Simultaneous Nadir Overpasses (SNOs) between GOES-15 and FY3D
TLE Epoch: 2021 8 25.  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   10:12:33   (  -0.27,-128.32) (  -0.22,-128.52)   23.31                80
 08/29/2021   22:15:10   (   0.28,-128.25) (   0.06,-129.13)  101.43                80
 08/30/2021   21:58:53   (   0.28,-128.25) (   1.12,-124.55)  421.70                80
 09/01/2021   10:17:41   (  -0.30,-128.32) (   0.00,-129.73)  161.00                80
 09/02/2021   10:01:22   (  -0.29,-128.32) (  -1.00,-125.14)  361.95                80
 09/03/2021   22:22:58   (   0.31,-128.23) (  -0.15,-130.35)  240.54                80
 09/04/2021   22:01:19   (   0.31,-128.23) (   0.85,-125.75)  281.85                80
 09/06/2021   10:22:48   (  -0.32,-128.28) (   0.27,-130.93)  302.18                80
 09/07/2021   10:06:29   (  -0.32,-128.28) (  -0.73,-126.34)  220.37                80