re: Consecutive flyover
First pass where I am was very poor, and almost on the northern horizon where a lot of them have been in the recent week.
Second pass on the other hand (about 10:30 Pacific) was short, but very bright and spectacular. Both ISS and Shuttle rose directly from the west and hit the zenith before fading out.
The color difference was obvious--the ISS has a much more amber tint from the solar arrays while the Shuttle is pure white.