Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 14.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/15/2020   22:37:09   (  -0.04,-137.21) (  -0.05,-137.32)   11.70                80
 01/18/2020   10:42:24   (   0.04,-137.22) (   0.21,-137.94)   82.47                80
 01/19/2020   10:20:48   (   0.04,-137.21) (  -0.82,-133.36)  438.65                80
 01/20/2020   22:45:08   (  -0.05,-137.20) (  -0.38,-138.59)  158.85                80
 01/21/2020   22:23:32   (  -0.05,-137.20) (   0.65,-134.02)  362.01                80
 01/23/2020   10:47:42   (   0.06,-137.19) (   0.53,-139.21)  231.33                80
 01/24/2020   10:26:07   (   0.06,-137.18) (  -0.50,-134.64)  289.13                80
 01/25/2020   22:50:27   (  -0.06,-137.16) (  -0.65,-139.88)  309.41                80
 01/26/2020   22:28:52   (  -0.06,-137.15) (   0.38,-135.30)  210.97                80