Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 8 6.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/06/2021   22:52:04   (  -0.03,-137.18) (  -0.30,-138.48)  146.87                80
 08/07/2021   22:35:46   (  -0.03,-137.17) (   0.70,-133.88)  375.20                80
 08/09/2021   10:57:13   (   0.03,-137.15) (   0.48,-139.05)  217.40                80
 08/10/2021   10:38:16   (   0.03,-137.14) (  -0.58,-134.47)  304.27                80
 08/11/2021   22:57:11   (  -0.02,-137.12) (  -0.60,-139.67)  291.15                80
 08/12/2021   22:40:53   (  -0.03,-137.10) (   0.40,-135.08)  230.38                80
 08/14/2021   10:59:41   (   0.02,-137.07) (   0.72,-140.26)  363.33                80
 08/15/2021   10:43:22   (   0.02,-137.05) (  -0.27,-135.66)  157.53                80
 08/16/2021   23:02:18   (  -0.01,-137.02) (  -0.89,-140.87)  439.64                80
 08/17/2021   22:46:00   (   0.00,-136.99) (   0.17,-136.29)   80.23                80