Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/23/2020   10:54:21   (   0.02,-137.17) (   0.84,-140.74)  406.91                80
 10/24/2020   10:38:05   (   0.02,-137.16) (  -0.20,-136.16)  114.16                80
 10/25/2020   22:57:03   (  -0.02,-137.14) (  -0.98,-141.38)  484.33                80
 10/26/2020   22:40:47   (  -0.02,-137.13) (   0.05,-136.80)   36.69                80
 10/29/2020   10:40:39   (   0.01,-137.10) (   0.05,-137.41)   35.02                80
 10/30/2020   10:24:22   (   0.02,-137.09) (  -0.92,-132.82)  485.81                80
 10/31/2020   22:43:20   (  -0.01,-137.05) (  -0.25,-138.05)  113.45                80
 11/01/2020   22:27:04   (  -0.02,-137.03) (   0.79,-133.47)  406.81                80
 11/03/2020   10:45:53   (   0.01,-137.01) (   0.36,-138.66)  187.16                80
 11/04/2020   10:29:36   (   0.01,-136.98) (  -0.62,-134.06)  332.51                80