Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 2 28.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 03/01/2021   10:10:56   (  -0.16,-128.23) (  -0.04,-128.68)   52.48                80
 03/02/2021   09:49:20   (  -0.16,-128.24) (  -1.11,-124.11)  471.87                80
 03/03/2021   22:10:57   (   0.15,-128.30) (  -0.07,-129.32)  116.13                80
 03/04/2021   21:54:39   (   0.16,-128.32) (   0.95,-124.73)  408.45                80
 03/06/2021   10:16:08   (  -0.14,-128.31) (   0.19,-129.92)  182.40                80
 03/07/2021   09:54:30   (  -0.15,-128.32) (  -0.82,-125.33)  341.17                80
 03/08/2021   22:16:07   (   0.13,-128.36) (  -0.35,-130.55)  248.71                80
 03/09/2021   21:59:50   (   0.13,-128.37) (   0.67,-125.96)  275.37                80
 03/11/2021   10:21:18   (  -0.12,-128.37) (   0.48,-131.14)  315.03                80
 03/12/2021   09:59:41   (  -0.13,-128.38) (  -0.53,-126.55)  208.33                80
 03/13/2021   22:21:18   (   0.11,-128.41) (  -0.62,-131.77)  382.57                80