Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NOAA-19
TLE Epoch: 2017 12 21.  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)
 12/22/2017   00:29:53   (   0.09,-135.33) (   0.66,-132.92)  275.56                80
 12/24/2017   12:51:11   (  -0.10,-135.35) (   0.48,-137.98)  300.36                80
 12/25/2017   12:42:20   (  -0.10,-135.33) (  -0.11,-135.17)   18.48                80
 12/26/2017   12:30:49   (  -0.09,-135.32) (  -0.75,-132.36)  336.65                80
 12/29/2017   00:52:26   (   0.10,-135.22) (  -0.40,-137.50)  259.87                80
 12/30/2017   00:38:15   (   0.09,-135.19) (   0.19,-134.68)   57.78                80
 12/31/2017   00:26:44   (   0.09,-135.17) (   0.84,-131.88)  375.09                80
 01/02/2018   12:48:01   (  -0.08,-135.13) (   0.35,-136.93)  205.69                80
 01/03/2018   12:39:10   (  -0.08,-135.10) (  -0.30,-134.13)  111.24                80
 01/04/2018   12:27:40   (  -0.07,-135.07) (  -0.95,-131.32)  428.11                80