Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2021 12 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/30/2021   11:06:34   (  -0.03,-137.22) (   0.79,-140.89)  418.24                80
 12/31/2021   10:50:52   (  -0.02,-137.22) (  -0.21,-136.44)   88.69                80
 01/02/2022   22:52:18   (   0.01,-137.20) (  -0.06,-137.41)   24.53                80
 01/03/2022   22:36:36   (   0.00,-137.20) (   0.95,-132.97)  481.90                80
 01/05/2022   10:56:17   (  -0.00,-137.19) (   0.26,-138.36)  133.74                80
 01/06/2022   10:40:35   (  -0.01,-137.18) (  -0.75,-133.91)  372.35                80
 01/07/2022   23:00:24   (   0.01,-137.16) (  -0.51,-139.33)  248.04                80
 01/08/2022   22:44:42   (   0.01,-137.16) (   0.51,-134.89)  258.10                80
 01/10/2022   11:04:23   (  -0.01,-137.14) (   0.71,-140.28)  357.81                80
 01/11/2022   10:48:40   (  -0.00,-137.13) (  -0.30,-135.83)  148.07                80