Simultaneous Nadir Overpasses (SNOs) between NOAA-19 and NPP
TLE Epoch: 2017 6 18.  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, 137.42) 06/19/2017   23:31:24  (  80.82, 137.33)    1.84                73
 06/20/2017   00:21:12   ( -80.82, -55.58) 06/20/2017   00:22:09  ( -80.83, -55.51)    1.53                57
 06/20/2017   01:12:13   (  80.83, 111.76) 06/20/2017   01:12:54  (  80.83, 111.91)    2.66                41
 06/20/2017   02:03:13   ( -80.83, -80.88) 06/20/2017   02:03:39  ( -80.83, -80.92)    0.84                26
 06/20/2017   02:54:14   (  80.83,  86.48) 06/20/2017   02:54:24  (  80.83,  86.50)    0.74                10
 06/20/2017   03:45:14   ( -80.84,-106.17) 06/20/2017   03:45:09  ( -80.84,-106.33)    2.85                 5
 06/20/2017   04:36:15   (  80.84,  61.19) 06/20/2017   04:35:54  (  80.83,  61.09)    2.03                21
 06/20/2017   05:27:16   ( -80.83,-131.83) 06/20/2017   05:26:39  ( -80.84,-131.75)    1.68                37
 06/20/2017   06:18:17   (  80.83,  35.53) 06/20/2017   06:17:24  (  80.83,  35.67)    2.52                53