Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2022 4 21.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/21/2022   22:48:08   (   0.03,-137.17) (   0.42,-135.58)  182.49                80
 04/23/2022   11:13:07   (  -0.02,-137.16) (   0.84,-140.95)  431.71                80
 04/24/2022   10:52:03   (  -0.02,-137.15) (  -0.18,-136.50)   74.97                80
 04/26/2022   22:58:48   (   0.01,-137.13) (  -0.05,-137.46)   37.57                80
 04/27/2022   22:37:45   (   0.02,-137.12) (   0.97,-133.01)  469.09                80
 04/29/2022   11:02:43   (  -0.01,-137.11) (   0.29,-138.38)  145.62                80
 04/30/2022   10:41:39   (  -0.02,-137.10) (  -0.72,-133.93)  360.64                80
 05/01/2022   23:04:08   (   0.01,-137.07) (  -0.50,-139.35)  259.53                80
 05/02/2022   22:48:24   (   0.01,-137.06) (   0.52,-134.90)  246.41                80
 05/04/2022   11:10:43   (  -0.01,-137.03) (   0.75,-140.27)  369.59                80