Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2012 6 18.  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)
 06/21/2012   02:49:01   (  14.65, 158.57) 06/21/2012   02:51:18    (  14.01, 155.85)  301.51            137
 06/21/2012   15:25:56   (  15.67, 154.16) 06/21/2012   15:23:56    (  16.03, 152.38)  194.30            120
 07/03/2012   14:57:00   (  21.36, 162.39) 07/03/2012   14:56:37    (  21.85, 160.18)  234.86             23
 07/04/2012   03:55:15   (  22.65, 140.64) 07/04/2012   03:51:39    (  26.58, 138.55)  485.42            216
 07/15/2012   16:11:26   (  22.64, 144.04) 07/15/2012   16:12:03    (  23.19, 141.55)  262.20             37
 07/16/2012   03:27:55   (  22.68, 147.49) 07/16/2012   03:24:45    (  22.37, 146.03)  153.99            190