Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 16.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 11/17/2021   10:56:33   (   0.01,-137.22) (   0.33,-138.75)  173.91                80
 11/18/2021   10:40:15   (   0.01,-137.22) (  -0.71,-134.16)  349.69                80
 11/19/2021   22:59:09   (  -0.01,-137.21) (  -0.50,-139.35)  244.77                80
 11/20/2021   22:42:50   (  -0.01,-137.20) (   0.53,-134.76)  278.35                80
 11/22/2021   11:01:37   (   0.01,-137.20) (   0.61,-139.93)  311.22                80
 11/23/2021   10:45:18   (   0.01,-137.19) (  -0.43,-135.34)  211.36                80
 11/24/2021   23:04:13   (  -0.01,-137.16) (  -0.77,-140.53)  384.45                80
 11/25/2021   22:47:54   (  -0.01,-137.15) (   0.27,-135.94)  137.81                80
 11/27/2021   11:06:40   (   0.00,-137.13) (   0.87,-141.11)  452.82                80
 11/28/2021   10:50:21   (   0.00,-137.12) (  -0.11,-136.51)   69.17                80