Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 7 30.  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)
 08/03/2013   03:42:27   (  16.51, 146.70) 08/03/2013   03:44:13    (  15.57, 142.74)  436.08            106
 08/03/2013   16:19:18   (  14.02, 142.37) 08/03/2013   16:16:49    (  14.69, 139.34)  334.96            149
 08/15/2013   15:47:16   (  22.62, 151.95) 08/15/2013   15:49:12    (  23.56, 147.81)  436.80            116
 08/16/2013   03:03:39   (  22.67, 155.40) 08/16/2013   03:01:56    (  22.01, 152.24)  333.02            103
 08/28/2013   02:31:20   (  13.22, 165.19) 08/28/2013   02:34:02    (  12.21, 160.90)  479.00            162
 08/28/2013   15:08:10   (  17.33, 160.87) 08/28/2013   15:06:38    (  18.05, 157.51)  365.04             92