Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 6 27.  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   03:10:28   (  16.67, 154.50) 07/09/2013   03:12:11    (  15.75, 150.65)  424.16            103
 07/09/2013   15:47:11   (  14.04, 150.23) 07/09/2013   15:44:43    (  14.68, 147.29)  325.04            148
 07/21/2013   15:15:17   (  22.59, 159.77) 07/21/2013   15:16:46    (  23.46, 155.82)  415.57             89
 07/22/2013   02:31:42   (  22.66, 163.22) 07/22/2013   02:29:28    (  22.05, 160.28)  309.94            134