Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 5 14.  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)
 05/20/2013   03:46:43   (  13.25, 145.69) 05/20/2013   03:49:25    (  12.31, 141.77)  438.38            162
 05/20/2013   14:43:27   (  10.02, 165.19) 05/20/2013   14:42:58    (   9.25, 161.73)  389.96             29
 05/20/2013   16:23:22   (  17.61, 141.47) 05/20/2013   16:21:55    (  18.23, 138.45)  327.09             87
 06/01/2013   15:52:42   (  22.59, 150.09) 06/01/2013   15:55:03    (  23.51, 146.12)  418.90            141
 06/02/2013   03:09:16   (  22.68, 153.50) 06/02/2013   03:07:48    (  22.07, 150.56)  310.39             88