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   21:43:06   (  80.71, 164.33) 10/20/2017   21:44:18  (  80.76, 165.75)   26.19                72
 10/20/2017   22:34:03   ( -80.76, -26.74) 10/20/2017   22:35:02  ( -80.75, -26.70)    1.95                59
 10/20/2017   23:25:03   (  80.76, 140.42) 10/20/2017   23:25:48  (  80.76, 140.34)    1.43                45
 10/21/2017   00:16:05   ( -80.76, -52.45) 10/21/2017   00:16:33  ( -80.77, -52.46)    1.40                28
 10/21/2017   01:07:04   (  80.76, 115.08) 10/21/2017   01:07:18  (  80.76, 114.93)    2.61                14
 10/21/2017   01:58:06   ( -80.76, -77.80) 10/21/2017   01:58:03  ( -80.77, -77.87)    1.59                 3
 10/21/2017   02:49:06   (  80.76,  89.37) 10/21/2017   02:48:48  (  80.77,  89.52)    2.78                18
 10/21/2017   03:40:07   ( -80.77,-103.15) 10/21/2017   03:39:33  ( -80.77,-103.28)    2.37                34
 10/21/2017   04:31:07   (  80.76,  64.03) 10/21/2017   04:30:18  (  80.77,  64.11)    1.54                49