Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 2 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)
 02/22/2013   02:35:45   (  13.06, 162.97) 02/22/2013   02:38:29    (  12.24, 159.33)  405.07            164
 02/22/2013   15:12:27   (  17.67, 158.71) 02/22/2013   15:11:01    (  18.23, 155.99)  294.23             86
 03/06/2013   14:44:09   (  16.17, 165.58) 03/06/2013   14:45:54    (  18.02, 162.24)  410.07            105
 03/06/2013   16:24:23   (  22.60, 141.65) 03/06/2013   16:25:52    (  23.41, 138.20)  364.77             89
 03/07/2013   03:40:53   (  22.65, 145.09) 03/07/2013   03:38:37    (  22.17, 142.64)  257.50            136
 03/19/2013   03:10:42   (  18.03, 153.51) 03/19/2013   03:12:01    (  17.25, 150.16)  366.37             79
 03/19/2013   15:47:36   (  12.37, 149.15) 03/19/2013   15:44:39    (  12.90, 146.73)  269.44            177