The NOSS 3-6 duo had the best coverage, which includes the full northern arc from Thailand to Kazakhstan determined by the Inmarsat reception:

This would be the second SBIRS HEO payload; the first was lofted June 27, 2006 for the NRO as part of the NROL-22 mission that inaugurated West Coast operations for Delta IV.

"Keyhole 5 (Advanced KH-11, KH-12-5, Improved Crystal, EIS-3, USA 186)" USA 186 USA USA National Reconnaissance Office (NRO) Military Earth Observation Optical Imaging LEO Elliptical 0 264 "1,050" 5.59E-02 97.9 97 "18,000" " 10,000 " 10/19/2005 5 Lockheed Martin USA Vandenberg AFB Titan IV 2005-042A 28888 $1 billion satellite; last use of Titan IV as launch vehicle. JMSR http://www.nro.gov/PressReleases/prs_rel86.html http://www.space.com/missionlaunches/fl_titan4_preview_010930.html

Caught 3 times of #28888, and looks that is very early (~7,4 seconds).
Need help to confirm. This would mean a little maneuver.

USA 186 is the secondary West plane satellite in the KH-11 constellation