Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 10 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/29/2020   10:40:39   (   0.02,-137.22) (   0.06,-137.41)   21.91                80
 10/31/2020   22:43:21   (  -0.02,-137.20) (  -0.19,-138.05)   96.38                80
 11/01/2020   22:27:05   (  -0.02,-137.20) (   0.85,-133.47)  425.43                80
 11/03/2020   10:45:53   (   0.02,-137.19) (   0.35,-138.65)  166.52                80
 11/04/2020   10:29:36   (   0.02,-137.18) (  -0.68,-134.07)  354.64                80
 11/05/2020   22:48:35   (  -0.01,-137.16) (  -0.47,-139.30)  243.67                80
 11/06/2020   22:32:17   (  -0.01,-137.14) (   0.51,-134.71)  277.02                80
 11/08/2020   10:51:07   (   0.01,-137.12) (   0.64,-139.90)  316.49                80
 11/09/2020   10:34:50   (   0.01,-137.10) (  -0.40,-135.32)  203.78                80
 11/10/2020   22:53:47   (  -0.00,-137.07) (  -0.80,-140.53)  395.55                80