Simultaneous Nadir Overpasses (SNOs) between GOES-15 and NOAA-19
TLE Epoch: 2016 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)
 12/21/2016   00:04:19   (   0.11,-135.09) (  -0.27,-136.82)  197.05                80
 12/21/2016   23:55:34   (   0.11,-135.06) (   0.36,-134.05)  116.89                80
 12/22/2016   23:44:10   (   0.10,-135.04) (   1.00,-131.27)  430.71                80
 12/24/2016   12:14:28   (  -0.11,-135.02) (   0.84,-139.18)  474.87                80
 12/25/2016   12:03:04   (  -0.11,-134.99) (   0.22,-136.40)  161.51                80
 12/26/2016   11:54:19   (  -0.10,-134.95) (  -0.40,-133.62)  151.69                80
 12/27/2016   11:42:55   (  -0.09,-134.92) (  -1.03,-130.85)  464.72                80
 12/29/2016   00:13:28   (   0.10,-134.83) (  -0.84,-138.82)  455.40                80
 12/30/2016   00:02:04   (   0.10,-134.79) (  -0.20,-136.04)  142.63                80
 12/30/2016   23:53:19   (   0.09,-134.75) (   0.45,-133.27)  169.96                80
 12/31/2016   23:41:54   (   0.09,-134.71) (   1.04,-130.48)  482.40                80
 01/02/2017   12:12:15   (  -0.10,-134.68) (   0.74,-138.41)  426.09                80