Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 6 18.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 06/20/2021   06:39:40   (  -0.04, -75.20) (   0.11, -75.76)   64.40                80
 06/21/2021   06:23:22   (  -0.04, -75.18) (  -0.94, -71.17)  457.09                80
 06/22/2021   18:42:19   (   0.05, -75.16) (  -0.25, -76.38)  139.48                80
 06/23/2021   18:26:01   (   0.05, -75.15) (   0.80, -71.80)  382.26                80
 06/25/2021   06:44:49   (  -0.06, -75.13) (   0.34, -76.97)  209.89                80
 06/26/2021   06:28:30   (  -0.05, -75.12) (  -0.64, -72.38)  312.06                80
 06/27/2021   18:47:27   (   0.06, -75.10) (  -0.48, -77.60)  283.76                80
 06/28/2021   18:31:09   (   0.06, -75.10) (   0.51, -73.00)  238.97                80
 06/30/2021   06:49:56   (  -0.07, -75.10) (   0.63, -78.18)  351.22                80
 07/01/2021   06:33:39   (  -0.06, -75.10) (  -0.41, -73.59)  171.91                80