Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2020 12 23.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/23/2020   06:37:09   (  -0.02, -75.19) (   0.09, -75.60)   47.25                80
 12/24/2020   06:15:32   (  -0.02, -75.20) (  -0.96, -71.02)  476.38                80
 12/25/2020   18:37:09   (   0.01, -75.22) (  -0.25, -76.23)  115.87                80
 12/26/2020   18:20:52   (  -0.01, -75.23) (   0.81, -71.65)  408.43                80
 12/28/2020   06:42:21   (   0.01, -75.25) (   0.35, -76.84)  180.51                80
 12/29/2020   06:20:44   (   0.02, -75.26) (  -0.64, -72.25)  343.36                80
 12/30/2020   18:42:21   (  -0.02, -75.28) (  -0.50, -77.47)  249.11                80
 12/31/2020   18:26:05   (  -0.02, -75.30) (   0.55, -72.89)  275.17                80
 01/02/2021   06:47:34   (   0.02, -75.32) (   0.61, -78.08)  312.97                80
 01/03/2021   06:25:57   (   0.01, -75.34) (  -0.39, -73.48)  211.16                80
 01/04/2021   18:47:34   (   0.00, -75.37) (  -0.76, -78.71)  380.96                80
 01/05/2021   18:31:17   (   0.01, -75.39) (   0.30, -74.13)  143.83                80