Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 12 4.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2021   10:47:01   (  -0.00,-137.20) (  -0.34,-135.69)  172.11                80
 12/05/2021   23:06:52   (   0.00,-137.19) (  -0.87,-141.12)  448.50                80
 12/06/2021   22:51:10   (  -0.00,-137.18) (   0.13,-136.68)   57.54                80
 12/09/2021   10:52:27   (   0.00,-137.16) (   0.13,-137.61)   52.54                80
 12/10/2021   10:36:46   (   0.00,-137.15) (  -0.92,-133.18)  453.37                80
 12/11/2021   22:56:36   (  -0.00,-137.13) (  -0.34,-138.60)  167.81                80
 12/12/2021   22:40:54   (  -0.00,-137.12) (   0.66,-134.16)  337.94                80
 12/14/2021   11:00:35   (   0.00,-137.11) (   0.54,-139.55)  278.28                80
 12/15/2021   10:44:53   (   0.00,-137.09) (  -0.46,-135.10)  227.10                80
 12/16/2021   23:04:43   (  -0.00,-137.06) (  -0.79,-140.53)  395.05                80
 12/17/2021   22:49:00   (  -0.00,-137.05) (   0.21,-136.08)  109.80                80