Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 4 11.  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)
 04/12/2017   23:04:44   (  80.86, 142.79) 04/12/2017   23:05:59  (  80.87, 142.85)    1.48                75
 04/12/2017   23:55:44   ( -80.87, -49.76) 04/12/2017   23:56:44  ( -80.87, -49.82)    1.13                60
 04/13/2017   00:46:45   (  80.87, 117.52) 04/13/2017   00:47:29  (  80.87, 117.45)    1.38                44
 04/13/2017   01:37:46   ( -80.86, -75.38) 04/13/2017   01:38:14  ( -80.87, -75.22)    2.93                28
 04/13/2017   02:28:47   (  80.86,  91.89) 04/13/2017   02:28:59  (  80.87,  92.05)    2.92                12
 04/13/2017   03:19:47   ( -80.87,-100.64) 04/13/2017   03:19:44  ( -80.87,-100.62)    0.40                 3
 04/13/2017   04:10:48   (  80.87,  66.63) 04/13/2017   04:10:29  (  80.87,  66.64)    0.57                19
 04/13/2017   05:01:48   ( -80.87,-125.90) 04/13/2017   05:01:14  ( -80.87,-126.03)    2.28                34
 04/13/2017   05:52:49   (  80.87,  41.36) 04/13/2017   05:51:59  (  80.87,  41.24)    2.18                50