Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 9 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)
 09/10/2013   19:01:56   (  49.95, -90.94) 09/10/2013   18:55:32    (  49.61, -92.90)  145.43            384
 09/10/2013   20:44:01   (  49.98,-116.48) 09/10/2013   20:37:03    (  49.67,-118.30)  135.40            418