Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 27.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/27/2021   11:01:16   (  -0.00,-137.19) (   0.75,-140.57)  384.52                80
 05/28/2021   10:39:39   (  -0.01,-137.19) (  -0.29,-135.98)  137.68                80
 05/29/2021   23:01:15   (   0.00,-137.17) (  -0.89,-141.19)  457.74                80
 05/30/2021   22:44:58   (   0.01,-137.17) (   0.15,-136.61)   64.46                80
 06/02/2021   10:47:26   (  -0.00,-137.15) (   0.03,-137.18)    5.10                80
 06/04/2021   22:47:25   (   0.00,-137.12) (  -0.17,-137.80)   78.45                80
 06/05/2021   22:31:08   (   0.00,-137.11) (   0.87,-133.22)  443.37                80
 06/07/2021   10:52:35   (  -0.00,-137.09) (   0.28,-138.39)  148.29                80
 06/08/2021   10:30:58   (  -0.01,-137.07) (  -0.76,-133.81)  372.97                80
 06/09/2021   22:52:34   (   0.01,-137.04) (  -0.42,-139.02)  224.57                80