Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2012 12 16.  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)
 12/22/2012   03:37:45   (  11.65, 147.40) 12/22/2012   03:40:54    (  10.82, 143.88)  395.68            189
 12/22/2012   16:14:41   (  18.68, 143.02) 12/22/2012   16:13:33    (  19.20, 140.44)  277.91             68
 12/23/2012   03:30:03   (  22.68, 147.45) 12/23/2012   03:26:26    (  26.88, 144.73)  542.43            217
 01/03/2013   15:45:10   (  22.62, 151.15) 01/03/2013   15:46:52    (  23.34, 147.85)  347.67            102
 01/04/2013   03:01:42   (  22.67, 154.58) 01/04/2013   02:59:36    (  22.22, 152.30)  239.37            126