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   10:15:01   (   0.45,-128.30) (   0.49,-128.36)    8.76                80
 08/29/2021   22:17:39   (  -0.45,-128.23) (  -0.59,-128.99)   86.05                80
 08/30/2021   21:56:01   (  -0.44,-128.22) (   0.41,-124.39)  436.83                80
 09/01/2021   10:17:29   (   0.44,-128.28) (   0.71,-129.58)  146.73                80
 09/02/2021   10:01:10   (   0.43,-128.28) (  -0.29,-124.98)  375.81                80
 09/03/2021   22:20:06   (  -0.43,-128.20) (  -0.87,-130.19)  226.32                80
 09/04/2021   22:03:47   (  -0.43,-128.19) (   0.14,-125.59)  295.90                80
 09/06/2021   10:22:36   (   0.42,-128.24) (   0.99,-130.77)  288.83                80
 09/07/2021   10:06:17   (   0.42,-128.23) (  -0.01,-126.18)  233.38                80
 09/08/2021   22:25:12   (  -0.41,-128.15) (  -1.14,-131.39)  369.19                80