Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 7 25.  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)
 08/03/2013   03:42:25   (  16.43, 146.72) 08/03/2013   03:44:12    (  15.50, 142.76)  435.90            107
 08/03/2013   16:19:17   (  14.05, 142.37) 08/03/2013   16:16:49    (  14.70, 139.34)  334.54            148
 08/15/2013   15:47:12   (  22.64, 151.96) 08/15/2013   15:49:10    (  23.60, 147.82)  437.03            118
 08/16/2013   03:03:36   (  22.67, 155.40) 08/16/2013   03:01:56    (  22.04, 152.24)  333.42            100