Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 8.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/08/2020   22:49:13   (  -0.06,-137.18) (   0.00,-139.42)  249.26                 0
 09/09/2020   22:31:27   (  -0.05,-137.18) (   0.49,-134.72)  281.08                80
 09/11/2020   10:52:58   (   0.05,-137.19) (   0.64,-139.91)  309.96                80
 09/12/2020   10:31:21   (   0.05,-137.19) (  -0.38,-135.33)  212.19                80
 09/13/2020   22:53:00   (  -0.04,-137.19) (  -0.78,-140.56)  384.01                80
 09/14/2020   22:36:43   (  -0.03,-137.19) (   0.24,-135.98)  137.74                80
 09/16/2020   10:55:32   (   0.03,-137.18) (   0.95,-141.16)  454.47                80
 09/17/2020   10:39:17   (   0.03,-137.18) (  -0.13,-136.60)   67.13                80
 09/19/2020   22:39:18   (  -0.03,-137.16) (  -0.07,-137.23)    9.16                80
 09/22/2020   10:41:52   (   0.03,-137.13) (   0.17,-137.84)   81.15                80