Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2015 4 20.  Predictions up to the next  14.0 days:

     Date     Time(NOAA-19) NOAA-19 Lat/Lon Date Time(NPP) NPP Lat/Lon    Distance(km)  Time Diff(sec)
 04/22/2015   15:01:48   (  81.01, -97.01) 04/22/2015   15:02:57  (  81.01, -97.19)    3.01                69
 04/22/2015   15:52:54   ( -81.01,  70.23) 04/22/2015   15:53:41  ( -81.00,  70.38)    2.90                47
 04/22/2015   16:43:51   (  81.01,-122.61) 04/22/2015   16:44:27  (  81.01,-122.65)    0.85                36
 04/22/2015   17:34:56   ( -81.00,  45.00) 04/22/2015   17:35:11  ( -81.00,  44.93)    1.33                15
 04/22/2015   18:25:53   (  81.00,-147.83) 04/22/2015   18:25:56  (  81.00,-147.74)    1.62                 3
 04/22/2015   19:16:59   ( -81.00,  19.40) 04/22/2015   19:16:41  ( -81.01,  19.47)    1.16                18
 04/22/2015   20:07:55   (  81.00,-173.05) 04/22/2015   20:07:26  (  81.00,-173.20)    2.67                29
 04/22/2015   20:59:00   ( -80.99,  -5.44) 04/22/2015   20:58:10  ( -80.99,  -5.62)    3.16                50