Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 4 10.  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   (  80.87, 143.05) 04/12/2017   23:05:59  (  80.86, 143.10)    1.52                75
 04/12/2017   23:55:45   ( -80.86, -49.86) 04/12/2017   23:56:45  ( -80.87, -49.92)    1.55                60
 04/13/2017   00:46:46   (  80.86, 117.42) 04/13/2017   00:47:30  (  80.88, 117.34)    1.84                44
 04/13/2017   01:37:46   ( -80.87, -75.11) 04/13/2017   01:38:14  ( -80.86, -74.97)    2.97                28
 04/13/2017   02:28:47   (  80.87,  92.15) 04/13/2017   02:28:59  (  80.86,  92.30)    2.79                12
 04/13/2017   03:19:48   ( -80.87,-100.74) 04/13/2017   03:19:45  ( -80.88,-100.72)    1.12                 3
 04/13/2017   04:10:49   (  80.87,  66.52) 04/13/2017   04:10:30  (  80.88,  66.54)    1.38                19
 04/13/2017   05:01:49   ( -80.87,-126.00) 04/13/2017   05:01:15  ( -80.88,-126.13)    2.35                34
 04/13/2017   05:52:50   (  80.87,  41.26) 04/13/2017   05:52:00  (  80.88,  41.13)    2.34                50