Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 12 3.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/04/2020   10:58:17   (  -0.00,-137.23) (   0.99,-141.51)  489.00                80
 12/05/2020   10:42:00   (  -0.00,-137.22) (  -0.06,-136.93)   32.88                80
 12/07/2020   22:42:01   (   0.00,-137.20) (  -0.05,-137.57)   41.97                80
 12/08/2020   22:25:44   (   0.00,-137.19) (   0.94,-132.98)  479.70                80
 12/10/2020   10:44:33   (  -0.00,-137.18) (   0.23,-138.17)  113.08                80
 12/11/2020   10:28:17   (   0.00,-137.16) (  -0.82,-133.59)  408.01                80
 12/12/2020   22:47:13   (  -0.00,-137.13) (  -0.39,-138.80)  189.68                80
 12/13/2020   22:30:56   (  -0.01,-137.12) (   0.66,-134.22)  330.99                80
 12/15/2020   10:52:26   (   0.01,-137.09) (   0.51,-139.40)  263.13                80
 12/16/2020   10:30:48   (   0.01,-137.07) (  -0.48,-134.81)  256.97                80