Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 10 15.  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)
 10/20/2017   21:43:04   (  80.75, 165.70) 10/20/2017   21:44:18  (  80.76, 165.85)    2.73                74
 10/20/2017   22:34:05   ( -80.76, -26.81) 10/20/2017   22:35:03  ( -80.76, -26.95)    2.42                58
 10/20/2017   23:25:05   (  80.76, 140.36) 10/20/2017   23:25:48  (  80.76, 140.44)    1.41                43
 10/21/2017   00:16:07   ( -80.76, -52.52) 10/21/2017   00:16:33  ( -80.77, -52.36)    3.12                26
 10/21/2017   01:07:06   (  80.76, 115.02) 10/21/2017   01:07:18  (  80.76, 115.03)    0.29                12
 10/21/2017   01:58:08   ( -80.76, -77.86) 10/21/2017   01:58:03  ( -80.77, -77.77)    1.92                 5
 10/21/2017   02:49:07   (  80.77,  89.68) 10/21/2017   02:48:48  (  80.76,  89.62)    1.32                19
 10/21/2017   03:40:09   ( -80.77,-103.21) 10/21/2017   03:39:33  ( -80.77,-103.17)    0.76                36
 10/21/2017   04:31:08   (  80.77,  64.35) 10/21/2017   04:30:18  (  80.77,  64.21)    2.64                50