I had read something about the landing occurring right before “earthset” as well. The orbiters were going to relay.
Now I wish I could find that...
Maybe that is the reason, the news conference did not mention
a direct link with earth. The Earth will be setting and the rover will be in a deep crater, blocking a direct link with earth. Thus, using Odyessy as a relay link.
ustream.com taped the News Conference. It’s about an hour long and is a great “pump-up” before landing. It was this morning. But can still watch the replay.
07:40 LMST, solar elevation 33.7, still 13 minutes 47 seconds light speed delay between Mars and Earth at the site.
But what do I know, I'm just a cook. ;)
/johnny