Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2018 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)
 05/01/2018   01:05:22   (  80.58, 117.54) 05/01/2018   01:06:28  (  80.59, 117.46)    1.52                66
 05/01/2018   01:56:22   ( -80.58, -75.09) 05/01/2018   01:57:13  ( -80.58, -75.19)    1.78                51
 05/01/2018   02:47:23   (  80.58,  92.10) 05/01/2018   02:47:58  (  80.59,  92.05)    1.01                35
 05/01/2018   03:38:23   ( -80.59,-100.52) 05/01/2018   03:38:43  ( -80.58,-100.59)    1.41                20
 05/01/2018   04:29:24   (  80.59,  66.67) 05/01/2018   04:29:28  (  80.59,  66.65)    0.53                 4
 05/01/2018   05:20:24   ( -80.59,-125.95) 05/01/2018   05:20:13  ( -80.59,-126.00)    1.09                11
 05/01/2018   06:11:25   (  80.59,  41.24) 05/01/2018   06:10:58  (  80.59,  41.24)    0.32                27
 05/01/2018   07:02:25   ( -80.59,-151.37) 05/01/2018   07:01:43  ( -80.59,-151.40)    0.87                42
 05/01/2018   07:53:26   (  80.59,  15.80) 05/01/2018   07:52:28  (  80.59,  15.84)    0.69                58