal is to be as efficient as possible. I see people making a 3- or 4-sat constellation around Kerbin, and then tossing extra sats wherever they're needed after that point. I wanted to use less sats to see if I could still get near 100% coverage. I currently have 3 sats around Kerbin for near 100% coverage of the planet AND moons. At least in principle this works. They all have 3 C-88-88s and 1 C-32 (because that's what I got unlocked in career for now). All 3 sats listed below use the 88-88s to communicate with each other and the active vessel.
Sat1: Kerbostationary Orbit directly above the KSC with orbit period of 1 sidereal day (5h59m9.43s), 0 inc, 0 ecc.
Sat2: Kerbopolar Orbit with orbit period of 1/2 sidereal day (2h59m34.71s), 90 inc, 0 ecc. Mean anomaly set so Sat2 is 90 degrees offset from the position that would have both Sat1 and Sat2 closest to each other. Bonus: set longitude of ascending node such that the orbit is parallel to the terminator for a long period of time where you don't need to worry about no sunlight. It's not permanent, but it is useful.
Sat3: SOI Orbit (79 Mm orbit), 45 inc, 0 ecc.
Sat1 and Sat2 together give 100% coverage of Kerbin over seemingly long time periods. Perhaps years? Not sure. I fast forwarded one Earth-year (dunno what that is in Kerbin-years) and everything was still lined up. Sat3 is added to give coverage at nearly every point around both moons. On the non-planetside of the moons, there may be temporary signal blackouts, but, depending on your altitude around those moons and the position of Sat3, that shouldn't happen often. Mitigate by placing a sat around each moon. I'm hard-pressed to find any spot in the Kerbin-system that I don't have a consistent signal.