Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2012 12 27.  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)
 01/03/2013   15:45:06   (  22.59, 151.17) 01/03/2013   15:46:57    (  23.34, 147.83)  351.68            111
 01/04/2013   03:01:37   (  22.70, 154.60) 01/04/2013   02:59:40    (  22.21, 152.29)  243.49            117
 01/16/2013   02:32:00   (  18.86, 162.74) 01/16/2013   02:33:05    (  18.13, 159.66)  335.14             65
 01/16/2013   15:08:43   (  11.81, 158.47) 01/16/2013   15:05:37    (  12.29, 156.30)  242.09            186