Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 10 25.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 10/25/2021   22:36:27   (  -0.03,-137.22) (   0.84,-133.44)  431.38                80
 10/27/2021   10:55:14   (   0.02,-137.22) (   0.31,-138.61)  157.64                80
 10/28/2021   10:38:55   (   0.02,-137.22) (  -0.72,-134.02)  365.60                80
 10/29/2021   22:57:50   (  -0.01,-137.21) (  -0.47,-139.22)  228.96                80
 10/30/2021   22:41:32   (  -0.01,-137.21) (   0.55,-134.63)  294.05                80
 11/01/2021   11:00:18   (   0.01,-137.20) (   0.59,-139.80)  295.75                80
 11/02/2021   10:44:00   (   0.01,-137.19) (  -0.43,-135.20)  226.91                80
 11/03/2021   23:02:55   (  -0.01,-137.17) (  -0.75,-140.41)  368.67                80
 11/04/2021   22:46:37   (  -0.01,-137.16) (   0.28,-135.81)  153.57                80
 11/06/2021   11:05:23   (   0.01,-137.14) (   0.87,-140.98)  437.64                80
 11/07/2021   10:49:04   (   0.01,-137.12) (  -0.15,-136.39)   83.82                80