Simultaneous Nadir Overpasses (SNOs) between GOES-16 and FY3D
TLE Epoch: 2021 12 22.  Predictions up to the next  14.0 days:

     Date     Time(GOES-16)   GOES-16 Lat/Lon  FY3D Lat/Lon    Distance(km)  Time Diff(sec)
 12/22/2021   06:52:32   (  -0.03, -75.18) (   0.34, -76.84)  189.43                80
 12/23/2021   06:31:29   (  -0.02, -75.18) (  -0.65, -72.39)  317.21                80
 12/24/2021   18:54:00   (   0.03, -75.18) (  -0.59, -77.82)  301.71                80
 12/25/2021   18:38:17   (   0.03, -75.18) (   0.41, -73.37)  205.49                80
 12/27/2021   07:00:38   (  -0.03, -75.18) (   0.79, -78.77)  408.85                80
 12/28/2021   06:39:36   (  -0.03, -75.19) (  -0.20, -74.32)   98.50                80
 12/30/2021   18:43:44   (   0.02, -75.20) (  -0.02, -75.30)   12.17                80
 12/31/2021   18:28:01   (   0.01, -75.20) (   0.98, -70.85)  495.61                80
 01/02/2022   06:50:23   (  -0.00, -75.21) (   0.24, -76.24)  118.06                80
 01/03/2022   06:29:20   (   0.01, -75.22) (  -0.76, -71.80)  389.59                80
 01/04/2022   18:51:50   (  -0.01, -75.23) (  -0.45, -77.23)  227.83                80