Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 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)
 11/12/2021   10:51:29   (   0.01,-137.20) (   0.07,-137.57)   41.70                80
 11/13/2021   10:35:10   (   0.01,-137.20) (  -0.96,-132.98)  481.61                80
 11/14/2021   22:54:06   (  -0.01,-137.18) (  -0.21,-138.18)  113.05                80
 11/15/2021   22:37:47   (  -0.01,-137.18) (   0.83,-133.59)  410.14                80
 11/17/2021   10:56:33   (   0.01,-137.18) (   0.37,-138.75)  179.25                80
 11/18/2021   10:40:14   (   0.01,-137.17) (  -0.67,-134.15)  343.48                80
 11/19/2021   22:59:09   (  -0.01,-137.14) (  -0.49,-139.36)  252.19                80
 11/20/2021   22:42:51   (  -0.01,-137.13) (   0.55,-134.77)  270.08                80
 11/22/2021   11:01:36   (   0.01,-137.11) (   0.66,-139.92)  320.82                80
 11/23/2021   10:45:18   (   0.01,-137.10) (  -0.38,-135.33)  200.90                80
 11/24/2021   23:04:13   (  -0.00,-137.06) (  -0.76,-140.54)  396.11                80
 11/25/2021   22:47:54   (  -0.00,-137.04) (   0.22,-135.93)  125.30                80