Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 5 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)
 05/23/2017   18:32:07   (  80.84,-148.55) 05/23/2017   18:33:18  (  80.85,-148.62)    1.45                71
 05/23/2017   19:23:13   ( -80.84,  18.79) 05/23/2017   19:24:03  ( -80.85,  18.63)    2.92                50
 05/23/2017   20:14:08   (  80.85,-173.82) 05/23/2017   20:14:47  (  80.83,-173.67)    3.22                39
 05/23/2017   21:05:15   ( -80.84,  -6.85) 05/23/2017   21:05:33  ( -80.85,  -6.77)    1.98                18
 05/23/2017   21:56:10   (  80.84, 160.53) 05/23/2017   21:56:18  (  80.85, 160.57)    1.09                 8
 05/23/2017   22:47:16   ( -80.85, -32.13) 05/23/2017   22:47:03  ( -80.86, -32.18)    1.31                13
 05/23/2017   23:38:11   (  80.85, 135.26) 05/23/2017   23:37:48  (  80.85, 135.16)    1.80                23
 05/24/2017   00:29:17   ( -80.85, -57.41) 05/24/2017   00:28:33  ( -80.86, -57.59)    3.21                44
 05/24/2017   01:20:13   (  80.85, 109.61) 05/24/2017   01:19:18  (  80.86, 109.75)    2.66                55