Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 1 21.  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)
 01/28/2013   03:43:07   (  10.09, 146.48) 01/28/2013   03:46:43    (   8.53, 142.82)  437.46            216
 01/28/2013   14:40:20   (  11.46, 165.57) 01/28/2013   14:40:32    (  12.12, 162.56)  335.83             12
 01/28/2013   16:19:34   (  21.44, 142.46) 01/28/2013   16:19:13    (  22.04, 139.56)  307.02             21
 01/29/2013   03:35:50   (  22.67, 146.17) 01/29/2013   03:32:13    (  24.39, 143.79)  308.98            217
 02/09/2013   15:50:42   (  22.62, 149.94) 02/09/2013   15:53:42    (  23.45, 146.20)  393.94            180
 02/10/2013   03:07:18   (  22.67, 153.35) 02/10/2013   03:06:27    (  22.10, 150.65)  284.81             51