Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 4 29.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/30/2021   22:10:48   (  -0.04,-127.61) (  -0.32,-128.87)  143.88                80
 05/01/2021   21:54:31   (  -0.04,-127.65) (   0.71,-124.29)  383.69                80
 05/03/2021   10:15:59   (   0.04,-127.77) (   0.45,-129.47)  194.23                80
 05/04/2021   09:54:23   (   0.04,-127.80) (  -0.64,-124.89)  332.60                80
 05/05/2021   22:15:58   (  -0.05,-127.81) (  -0.57,-130.09)  260.34                80
 05/06/2021   21:59:41   (  -0.04,-127.85) (   0.47,-125.50)  267.19                80
 05/08/2021   10:21:10   (   0.05,-127.97) (   0.63,-130.70)  309.81                80
 05/09/2021   09:59:32   (   0.04,-128.01) (  -0.40,-126.11)  216.82                80
 05/10/2021   22:21:08   (  -0.05,-128.00) (  -0.81,-131.31)  377.78                80
 05/11/2021   22:04:51   (  -0.04,-128.04) (   0.28,-126.74)  149.19                80
 05/13/2021   10:26:20   (   0.04,-128.16) (   0.87,-131.92)  427.95                80