Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 4 15.  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)
 04/25/2013   03:12:51   (  10.08, 154.52) 04/25/2013   03:16:27    (   8.47, 150.56)  470.86            216
 04/25/2013   15:49:32   (  21.05, 150.38) 04/25/2013   15:49:04    (  21.69, 147.20)  336.67             28
 04/26/2013   03:05:32   (  22.65, 154.22) 04/26/2013   03:01:55    (  24.24, 151.55)  324.87            217
 05/07/2013   15:20:01   (  22.59, 158.10) 05/07/2013   15:23:16    (  23.53, 154.00)  432.14            195
 05/08/2013   02:36:30   (  22.66, 161.54) 05/08/2013   02:36:00    (  22.00, 158.45)  325.77             30
 05/08/2013   15:12:40   (  10.05, 157.81) 05/08/2013   15:09:04    (   6.57, 154.75)  513.92            216