Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP over region 
TLE Epoch: 2013 5 6.  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)
 05/07/2013   15:19:59   (  22.61, 158.12) 05/07/2013   15:23:15    (  23.55, 154.02)  432.50            196
 05/08/2013   02:36:29   (  22.69, 161.55) 05/08/2013   02:36:00    (  22.03, 158.46)  326.14             29
 05/08/2013   15:12:38   (  10.06, 157.83) 05/08/2013   15:09:02    (   6.64, 154.77)  507.78            216
 05/20/2013   03:46:43   (  13.24, 145.69) 05/20/2013   03:49:25    (  12.33, 141.76)  438.03            162
 05/20/2013   14:43:27   (  10.05, 165.19) 05/20/2013   14:42:58    (   9.23, 161.72)  391.52             29
 05/20/2013   16:23:24   (  17.51, 141.44) 05/20/2013   16:21:56    (  18.16, 138.43)  326.89             88
 06/01/2013   15:52:43   (  22.62, 150.09) 06/01/2013   15:55:03    (  23.50, 146.12)  418.07            140
 06/02/2013   03:09:17   (  22.66, 153.50) 06/02/2013   03:07:47    (  22.03, 150.57)  309.70             90