Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 8 13.  Predictions up to the next  10.0 days:

Date(NOAA-19)     Time(NOAA-19)   NOAA-19 Lat/Lon   Date(NPP)     Time(NPP)    NPP Lat/Lon    Distance (km)   Time Diff(sec)
 08/16/2013   18:30:12   (  49.99, -83.20) 08/16/2013   18:23:22    (  49.70, -84.96)  130.85            410
 08/16/2013   20:12:16   (  49.97,-108.70) 08/16/2013   20:04:52    (  49.70,-110.34)  121.03            444