Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 8 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)
 08/27/2021   10:12:22   (   0.45,-128.29) (   0.47,-128.37)    8.42                80
 08/29/2021   22:17:38   (  -0.45,-128.23) (  -0.63,-128.98)   85.80                80
 08/30/2021   21:56:01   (  -0.44,-128.23) (   0.43,-124.40)  437.05                80
 09/01/2021   10:17:28   (   0.44,-128.28) (   0.75,-129.57)  146.74                80
 09/02/2021   10:01:11   (   0.43,-128.28) (  -0.31,-124.98)  375.82                80
 09/03/2021   22:20:06   (  -0.43,-128.20) (  -0.85,-130.19)  226.08                80
 09/04/2021   22:03:48   (  -0.43,-128.19) (   0.16,-125.59)  296.15                80
 09/06/2021   10:22:36   (   0.42,-128.24) (   0.97,-130.78)  288.79                80
 09/07/2021   10:06:17   (   0.42,-128.23) (  -0.04,-126.18)  233.42                80
 09/08/2021   22:25:13   (  -0.41,-128.15) (  -1.12,-131.39)  368.90                80