Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 4 10.  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)
 04/13/2013   07:41:05   (  45.65, -81.85) 04/13/2013   07:39:49    (  46.19, -84.82)  237.67             76
 04/13/2013   09:23:44   (  43.68,-108.13) 04/13/2013   09:21:54    (  44.17,-110.98)  234.46            110
 04/13/2013   19:12:02   (  49.97, -94.44) 04/13/2013   19:06:57    (  49.64, -96.16)  129.06            305
 04/13/2013   20:54:07   (  49.99,-119.97) 04/13/2013   20:48:28    (  49.70,-121.56)  118.98            339