Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 6 30.  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)
 07/09/2013   03:10:26   (  16.53, 154.53) 07/09/2013   03:12:11    (  15.64, 150.66)  425.10            105
 07/09/2013   15:47:08   (  14.19, 150.26) 07/09/2013   15:44:42    (  14.81, 147.30)  325.64            146
 07/21/2013   15:15:15   (  22.60, 159.76) 07/21/2013   15:16:48    (  23.47, 155.80)  417.32             93
 07/22/2013   02:31:40   (  22.67, 163.21) 07/22/2013   02:29:30    (  22.05, 160.25)  311.76            130
 07/22/2013   04:11:38   (  15.29, 139.51) 07/22/2013   04:10:08    (  19.01, 135.63)  584.51             90