Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NOAA-19
TLE Epoch: 2017 12 20.  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)
 12/21/2017   00:44:04   (   0.10,-135.35) (   0.04,-135.73)   43.23                80
 12/22/2017   00:29:54   (   0.09,-135.33) (   0.68,-132.92)  275.74                80
 12/24/2017   12:51:10   (  -0.10,-135.35) (   0.52,-137.97)  300.22                80
 12/25/2017   12:42:20   (  -0.10,-135.33) (  -0.12,-135.17)   18.39                80
 12/26/2017   12:30:49   (  -0.09,-135.32) (  -0.76,-132.36)  336.78                80
 12/29/2017   00:52:25   (   0.10,-135.22) (  -0.45,-137.49)  259.68                80
 12/30/2017   00:38:15   (   0.09,-135.20) (   0.20,-134.69)   57.92                80
 12/31/2017   00:26:44   (   0.08,-135.17) (   0.85,-131.88)  375.29                80
 01/02/2018   12:48:01   (  -0.08,-135.14) (   0.34,-136.93)  205.54                80