Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 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)
 02/17/2021   10:36:19   (  -0.04,-137.21) (  -0.32,-135.81)  159.32                80
 02/18/2021   22:57:57   (   0.03,-137.20) (  -0.81,-141.04)  436.53                80
 02/19/2021   22:41:40   (   0.03,-137.19) (   0.20,-136.45)   85.26                80
 02/22/2021   10:41:30   (  -0.02,-137.16) (  -0.02,-137.03)   14.84                80
 02/24/2021   22:44:10   (  -0.01,-137.12) (  -0.10,-137.67)   61.85                80
 02/25/2021   22:27:53   (  -0.00,-137.10) (   0.91,-133.08)  458.86                80
 02/27/2021   10:49:20   (   0.00,-137.07) (   0.29,-138.25)  134.91                80
 02/28/2021   10:27:44   (   0.00,-137.05) (  -0.78,-133.67)  385.36                80
 03/01/2021   22:49:21   (  -0.00,-137.01) (  -0.40,-138.89)  213.43                80
 03/02/2021   22:33:04   (  -0.00,-136.98) (   0.61,-134.30)  306.55                80