Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 8 14.  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   18:30:11   (  49.95, -83.18) 08/16/2013   18:23:21    (  49.66, -84.95)  130.97            410
 08/16/2013   20:12:16   (  49.99,-108.71) 08/16/2013   20:04:52    (  49.72,-110.35)  120.96            444