Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 2 23.  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)
 03/06/2013   14:44:07   (  16.08, 165.57) 03/06/2013   14:45:51    (  18.17, 162.28)  420.20            104
 03/06/2013   16:24:19   (  22.63, 141.67) 03/06/2013   16:25:51    (  23.44, 138.21)  366.21             92
 03/07/2013   03:40:50   (  22.69, 145.10) 03/07/2013   03:38:37    (  22.19, 142.64)  258.94            133
 03/19/2013   03:10:22   (  17.47, 153.69) 03/19/2013   03:11:51    (  16.70, 150.29)  372.07             89
 03/19/2013   15:47:15   (  12.97, 149.34) 03/19/2013   15:44:28    (  13.50, 146.87)  273.72            167