Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 4 8.  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   23:04:45   (  80.86, 142.73) 04/12/2017   23:06:00  (  80.87, 142.80)    1.78                75
 04/12/2017   23:55:45   ( -80.87, -49.79) 04/12/2017   23:56:45  ( -80.87, -49.85)    1.18                60
 04/13/2017   00:46:46   (  80.87, 117.47) 04/13/2017   00:47:30  (  80.87, 117.40)    1.54                44
 04/13/2017   01:37:47   ( -80.86, -75.41) 04/13/2017   01:38:15  ( -80.87, -75.25)    3.04                28
 04/13/2017   02:28:47   (  80.87,  92.21) 04/13/2017   02:28:59  (  80.86,  92.35)    3.02                12
 04/13/2017   03:19:47   ( -80.87,-100.67) 04/13/2017   03:19:44  ( -80.87,-100.65)    0.61                 3
 04/13/2017   04:10:48   (  80.87,  66.57) 04/13/2017   04:10:29  (  80.88,  66.59)    0.95                19
 04/13/2017   05:01:48   ( -80.87,-125.93) 04/13/2017   05:01:14  ( -80.87,-126.05)    2.22                34
 04/13/2017   05:52:49   (  80.87,  41.31) 04/13/2017   05:51:59  (  80.88,  41.19)    2.19                50