Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 11 17.  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   10:56:32   (   0.01,-137.22) (   0.37,-138.74)  173.70                80
 11/18/2021   10:40:14   (   0.01,-137.22) (  -0.66,-134.15)  350.03                80
 11/19/2021   22:59:09   (  -0.01,-137.22) (  -0.49,-139.36)  244.11                80
 11/20/2021   22:42:51   (  -0.01,-137.21) (   0.55,-134.76)  279.17                80
 11/22/2021   11:01:37   (   0.01,-137.21) (   0.59,-139.93)  310.28                80
 11/23/2021   10:45:18   (   0.01,-137.20) (  -0.38,-135.33)  212.47                80
 11/24/2021   23:04:13   (  -0.01,-137.17) (  -0.76,-140.54)  383.08                80
 11/25/2021   22:47:54   (  -0.01,-137.16) (   0.28,-135.94)  139.35                80
 11/27/2021   11:06:40   (   0.00,-137.15) (   0.92,-141.10)  451.14                80
 11/28/2021   10:50:21   (   0.00,-137.14) (  -0.11,-136.51)   70.97                80
 11/30/2021   22:50:17   (  -0.00,-137.08) (  -0.03,-137.11)    4.06                80