Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2012 9 6.  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)
 09/14/2012   15:24:24   (  22.63, 155.94) 09/14/2012   15:27:57    (  23.38, 152.56)  356.39            213
 09/15/2012   02:41:01   (  22.67, 159.37) 09/15/2012   02:40:41    (  22.18, 157.03)  246.31             20
 09/15/2012   15:17:09   (  10.03, 155.62) 09/15/2012   15:13:33    (   6.98, 153.45)  415.41            216
 09/27/2012   03:53:41   (  17.65, 142.11) 09/27/2012   03:55:07    (  17.04, 139.29)  306.87             86
 09/27/2012   14:47:51   (  14.64, 163.72) 09/27/2012   14:45:40    (  15.07, 161.69)  224.02            131