Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2012 12 22.  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)
 12/22/2012   16:14:38   (  18.76, 143.05) 12/22/2012   16:13:31    (  19.32, 140.47)  278.55             67
 12/23/2012   03:30:01   (  22.66, 147.46) 12/23/2012   03:26:24    (  26.76, 144.76)  532.02            217
 01/03/2013   15:45:07   (  22.64, 151.17) 01/03/2013   15:46:53    (  23.37, 147.85)  349.48            106
 01/04/2013   03:01:39   (  22.65, 154.60) 01/04/2013   02:59:37    (  22.19, 152.31)  241.31            122
 01/15/2013   15:16:40   (  22.63, 158.33) 01/15/2013   15:20:16    (  27.01, 155.19)  580.60            216
 01/16/2013   02:32:31   (  20.12, 162.39) 01/16/2013   02:33:15    (  19.44, 159.39)  322.82             44
 01/16/2013   15:09:15   (  10.52, 158.13) 01/16/2013   15:05:47    (  10.96, 156.04)  232.80            208