Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 12 12.  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)
 12/19/2013   03:53:21   (  10.08, 146.10) 12/19/2013   03:56:57    (   7.68, 141.34)  587.61            216
 12/19/2013   14:50:10   (  13.17, 165.58) 12/19/2013   14:50:26    (  14.12, 161.36)  468.16             16
 12/19/2013   16:29:46   (  21.80, 142.17) 12/19/2013   16:29:31    (  22.63, 138.05)  434.35             15
 12/20/2013   03:45:54   (  22.68, 145.82) 12/20/2013   03:42:17    (  22.99, 142.46)  346.19            217
 01/01/2014   03:13:59   (  17.75, 154.78) 01/01/2014   03:15:24    (  16.70, 150.33)  486.82             85
 01/01/2014   15:50:44   (  12.94, 150.52) 01/01/2014   15:47:57    (  13.72, 146.98)  392.53            167