Further to my last message, I have just learned officially that the launch period is 16:30 to 19:00 UTC. Also, I have obtained the following NOTAMS rectangle coordinates: 34 deg 39 min N, 120 deg 38 min W 34 deg 38 min N, 120 deg 33 min W 34 deg 27 min N, 120 deg 41 min W 34 deg 26 min N, 120 deg 36 min W Calculating the azimuth along the long sides of the rectangle, I obtain 191.65 deg for both sides. That is about right for a sun-synchronous orbit, similar to that of the KeyHoles'. So I am now certain that this will be a KeyHole, and I estimate launch about 18:07 UTC, or up to 15 min later. Ted Molczan