Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2012 9 15.  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)
 09/15/2012   18:07:41   (  49.97, -79.23) 09/15/2012   18:02:05    (  49.80, -80.16)   68.98            336
 09/15/2012   19:49:46   (  49.97,-104.75) 09/15/2012   19:43:35    (  49.81,-105.53)   58.92            371