Just a heads up for anyone at SFO late night (2330) this Thursday, AS and UA will be flying around during the night. The flights is for an evaluation of RNP(required navigational procedure) approches for SFO 28R. Alaska will be operating a 737-700 (a/c reg. unknown right now) from SEA but not land at SFO. Alaska a/c will meet up with a United plane from 2330 to 0500 were they will do pattern work and practice the RNP approach for 28R while other a/c will fly the ILS for 28L. The United type is unknown to me and maybe somebody at UA can find out.
I have watched AS a/c do this before over night and it is very interesting. For any of you that would like to see 2 a/c doing go-arounds at the same time while only a 1,000 feet apart or so at night, this is for you!
Should be able to dig up more info tommorow!