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) (   0.02,-135.73)   43.19                80
 12/22/2017   00:29:53   (   0.09,-135.33) (   0.65,-132.92)  275.65                80
 12/24/2017   12:51:11   (  -0.10,-135.35) (   0.49,-137.98)  300.31                80
 12/25/2017   12:42:21   (  -0.10,-135.33) (  -0.16,-135.18)   18.44                80
 12/26/2017   12:30:50   (  -0.09,-135.32) (  -0.80,-132.37)  336.69                80
 12/29/2017   00:52:26   (   0.10,-135.22) (  -0.41,-137.50)  259.80                80
 12/30/2017   00:38:15   (   0.09,-135.20) (   0.23,-134.69)   57.84                80
 12/31/2017   00:26:44   (   0.09,-135.17) (   0.82,-131.88)  375.14                80
 01/02/2018   12:48:02   (  -0.08,-135.13) (   0.31,-136.94)  205.72                80
 01/03/2018   12:39:10   (  -0.08,-135.10) (  -0.28,-134.12)  111.24                80