Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 26.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 02/26/2021   22:08:26   (   0.16,-128.20) (   0.19,-128.09)   12.45                80
 03/01/2021   10:10:56   (  -0.16,-128.23) (  -0.07,-128.69)   52.60                80
 03/02/2021   09:49:19   (  -0.16,-128.24) (  -1.08,-124.10)  471.67                80
 03/03/2021   22:10:56   (   0.15,-128.29) (  -0.09,-129.32)  116.95                80
 03/04/2021   21:54:40   (   0.16,-128.31) (   0.98,-124.74)  407.54                80
 03/06/2021   10:16:07   (  -0.14,-128.31) (   0.21,-129.91)  183.00                80
 03/07/2021   09:54:30   (  -0.15,-128.31) (  -0.80,-125.32)  340.48                80
 03/08/2021   22:16:07   (   0.13,-128.35) (  -0.36,-130.54)  249.99                80
 03/09/2021   21:59:49   (   0.13,-128.36) (   0.66,-125.95)  274.00                80
 03/11/2021   10:21:18   (  -0.12,-128.36) (   0.48,-131.14)  316.11                80