Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 5 12.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 05/12/2021   10:43:11   (  -0.02,-137.19) (  -0.10,-136.95)   28.36                80
 05/14/2021   22:48:29   (   0.01,-137.17) (  -0.08,-137.56)   44.90                80
 05/15/2021   22:26:51   (   0.02,-137.16) (   0.96,-132.98)  476.83                80
 05/17/2021   10:50:58   (  -0.01,-137.14) (   0.24,-138.15)  115.49                80
 05/18/2021   10:29:21   (  -0.01,-137.12) (  -0.80,-133.56)  405.87                80
 05/19/2021   22:50:57   (   0.01,-137.10) (  -0.36,-138.77)  190.70                80
 05/20/2021   22:34:40   (   0.01,-137.08) (   0.67,-134.18)  330.40                80
 05/22/2021   10:56:07   (  -0.00,-137.05) (   0.52,-139.35)  262.82                80
 05/23/2021   10:34:30   (  -0.01,-137.03) (  -0.52,-134.77)  257.84                80
 05/24/2021   22:56:06   (   0.00,-136.99) (  -0.64,-139.98)  340.13                80
 05/25/2021   22:39:47   (   0.01,-136.97) (   0.34,-135.38)  180.05                80