Simultaneous Nadir Overpasses (SNOs) between GOES-17 and FY3D
TLE Epoch: 2020 1 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-17)   GOES-17 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 01/23/2020   10:47:43   (   0.04,-137.19) (   0.49,-139.21)  230.82                80
 01/24/2020   10:26:07   (   0.04,-137.18) (  -0.54,-134.64)  289.84                80
 01/25/2020   22:50:26   (  -0.05,-137.17) (  -0.66,-139.87)  307.36                80
 01/26/2020   22:28:51   (  -0.05,-137.16) (   0.38,-135.29)  213.14                80
 01/28/2020   10:53:01   (   0.06,-137.14) (   0.79,-140.49)  381.66                80
 01/29/2020   10:31:26   (   0.05,-137.13) (  -0.24,-135.92)  138.57                80
 01/30/2020   22:55:45   (  -0.06,-137.11) (  -0.96,-141.14)  459.43                80
 01/31/2020   22:34:10   (  -0.06,-137.10) (   0.08,-136.57)   60.53                80
 02/03/2020   10:39:23   (   0.07,-137.04) (   0.11,-137.18)   15.89                80
 02/05/2020   22:42:07   (  -0.08,-136.99) (  -0.27,-137.84)   96.40                80