The landing time is classified but there are two NOTAMs on file fitting for the X-37b. The first runs out in 15 minutes, the second runs out the same time tomorrow morning. So for all you HF listeners keep your ears open for the callsign FRONTIER, that will be Vandenberg. They might be using the PLEAD freqs 3238.5 USB and 5081.5 USB. If you live in SoCal try the area ATC freqs, I might have them up on my website socalmilcom.com, it is a work in progress so its not guaranteed.