Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 6 16.  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)
 06/19/2017   23:30:11   (  80.83, 137.44) 06/19/2017   23:31:24  (  80.82, 137.35)    1.83                73
 06/20/2017   00:21:12   ( -80.83, -55.55) 06/20/2017   00:22:09  ( -80.83, -55.47)    1.53                57
 06/20/2017   01:12:13   (  80.83, 111.78) 06/20/2017   01:12:54  (  80.82, 111.94)    2.80                41
 06/20/2017   02:03:13   ( -80.83, -80.85) 06/20/2017   02:03:39  ( -80.83, -80.88)    0.62                26
 06/20/2017   02:54:14   (  80.83,  86.49) 06/20/2017   02:54:24  (  80.83,  86.52)    0.96                10
 06/20/2017   03:45:14   ( -80.84,-106.14) 06/20/2017   03:45:09  ( -80.83,-106.30)    2.73                 5
 06/20/2017   04:36:14   (  80.84,  61.20) 06/20/2017   04:35:53  (  80.83,  61.11)    2.02                21
 06/20/2017   05:27:15   ( -80.83,-131.80) 06/20/2017   05:26:38  ( -80.84,-131.71)    1.73                37
 06/20/2017   06:18:16   (  80.83,  35.55) 06/20/2017   06:17:23  (  80.83,  35.70)    2.67                53