Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 2 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/22/2021   10:41:31   (  -0.04,-137.21) (  -0.09,-137.04)   19.76                80
 02/24/2021   22:44:10   (   0.03,-137.20) (  -0.08,-137.67)   53.82                80
 02/25/2021   22:27:53   (   0.03,-137.19) (   0.93,-133.08)  468.38                80
 02/27/2021   10:49:21   (  -0.02,-137.19) (   0.21,-138.26)  122.37                80
 02/28/2021   10:27:44   (  -0.02,-137.18) (  -0.81,-133.67)  399.30                80
 03/01/2021   22:49:21   (   0.02,-137.15) (  -0.37,-138.89)  197.90                80
 03/02/2021   22:33:04   (   0.02,-137.14) (   0.64,-134.30)  323.44                80
 03/04/2021   10:54:32   (  -0.02,-137.12) (   0.49,-139.48)  268.60                80
 03/05/2021   10:32:54   (  -0.02,-137.11) (  -0.52,-134.90)  252.17                80
 03/06/2021   22:54:32   (   0.01,-137.07) (  -0.65,-140.11)  346.48                80
 03/07/2021   22:38:14   (   0.00,-137.05) (   0.37,-135.52)  174.10                80