[nradov]

Installing two antennas per aircraft could make the transitions pretty seamless, at the cost of a little extra weight and drag.

[dreamcompiler]

That's how it will have to be done in any case. The only question is whether they'll split the phased array transducers in one large array to look at two satellites at once, or have two separate smaller arrays. Both approaches can be made to work, and the first is probably better aerodynamically.