Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2012 8 28.  Predictions up to the next  30.0 days:

Date(NOAA-19)     Time(NOAA-19)   NOAA-19 Lat/Lon   Date(NPP)     Time(NPP)    NPP Lat/Lon    Distance (km)   Time Diff(sec)
 09/02/2012   15:52:11   (  22.61, 148.96) 09/02/2012   15:53:29    (  23.21, 146.16)  295.55             78
 09/03/2012   03:08:46   (  22.70, 152.39) 09/03/2012   03:06:13    (  22.33, 150.63)  185.85            153
 09/14/2012   15:24:20   (  22.59, 155.95) 09/14/2012   15:27:55    (  23.63, 152.61)  360.83            215
 09/15/2012   02:40:56   (  22.66, 159.38) 09/15/2012   02:40:44    (  22.20, 157.01)  249.46             12
 09/15/2012   15:17:05   (  10.04, 155.64) 09/15/2012   15:13:29    (   7.45, 153.53)  369.91            216