Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 9 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 09/24/2020   22:44:33   (  -0.04,-137.20) (  -0.34,-138.47)  145.10                80
 09/25/2020   22:28:16   (  -0.04,-137.20) (   0.68,-133.89)  376.89                80
 09/27/2020   10:47:06   (   0.03,-137.21) (   0.48,-139.08)  213.94                80
 09/28/2020   10:30:50   (   0.03,-137.21) (  -0.60,-134.51)  307.97                80
 09/29/2020   22:49:48   (  -0.02,-137.19) (  -0.58,-139.74)  289.44                80
 09/30/2020   22:33:32   (  -0.02,-137.19) (   0.44,-135.15)  232.36                80
 10/02/2020   10:52:21   (   0.02,-137.19) (   0.72,-140.34)  358.79                80
 10/03/2020   10:36:05   (   0.02,-137.19) (  -0.30,-135.76)  162.74                80
 10/04/2020   22:55:03   (  -0.02,-137.17) (  -0.88,-140.99)  435.50                80
 10/05/2020   22:38:47   (  -0.02,-137.15) (   0.14,-136.40)   85.52                80