Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NOAA-19
TLE Epoch: 2017 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 09/20/2017   12:38:17   (   0.19,-135.39) (   0.71,-137.63)  256.28                80
 09/21/2017   12:29:28   (   0.20,-135.40) (   0.06,-134.84)   64.65                80
 09/22/2017   12:18:00   (   0.21,-135.42) (  -0.59,-132.04)  385.50                80
 09/25/2017   00:36:54   (  -0.18,-135.36) (  -0.59,-137.18)  207.16                80
 09/26/2017   00:28:05   (  -0.18,-135.37) (   0.03,-134.37)  113.47                80
 09/27/2017   00:16:37   (  -0.19,-135.38) (   0.71,-131.58)  434.01                80
 09/28/2017   12:46:54   (   0.15,-135.49) (   1.09,-139.49)  457.59                80
 09/29/2017   12:35:25   (   0.15,-135.49) (   0.43,-136.70)  137.79                80
 09/30/2017   12:26:37   (   0.16,-135.49) (  -0.24,-133.91)  181.86                80