Simultaneous Nadir Overpasses (SNOs) near US between NOAA-19 and NPP
TLE Epoch: 2012 4 16.  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)
 04/21/2012   07:30:20   (  49.92, -78.93) 04/21/2012   07:32:00    (  50.42, -81.44)  187.14            100
 04/21/2012   09:12:25   (  49.94,-104.44) 04/21/2012   09:13:30    (  50.41,-106.82)  177.02             65
 04/21/2012   17:20:34   (  49.98, -67.74) 04/21/2012   17:18:52    (  49.71, -69.14)  104.28            102
 04/21/2012   19:02:39   (  49.96, -93.26) 04/21/2012   19:00:22    (  49.72, -94.51)   94.12            137
 04/21/2012   20:44:45   (  49.99,-118.79) 04/21/2012   20:41:53    (  49.78,-119.92)   83.82            172
 04/22/2012   07:26:05   (  27.29, -83.90) 04/22/2012   07:19:33    (  27.41, -84.42)   53.42            392
 04/22/2012   09:10:15   (  20.01,-111.29) 04/22/2012   09:03:08    (  20.08,-111.66)   39.00            427