Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/19/2020   22:39:18   (  -0.04,-137.18) (  -0.04,-137.23)    4.85                80
 09/22/2020   10:41:51   (   0.04,-137.17) (   0.19,-137.83)   75.60                80
 09/23/2020   10:25:34   (   0.04,-137.16) (  -0.83,-133.25)  445.38                80
 09/24/2020   22:44:33   (  -0.04,-137.14) (  -0.34,-138.48)  152.74                80
 09/25/2020   22:28:16   (  -0.03,-137.13) (   0.68,-133.90)  367.92                80
 09/27/2020   10:47:06   (   0.02,-137.11) (   0.49,-139.08)  225.74                80
 09/28/2020   10:30:49   (   0.02,-137.09) (  -0.54,-134.50)  294.80                80
 09/29/2020   22:49:47   (  -0.02,-137.07) (  -0.64,-139.73)  303.89                80
 09/30/2020   22:33:31   (  -0.02,-137.05) (   0.39,-135.15)  216.61                80
 10/02/2020   10:52:20   (   0.01,-137.03) (   0.78,-140.34)  377.32                80