Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 11 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/19/2020   10:42:37   (   0.01,-137.19) (   0.15,-137.79)   68.72                80
 11/20/2020   10:26:21   (   0.01,-137.18) (  -0.89,-133.21)  452.37                80
 11/21/2020   22:45:18   (  -0.01,-137.16) (  -0.30,-138.43)  145.15                80
 11/22/2020   22:29:02   (  -0.01,-137.15) (   0.74,-133.85)  375.87                80
 11/24/2020   10:47:51   (   0.01,-137.13) (   0.42,-139.04)  217.44                80
 11/25/2020   10:31:34   (   0.01,-137.11) (  -0.56,-134.45)  303.41                80
 11/26/2020   22:50:31   (  -0.01,-137.09) (  -0.61,-139.67)  294.61                80
 11/27/2020   22:34:14   (  -0.01,-137.07) (   0.43,-135.09)  225.90                80
 11/29/2020   10:53:04   (   0.01,-137.04) (   0.74,-140.27)  368.54                80
 11/30/2020   10:36:47   (   0.01,-137.02) (  -0.30,-135.69)  151.40                80
 12/01/2020   22:55:44   (  -0.00,-136.98) (  -0.91,-140.90)  448.05                80