Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 1 4.  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)
 01/16/2013   02:32:12   (  19.24, 162.63) 01/16/2013   02:33:11    (  18.56, 159.56)  331.30             59
 01/16/2013   15:08:56   (  11.38, 158.35) 01/16/2013   15:05:43    (  11.86, 156.21)  239.32            193
 01/28/2013   03:43:16   (  10.52, 146.37) 01/28/2013   03:46:44    (   9.66, 142.63)  419.89            208
 01/28/2013   14:40:27   (  11.15, 165.49) 01/28/2013   14:40:19    (  11.79, 162.56)  326.95              8
 01/28/2013   16:19:56   (  20.25, 142.15) 01/28/2013   16:19:15    (  20.82, 139.33)  300.38             41
 01/29/2013   03:35:51   (  22.64, 146.16) 01/29/2013   03:32:15    (  25.66, 143.54)  428.33            216