Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2013 4 20.  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)
 04/25/2013   18:43:03   (  49.98, -87.13) 04/25/2013   18:41:40    (  49.52, -89.77)  196.79             83
 04/25/2013   20:25:08   (  50.00,-112.66) 04/25/2013   20:23:11    (  49.58,-115.17)  186.69            117
 04/26/2013   07:05:28   (  30.65, -76.74) 04/26/2013   06:59:53    (  31.03, -78.71)  192.45            335
 04/26/2013   08:48:08   (  28.59,-102.84) 04/26/2013   08:41:58    (  28.98,-104.65)  182.09            370