Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 12 3.  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)
 12/07/2013   18:11:46   (  49.95, -77.72) 12/07/2013   18:05:56    (  49.53, -80.14)  179.95            350
 12/07/2013   19:53:51   (  50.00,-103.26) 12/07/2013   19:47:27    (  49.59,-105.54)  169.91            384