Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 4 2.  Predictions up to the next  14.0 days:

     Date     Time(GOES-15)   GOES-15 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 04/02/2021   10:01:23   (  -0.05,-128.29) (  -0.39,-126.82)  168.84                80
 04/03/2021   22:22:59   (   0.03,-128.28) (  -0.78,-132.03)  426.30                80
 04/04/2021   22:06:42   (   0.04,-128.27) (   0.24,-127.44)   94.86                80
 04/06/2021   10:28:09   (  -0.02,-128.23) (   0.99,-132.61)  498.91                80
 04/07/2021   10:06:33   (  -0.03,-128.21) (  -0.09,-128.03)   21.51                80
 04/09/2021   22:09:11   (   0.02,-128.17) (  -0.11,-128.64)   54.16                80
 04/10/2021   21:52:54   (   0.03,-128.16) (   0.98,-124.07)  466.88                80
 04/12/2021   10:14:22   (  -0.02,-128.12) (   0.20,-129.24)  126.88                80
 04/13/2021   09:52:45   (  -0.03,-128.10) (  -0.82,-124.65)  393.04                80
 04/14/2021   22:14:20   (   0.02,-128.06) (  -0.39,-129.86)  204.76                80
 04/15/2021   21:58:03   (   0.02,-128.04) (   0.63,-125.27)  315.56                80