Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 8 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 08/22/2020   10:29:17   (   0.03,-137.18) (  -0.48,-134.90)  259.97                80
 08/23/2020   22:50:55   (  -0.03,-137.17) (  -0.67,-140.13)  336.54                80
 08/24/2020   22:34:39   (  -0.03,-137.16) (   0.35,-135.55)  184.62                80
 08/26/2020   10:53:29   (   0.03,-137.14) (   0.81,-140.74)  409.25                80
 08/27/2020   10:37:13   (   0.02,-137.13) (  -0.21,-136.16)  111.30                80
 08/28/2020   22:56:11   (   0.00,-137.11) (  -0.94,-141.39)  487.20                80
 08/29/2020   22:39:54   (   0.01,-137.09) (   0.08,-136.80)   33.12                80
 09/01/2020   10:39:48   (  -0.00,-137.05) (   0.06,-137.42)   41.10                80
 09/02/2020   10:23:32   (  -0.00,-137.04) (  -0.95,-132.83)  479.16                80
 09/03/2020   22:42:29   (   0.00,-137.01) (  -0.25,-138.05)  119.31                80
 09/04/2020   22:26:13   (   0.00,-136.99) (   0.76,-133.47)  400.75                80