Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 5 9.  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)
 05/20/2013   03:46:43   (  13.23, 145.70) 05/20/2013   03:49:25    (  12.29, 141.77)  438.36            162
 05/20/2013   14:43:27   (  10.05, 165.20) 05/20/2013   14:42:58    (   9.27, 161.73)  389.97             29
 05/20/2013   16:23:22   (  17.58, 141.46) 05/20/2013   16:21:55    (  18.20, 138.44)  327.08             87
 06/01/2013   15:52:40   (  22.61, 150.10) 06/01/2013   15:55:04    (  23.51, 146.12)  419.83            144
 06/02/2013   03:09:14   (  22.67, 153.51) 06/02/2013   03:07:49    (  22.07, 150.55)  311.52             85