Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NOAA-19
TLE Epoch: 2017 12 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)
 12/20/2017   00:55:34   (   0.10,-135.36) (  -0.62,-138.53)  362.06                80
 12/21/2017   00:44:04   (   0.10,-135.35) (   0.01,-135.73)   43.08                80
 12/22/2017   00:29:53   (   0.09,-135.33) (   0.65,-132.92)  275.76                80
 12/24/2017   12:51:11   (  -0.10,-135.35) (   0.48,-137.98)  300.22                80
 12/25/2017   12:42:21   (  -0.10,-135.33) (  -0.16,-135.18)   18.61                80
 12/26/2017   12:30:49   (  -0.09,-135.32) (  -0.75,-132.36)  336.82                80
 12/29/2017   00:52:26   (   0.10,-135.22) (  -0.40,-137.50)  259.56                80
 12/30/2017   00:38:14   (   0.09,-135.20) (   0.19,-134.68)   58.08                80
 12/31/2017   00:26:44   (   0.08,-135.17) (   0.84,-131.88)  375.45                80