Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2014 6 21.  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)
 06/29/2014   19:33:22   (  50.00, -96.09) 06/29/2014   19:27:02    (  49.47, -99.22)  232.82            380
 06/29/2014   21:15:25   (  49.96,-121.59) 06/29/2014   21:08:32    (  49.47,-124.60)  223.30            413