Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 12 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/26/2020   10:43:54   (  -0.02,-137.23) (  -0.02,-137.29)    6.77                80
 12/28/2020   22:43:54   (   0.01,-137.22) (  -0.13,-137.92)   78.99                80
 12/29/2020   22:27:37   (  -0.00,-137.22) (   0.87,-133.33)  443.41                80
 12/31/2020   10:46:26   (   0.01,-137.22) (   0.29,-138.52)  147.92                80
 01/01/2021   10:30:09   (   0.01,-137.21) (  -0.71,-133.92)  373.89                80
 01/02/2021   22:49:06   (  -0.01,-137.19) (  -0.43,-139.15)  222.91                80
 01/03/2021   22:32:48   (  -0.01,-137.18) (   0.57,-134.56)  298.55                80
 01/05/2021   10:51:38   (   0.00,-137.17) (   0.58,-139.74)  293.90                80
 01/06/2021   10:35:20   (   0.00,-137.15) (  -0.42,-135.15)  227.23                80
 01/07/2021   22:54:18   (  -0.01,-137.12) (  -0.73,-140.38)  370.69                80
 01/08/2021   22:38:00   (  -0.01,-137.10) (   0.27,-135.78)  150.02                80