Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 9 4.  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)
 09/09/2013   16:18:56   (  22.64, 144.22) 09/09/2013   16:21:22    (  23.62, 139.86)  459.22            146
 09/10/2013   03:35:24   (  22.66, 147.64) 09/10/2013   03:34:08    (  22.00, 144.28)  354.24             76
 09/22/2013   03:02:27   (  11.49, 157.88) 09/22/2013   03:05:39    (  10.44, 153.36)  506.76            192
 09/22/2013   15:39:05   (  19.39, 153.69) 09/22/2013   15:38:09    (  20.12, 150.07)  386.72             56
 09/23/2013   02:54:40   (  22.65, 157.92) 09/23/2013   02:51:03    (  25.97, 154.35)  516.20            217