Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 3 17.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/17/2021   22:45:56   (   0.05,-137.21) (  -0.10,-137.98)   87.11                80
 03/18/2021   22:29:39   (   0.05,-137.21) (   0.92,-133.39)  435.41                80
 03/20/2021   10:51:06   (  -0.04,-137.20) (   0.29,-138.56)  155.84                80
 03/21/2021   10:29:30   (  -0.04,-137.19) (  -0.78,-133.98)  366.11                80
 03/22/2021   22:51:06   (   0.03,-137.17) (  -0.42,-139.19)  229.88                80
 03/23/2021   22:34:49   (   0.03,-137.16) (   0.60,-134.60)  291.72                80
 03/25/2021   10:56:17   (  -0.02,-137.14) (   0.56,-139.78)  300.71                80
 03/26/2021   10:34:39   (  -0.02,-137.13) (  -0.45,-135.19)  220.44                80
 03/27/2021   22:56:16   (   0.01,-137.10) (  -0.73,-140.40)  376.65                80
 03/28/2021   22:39:58   (   0.01,-137.08) (   0.29,-135.81)  144.19                80
 03/30/2021   11:01:27   (  -0.01,-137.05) (   0.89,-140.99)  449.51                80