Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 5 18.  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)
 05/20/2013   17:33:54   (  49.95, -69.68) 05/20/2013   17:32:02    (  49.50, -72.30)  194.85            112
 05/20/2013   19:15:59   (  49.98, -95.21) 05/20/2013   19:13:33    (  49.57, -97.70)  184.75            146
 05/20/2013   20:58:02   (  49.95,-120.71) 05/20/2013   20:55:01    (  49.51,-123.05)  174.90            181
 05/21/2013   07:39:19   (  27.14, -85.77) 05/21/2013   07:32:45    (  27.51, -87.58)  183.26            394
 05/21/2013   09:21:57   (  25.19,-111.80) 05/21/2013   09:14:49    (  25.51,-113.47)  171.72            428