Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 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)
 10/23/2020   10:54:22   (   0.02,-137.20) (   0.81,-140.75)  403.64                80
 10/24/2020   10:38:05   (   0.02,-137.21) (  -0.22,-136.17)  119.01                80
 10/25/2020   22:57:03   (  -0.02,-137.20) (  -0.95,-141.39)  477.27                80
 10/26/2020   22:40:47   (  -0.02,-137.20) (   0.08,-136.81)   45.28                80
 10/29/2020   10:40:39   (   0.01,-137.22) (   0.08,-137.41)   22.38                80
 10/31/2020   22:43:21   (  -0.01,-137.20) (  -0.22,-138.05)   96.94                80
 11/01/2020   22:27:04   (  -0.02,-137.20) (   0.82,-133.47)  424.86                80
 11/03/2020   10:45:54   (   0.01,-137.20) (   0.33,-138.66)  166.59                80
 11/04/2020   10:29:37   (   0.01,-137.19) (  -0.71,-134.08)  354.63                80
 11/05/2020   22:48:34   (  -0.01,-137.16) (  -0.51,-139.30)  243.96                80