Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2016 4 21.  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)
 04/27/2016   11:28:21   ( -81.01, 134.84) 04/27/2016   11:29:37  ( -81.00, 134.66)    3.27                76
 04/27/2016   12:19:17   (  81.01, -58.11) 04/27/2016   12:20:22  (  81.00, -58.04)    1.15                65
 04/27/2016   13:10:23   ( -81.01, 109.38) 04/27/2016   13:11:07  ( -81.01, 109.25)    2.30                44
 04/27/2016   14:01:19   (  81.01, -83.57) 04/27/2016   14:01:52  (  81.01, -83.45)    2.11                33
 04/27/2016   14:52:25   ( -81.01,  83.92) 04/27/2016   14:52:37  ( -81.01,  83.84)    1.34                12
 04/27/2016   15:43:21   (  81.01,-109.03) 04/27/2016   15:43:22  (  81.01,-108.85)    3.08                 1
 04/27/2016   16:34:27   ( -81.01,  58.46) 04/27/2016   16:34:07  ( -81.01,  58.44)    0.40                20
 04/27/2016   17:25:22   (  81.01,-134.11) 04/27/2016   17:24:52  (  81.01,-134.26)    2.55                30
 04/27/2016   18:16:29   ( -81.01,  33.00) 04/27/2016   18:15:37  ( -81.01,  33.03)    0.63                52