Simultaneous Nadir Overpasses (SNOs) between GOES-16 and NOAA-19
TLE Epoch: 2017 12 20.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  NOAA-19 Lat/Lon    Distance(km)  Time Diff(sec)
 12/20/2017   08:32:07   (   0.02, -75.17) (  -0.36, -73.48)  191.83                80
 12/22/2017   20:56:24   (  -0.01, -75.21) (  -0.80, -78.62)  389.08                80
 12/23/2017   20:44:54   (  -0.01, -75.22) (  -0.16, -75.82)   68.79                80
 12/24/2017   20:30:43   (  -0.01, -75.22) (   0.48, -73.01)  251.71                80
 12/27/2017   08:54:41   (   0.01, -75.19) (   0.65, -78.08)  328.85                80
 12/28/2017   08:43:11   (   0.01, -75.20) (   0.01, -75.27)    8.14                80
 12/29/2017   08:29:00   (   0.01, -75.21) (  -0.64, -72.47)  312.99                80
 12/31/2017   20:53:16   (  -0.02, -75.27) (  -0.57, -77.60)  265.36                80
 01/01/2018   20:39:05   (  -0.02, -75.28) (   0.09, -74.79)   55.84                80
 01/02/2018   20:27:35   (  -0.02, -75.29) (   0.74, -71.99)  377.11                80